Issue Date 02/18/02
APPLICATION NOTE
Leased Line Modem
Leased Line Modem...... 3
Introduction...... 3
Key Concepts...... 4 Application Details...... 4 Theory of Operation ...... 6 Components...... 8 Planning Considerations...... 10 Design Considerations ...... 10 Detailed Procedures...... 12 Configuring the Modems ...... 12 Configuring the MultiModemV32L Unit ...... 12 Configuring the MultiModemII (MT1432A) Unit...... 22 Configuring the MultiModemII (MT1932 and MT2834) Unit ...... 32 Using Commissioning Procedures...... 39 Installing the Modems...... 40 Using the Remote Printer Application...... 46 Using the Remote N2 Bus Application...... 48 Troubleshooting Procedures ...... 54 Checking for a Defective Modem...... 55 Checking Revision Level ...... 56 Modem Does Not Configure Properly...... 56 Reference ...... 57 Modem Commands ...... 57 Modem Switch Settings ...... 57
© 2002 Johnson Controls, Inc. www.johnsoncontrols.com Code No. LIT-6363141 Software Release 12.00 2 Leased Line Modem Application Note
Ordering Information...... 58 Johnson Controls Code Numbers...... 58 Vendor Code Numbers...... 58 Ordering a Leased Line...... 59 Leased Line Modem Application Note 3
Leased Line Modem
Introduction The Leased Line Modem applications allow the Metasys Network Control Module (NCM) to communicate with remote Operator Workstations (OWSs), printers, and N2 Bus devices over a pair of leased line modems. These applications provide fast communication over leased lines without the dialing and handshaking delays that are characteristic of dial-up communication. You can link a remote OWS located in a different building, send alarms to remote printers, and extend the N2 Bus to remote locations. 4 Leased Line Modem Application Note
Key Concepts
Application Details Remote Operator Workstation - allows you to have an OWS in any remote location via the NCM’s RS-232 serial port or RS-232 submodule port (Figure 1). Remote Printer - allows you to have a printer in any remote location via the NCM’s RS-232 serial port or RS-232 submodule port (Figure 2). Remote N2 Bus - allows you to extend the physical N2 Bus over leased lines to connect N2 devices (Figure 3 and Figure 4). Figure 1 shows the Remote Operator Workstation application, in which a pair of modems enable communication between the NCM and an OWS over leased lines. The RS-232 connection at the NCM can be at the RS-232 serial port or the RS-232 submodule port.
Either NCM’s RS-232 Serial Port
RS-232 Modem Modem or RS-232 Operator Submodule Port Workstation NCM Leased Lines Note: For NCM300, modem connects to NCM's Port 2 (RS-232 port). For NCM350, modem can connect to Port 6 (with additional serial card). For details on available ports based on your configuration, see the Network Control Module 300 Series Technical Bulletin (LIT-6360251). 2-Slot NCU OWSAPP
Figure 1: Remote Operator Workstation Application Leased Line Modem Application Note 5
Figure 2 shows the Remote Printer application, in which a pair of modems enable communication between the NCM and a printer over leased lines. The RS-232 connection at the NCM can be at the RS-232 serial port or the RS-232 submodule port.
Either NCM's RS-232 Serial Port
RS-232 or RS-232 Modem Modem Submodule Port Printer NCM Leased Lines
Note: For NCM300, modem connects to NCM's Port 2 (RS-232 port). PRNTAPP 2-Slot NCU
Figure 2: Remote Printer Application Figure 3and Figure 4 show two variations of the Remote N2 Bus application. The application in Figure 3 shows one RS-232-to-N2 Bus converter changing the N2 Bus signal to RS-232 levels, a pair of modems transmitting the signal over leased lines, and another converter changing the Bus signal back to RS-485 levels. As shown, two sides of the N2 Bus may be wired at the converter on the Network Control Unit (NCU) side. Also note that you can use this application with the NCM101/102, NCM401, NCM200, or NCM300. To Local N2 Bus Devices or N2 Bus
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Note: For NCM300, N2 connection is made at its N2 terminal block, not at the Communications Terminal Board (TBC). N2APP 2-Slot NCU
Figure 3: Remote N2 Bus Application via N2 Bus Submodule or Converter 6 Leased Line Modem Application Note
Figure 4 shows an application in which the RS-232 submodule installed in the NCM connects to a remote N2 Bus. A similar application can be used to extend the N2 Bus in the NCM300. The NCM200 cannot extend the N2 Bus in this way. Also, the following restrictions apply: • The N2 Bus cannot be wired at the Communication Terminal Board (TBC) on the NCU (only at the RS-232 submodule). • The NCU cannot contain any other modules (e.g., DCMs and XBNs) except the NCM.
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Figure 4: Remote N2 Bus Application via RS-232
Theory of Operation The Leased Line Modem applications are fully compatible with and transparent to Metasys functions and features. The applications apply only to the NCM’s RS-232 serial port, NCM submodule ports, and N2 Bus; they cannot be applied to the N1 Local Area Network (LAN). Two leased line modems were tested for these applications, both made by Multi-Tech™ Systems, Inc.: the MultiModem V32L and the MultiModemII modems. Both modems are functionally the same, but the smaller MultiModemII unit replaces the discontinued MultiModemV32L unit. Both modems are compatible with Hayes™ products and feature error correction, data compression, and speed conversion. They provide the following functions: • use leased line or dedicated wire. Dedicated wire is telephone wire that is hard wired exclusively for the modems. • communicate at various data rates up to 9600 bits per second (bps) for the MultiModemV32L unit and up to 28.8 kilobits per second (Kbps) for the MultiModemII unit depending on the NCM configuration. Leased Line Modem Application Note 7
• provide dialback protection over standard telephone lines, which automatically calls the dialback line when the leased line goes down, then re-establishes communication over the leased line from the dialback line when the modem detects that the leased line is reconnected. The dialback feature is optional and is used only when you specify both a dialback number and connect a telephone line to the Dial Line connector. • support 2- or 4-wire connections • support dedicated wire distances up to 1 mile at 9600 baud and 1/4-mile at 14,400 baud (longer for lower baud rates) • support leased line wire distances up to the maximum that your local telephone company provides • use communication format V.32, a worldwide standard This document uses the terms originate modem and answer modem. The originate modem initiates all telephone calls over the dialback line. The answer modem answers all telephone calls placed to it by the originate modem. 8 Leased Line Modem Application Note
Components
Table 1: Components of the Leased Line Modem Application Component Description N2 Bus Submodule Supplies RS-485 signals to the N2 Bus. The NCM101/102/401 requires this submodule, while the NCM200 and NCM300 integrate the N2 interface. RS-232 Submodule Provides a second RS-232 connection to the NCM. The NCM101/102/401/200 require this submodule, while the NCM300 does not. Leased Line Modem Allows Metasys components to communicate over a leased line or standard telephone line. The leased line modems that were tested are the MultiModemV32L unit and the MultiModemII unit from Multi-Tech Systems, Inc. Both modems include telephone wire that can be used between the modem and the phone wall jack. For more details on these modems, refer to their respective owner’s manuals*. RS-232-to-N2 Bus Converter Converts RS-232 signals to N2 Bus signals, and vice versa. Required because the N2 Bus uses RS-485 and the modems use RS-232. The converter uses a separate plug-in Class 2 transformer. RS-232 Cables Serve as the communication medium between Metasys devices and the modems. Various cable configurations are needed depending on the device. Leased Line Serves as the data line you rent from the local telephone company over which the modems communicate. Its general specifications are listed in the section Ordering a Leased Line. Telephone Wire Serves as the communication medium between the modem and the telephone wall jacks, and between two modems if you are using dedicated wire. Use standard telephone wire, 24 AWG, either 2- or 4-wire. Take special note of whether you use 2- or 4-wire, since one switch setting on the modem varies accordingly. *Note: The MultiModemV32L unit and MultiModemII unit are loop-start compatible modems. They will not function on ground-start PBX systems. Leased Line Modem Application Note 9
Table 2 can help decide which components are required for your application.
Table 2: Components Required Leased Line Application Components Required OWS or Printer (2) Leased Line Modems (See Figure 2.) (2) RS-232 Cables (1) RS-232 Submodule (not required if NCM’s RS-232 serial port is used) Leased Line Telephone Wire N2 Bus (2) Leased Line Modems (See Figure 3.) (2) RS-232 Cables (2) RS-232-to-N2 Bus Converters Power supply for each N2 Bus Converter (1) N2 Bus Submodule (NCM101/102/401)* Leased Line Telephone Wire N2 Bus with RS-232 (2) Leased Line Modems NCM101/102/300* (2) RS-232 Cables (See Figure 4.) (1) RS-232-to-N2 Bus Converter Power supply for each N2 Bus Converter (1) RS-232 Submodule** Leased Line Telephone Wire * For information on NCM300, see the Network Control Module 300 Series Technical Bulletin (LIT-6360251). ** Not required for NCM300. 10 Leased Line Modem Application Note
Planning Considerations Planning considerations for the Leased Line Modem application include space, environment, and power. The space requirements are included in Table 3.
Table 3: Space Requirements Component Dimensions MultiModemV32L Unit 185 x 41 x 279 mm (W x H x D) (7.28. x 1.61 x 10.98 in.) Transformer for MultiModemV32L Unit 64 x 102 x 70 mm (W x H x D) (2.52 x 4.02 x 2.76 in.) MultiModemII Unit 156 x 35 x 229 mm (W x H x D) (6.14 x 1.38 x 9.02 in.) Transformer for MultiModemII Unit 57 x 64 x 64 mm (W x H x D) (2.24 x 2.52 x 2.52 in.) RS-232-to-N2 Bus Converter 55 x 19 x 86 mm (W x H x D) (2.17 x 0.75 x 3.39 in.) Power Supply for RS-232-to-N2 Bus Converter 41 x 54 x 38 mm (W x H x D) (1.61 x 2.13 x 1.50 in.)
Environment The operating environment for the Leased Line Modem application components must maintain temperatures within the range of 0 to 50°C (32 to 122°F) while maintaining relative humidity at a value of 10 to 90% (non-condensing).
Power The MultiModemV32L unit and the MultiModemII unit require an external power source of 115 VAC at 0.3 A (60 Hz) or 240 VAC at 0.15 A (50 Hz). Connect the modem to a circuit that is free from heavy equipment and large induction motors. The RS-232-to-N2 Bus Converter is powered with a transformer that plugs into a 120 VAC wall outlet.
Design Considerations Design considerations for the Leased Line Modem application include cable distances, leased line modem, and public carrier leased line capability. The allowable distances for the dedicated wire are listed in Table 4. There is no distance limitation when using public carrier leased lines. Leased Line Modem Application Note 11
Table 4: Cable Distances Modem Baud Rate Allowable Distance* MultiModemV32L Unit 9600 1.6 km (1 mile) MultiModemII Unit 9600 1.6 km to 4.8 km (1 to 3 miles) 14,400 0.4 km (1/4-mile) * Longer distances are possible with lower baud rates and if the wire is not routed near noisy sources, such as fluorescent lights and power lines.
Leased Line Modem The MultiModemV32L unit successfully passed application tests with Metasys Releases 2.02, 3.x, and 4.0. The MultiModemII (MT1432) unit successfully passed application tests with Metasys Release 4.0. The MultiModemII (MT2834) unit successfully passed application tests with Metasys Release 7.0. Other leased line modems may also work with these applications. Refer any quality or operation problems of the modem to the manufacturer.
IMPORTANT: None of these modems was qualified per Johnson Controls environmental or noise quality standards, and are not guaranteed to work in other applications.
Public Carrier Leased Line Compatibility The modems can be connected to 2-wire or 4-wire unconditioned private lines. The 4-wire application is more common. Refer to the Ordering a Leased Line section for general specifications. 12 Leased Line Modem Application Note
Detailed Procedures
Configuring the Modems To configure the MultiModemV32L unit or the MultiModemII unit, you need a dumb terminal, or a terminal program such as Windows® Terminal program or ProComm Plus program running on the OWS. Connect a straight-through cable between the modem and the terminal while configuring. Leave the modem’s jumper settings (inside) to the factory default positions.
Configuring the MultiModemV32L Unit Configuring the MultiModemV32L unit depends on which application you are using: remote OWS, remote printer, or remote N2 Bus.
Using the Remote Operator Workstation Application To configure the MultiModemV32L unit: 1. Set the terminal to the following to enable it to configure the modems: 9600 baud, 0 or no parity, 8 data bits, 1 stop bit, half duplex 2. Set the modem’s switches (located on the bottom) to the following to enable it for configuration, using Table 5 and Table 6:
Table 5: 4-Position Switch Block 4-Position Switch Block Position 1 Down 2 Down 3 Down 4 Down Leased Line Modem Application Note 13
Table 6: 8-Position Switch Block 8-Position Switch Block Position 1 Up 2 Up (2-wire) or Down (4-wire) 3 Up 4 Down 5 Up 6 Up 7 Up 8 Down
3. Disconnect the leased line from the back of the modem, after setting the modem’s switches to enable it for programming. 4. Set the modems to 9600 baud, type the following commands, pressing Enter after each: AT&W1&F
5. Cycle power on the modem. Type the following command and press Enter: ATL5 A list of parameters displays. Verify the following parameters are in the list: E0, Q1, &E1, $MBxxxx, $SByyyy, $BAz, &W0 where: xxxx and yyyy = baud rate selected z = 1 for 9600 baud; 0 for any other baud rate If any of these parameters are incorrect, check the switch settings, reenter the command in Step 4, and verify. 6. Type the following command and press Enter: ATL7 Another parameter list displays. Verify that this list contains the following parameters: &BS0, Y1, $MBxxxx, $SByyyy, $BAz, &W0 where: xxxx and yyyy and z = see Step 5 Again, if any of these parameters is incorrect, check the switch settings, reenter the command in Step 4, and verify. After verifying that the modem is properly programmed, reconnect the leased line to the modem. 7. Type the following command and press Enter: ATS18? The response to this command should be 255. If not, reenter the command in Step 4 and verify. Leased Line Modem Application Note 15
8. (Optional)Specify the dialback number at the OWS’s modem (i.e., the originate modem) by typing the following command and pressing Enter, if you want to use the dialback feature: For touchtone: ATDT
Table 7: 4-Position Switch Block for Originate/Answer Modems Originate Modem Answer Modem (OWS Side; 4-Position Switch Block) (NCM Side) Switch Position Switch Position 1 Down 1 Down 2 Down 2 Down 3 Down 3 Down 4 Down 4 Down 16 Leased Line Modem Application Note
Table 8: 8-Position Switch Block for Originate/Answer Modems Originate Modem Answer Modem (OWS Side; 8-Position Switch Block) (NCM Side) Switch Position Switch Position 1 Up 1 Up 2 Up (2-wire) or 2 Up (2-wire) or Down (4-wire) Down (4-wire) 3 Up 3 Up 4 Down 4 Down 5 Down 5 Up 6 Up 6 Up 7 Up 7 Up 8 Up 8 Up
The next step is to prepare the modem cables. Refer to Installing the Modems, Using the Remote Operator Workstation Application section.
Using the Remote Printer Application To configure the MultiModemV32L unit: 1. Set the terminal to the following to enable it to configure the modems: 9600 baud, 0 or no parity, 8 data bits, 1 stop bit, half duplex 2. Set the modem’s switches (located on the bottom) to the settings listed in Table 9 or Table 10 to enable it for configuration:
Table 9: MultiModemV32L Unit 4-Position Switch Block 4-Position Switch Block Position 1 Down 2 Down 3 Down 4 Down Leased Line Modem Application Note 17
Table 10: MultiModemV32L Unit 8 Position Switch Block 8-Position Switch Block Position 1 Up 2 Up (2-wire) or Down (4-wire) 3 Up 4 Down 5 Up 6 Up 7 Up 8 Down
3. Disconnect the leased line from the back of the modem, after setting the modem’s switches to enable it for programming. 4. Set the modems to 9600 baud, type the following commands, pressing Enter after each: AT&W1&F
If any of these parameters are incorrect, check the switch settings, reenter the command in Step 4, and verify. 6. Type the following command and press Enter: ATS18? The response to this command should be 255. If not, reenter the command in Step 4 and verify. After verifying that the modem is properly programmed, reconnect the leased line to the modem. 7. (Optional)Specify the dialback number at the printer’s modem (i.e., the originate modem) by typing the following command and pressing Enter, if you want to use the dialback feature: For touchtone: ATDT
Table 11: MultiModemV32L Unit 4-Position Operational Settings Originate Modem Answer Modem (Printer Side; 4-Position (NCM Side) Switch Block) Switch Position Switch Position 1 Down 1 Down 2 Down 2 Down 3 Down 3 Down 4 Down 4 Down Leased Line Modem Application Note 19
Table 12: MultiModemV32L Unit 8-Position Operational Settings Originate Modem Answer Modem (Printer Side; 8-Position (NCM Side) Switch Block) Switch Position Switch Position 1 Up 1 Up 2 Up (2-wire) or Down 2 Up (2-wire) or (4-wire) Down (4-wire) 3 Up 3 Up 4 Down 4 Down 5 Down 5 Up 6 Up 6 Up 7 Up 7 Up 8 Up 8 Up
The next step is to prepare the modem cables. Refer to Using the Remote Printer Application section.
Using the Remote N2 Bus Application To configure the MultiModemV32L unit: 1. Set the terminal to the following to enable it to configure the modems: 9600 baud, 0 or no parity, 8 data bits, 1 stop bit, half duplex 2. Set the modem’s switches (located on the bottom) to the following to enable it for configuration (Refer to Table 13 and Table 14):
Table 13: MultiModemV32L Unit 4-Position Configuration Settings 4-Position Switch Block Position 1 Up 2 Down 3 Up 4 Down 20 Leased Line Modem Application Note
Table 14: MultiModemV32L Unit 8-Position Configuration Settings 8-Position Switch Block Position 1 Down 2 Up (2-wire) or Down (4-wire) 3 Up 4 Down 5 Up 6 Down 7 Down 8 Down
3. Disconnect the leased line from the back of the modem, after setting the modem’s switches to enable it for programming. 4. Type the following commands at the terminal for each modem, pressing Enter after each: AT&W1&F
7. Type the following command and press Enter: ATS18? The response to this command should be 255. If not, reenter the command in Step 4 and verify. 8. (Optional)Specify the dialback number at the NCM’s modem (i.e., the originate modem) by typing the following command and pressing Enter, if you want to use the dialback feature: For touchtone: ATDT
Table 15: MultiModemV32L Unit 4-Position Switch Block Settings Originate Modem Answer Modem (NCM; 4-Position Switch Block) (N2 Device Side) Switch Position Switch Position 1 Up 1 Up 2 Down 2 Down 3 Up 3 Up 4 Down 4 Down 22 Leased Line Modem Application Note
Table 16: MultiModemV32L Unit 8-Position Switch Block Settings Originate Modem Answer Modem (NCM Side; 8-Position (N2 Device Side) Switch Block) Switch Position Switch Position 1 Down 1 Down 2 Up (2-wire) or 2 Up (2-wire) or Down (4-wire) Down (4-wire) 3 Up 3 Up 4 Down 4 Down 5 Down 5 Up 6 Down 6 Down 7 Down 7 Down 8 Up 8 Up
The next step is to prepare the modem cables. Refer to Installing the Modems, Using the Remote N2 Bus Application section.
Configuring the MultiModemII (MT1432A) Unit Configuring the MultiModemII (MT1432) unit depends on which application you are using: remote OWS, remote printer, or remote N2 Bus. Note: If you are configuring the MultiModemII (MT1932 or MT2834) unit, refer to the section, Configuring the MultiModemII (MT1932 and MT2834) Unit.
Using the Remote Operator Workstation Application To configure the MultiModemII (MT1432) unit: 1. Set the terminal to the following to enable it to configure the modems: 9600 baud, 0 or no parity, 8 data bits, 1 stop bit, half duplex 2. Set the modem’s switches (located on the side) to the following to enable it for configuration: Leased Line Modem Application Note 23
Table 17: MultiModemII MT1432 Unit Switch Settings Switch Position 1 Up 2 Up 3 Down 4 Up 5 Up 6 Up 7 Up 8 Down 9 Down 10 Up 11 Up 12 Down 13 Up 14 Up 15 Up 16 Up (2-wire) or Down (4-wire)
3. Disconnect the leased line from the back of the modem, after setting the modem’s switches to enable it for programming. 4. Set the modem’s serial port to 9600 bps and the modem’s leased line to 14.4 Kbps, type the following commands, pressing Enter after each: AT&W1&F
5. Cycle power on the modem. Type the following command and press Enter: ATL5 A list of parameters displays. Verify the following parameters are in the list: E0, Q1, &E1, $SBxxxx, &W0 where: xxxx = baud rate selected If any of these parameters are incorrect, check the switch settings, reenter the command in Step 4, and verify. 6. Cycle power on the modem. Type the following command and press Enter: ATL7 A list of parameters displays. Verify the following parameters are in the list: &BS0, Y1, $SBxxxx, &W0 where: xxxx = baud rate selected If any of these parameters is incorrect, reenter the commands in Step 4 and verify. After verifying that the modem is properly programmed, reconnect the leased line to the modem. 7. Type the following command and press Enter: ATS18? The modem should respond with 255. If not, reenter the commands in Step 4 and verify. 8. (Optional)Specify the dialback number at the OWS’s modem (i.e., the originate modem) by typing the following command and pressing Enter, if you want to use the dialback feature: For touchtone: ATDT
9. Type the following command and press Enter: ATL The phone number you entered should be listed under Register 9 (N9). If the number is incorrect, reenter the command in Step 8 and verify. 10. Change the MultiModemII (MT1432) switches to operational settings as shown in Table 18 to make the OWS modem the originate modem and the NCM (or JC/85 Gateway NCM) modem the answer modem, after configuring the MultiModemII (MT1432) unit.
Table 18: MultiModemII MT1432 Unit Originate/Answer Settings Originate Modem Answer Modem (OWS Side; 16-Position (NCM Side; 16-Position Switch Block) Switch Block) Switch Position Switch Position 1 Up 1 Up 2 Up 2 Up 3 Down 3 Down 4 Up 4 Up 5 Down 5 Up 6 Up 6 Up 7 Up (NCM) 7 Up (NCM) Down (JC/85 Gateway NCM) Down (JC/85 Gateway NCM) 8 Up 8 Up 9 Down 9 Down 10 Down 10 Down 11 Up 11 Up 12 Down 12 Down 13 Up 13 Up 14 Up 14 Up 15 Up 15 Up 16 Up (2-wire) or 16 Up (2-wire) or Down (4-wire) Down (4-wire)
The next step is to prepare the modem cables. Refer to Using the Remote Operator Workstation Application section. 26 Leased Line Modem Application Note
Using the Remote Printer Application To configure the MultiModemII (MT1432, MT1932, or MT2834) unit: 1. Set the terminal to the following to enable it to configure the modems: 9600 baud, 0 or no parity, 8 data bits, 1 stop bit, half duplex 2. Set the modem’s switches (located on the side) to the following to enable it for configuration:
Table 19: MultiModemII Unit Configuration Settings Switch Position 1 Up 2 Down 3 Down 4 Up 5 Up 6 Up 7 Up 8 Down 9 Down 10 Up 11 Up 12 Down 13 Up 14 Up 15 Up 16 Up (2-wire) or Down (4-wire)
3. After setting the modem’s switches to enable it for programming, disconnect the leased line from the back of the modem. 4. Set the modem’s serial port to 9600 bps and the modem’s leased line to 9600 bps, type the following commands, pressing Enter after each: AT&W1&F
If you want to set the modem’s serial port to some other acceptable baud rate (300, 600, 1200, etc.), type the following command, specifying the baud rate in place of xxxx. Press Enter. AT$SBxxxx&W0 If the modem is not communicating properly, drop the leased line baud rate to 9600 (or less) by typing the following command at the terminal and pressing Enter: AT$MB9600&W0 Then, set Switches 13 and 14 (baud rate) appropriately. (See the owner’s manual.) 5. Cycle power on the modem. Type the following command and press Enter: ATL5 A list of parameters displays. Verify the following parameters are in the list: E0, Q1, &E1, &E5, &E7, $SBxxxx, &W0 where: xxxx and yyyy = baud rate selected If any of these parameters are incorrect, check the switch settings, reenter the command in Step 4, and verify. 6. Type the following command and press Enter: ATS18? The modem should respond with 255. If not, reenter the commands in Step 4 and verify. After verifying that the modem is properly programmed, reconnect the leased line to the modem. 7. (Optional) If you want to use the dialback feature, specify the dialback number at the printer’s modem (i.e., the originate modem) by typing the following command and pressing Enter: For touchtone: ATDT
8. Type the following command and press Enter: ATL The phone number you entered should be listed under Register 9 (N9). If the number is incorrect, reenter the command in Step 7 and verify. 9. After configuring the MultiModemII (MT1432, 1932, or MT2834) unit, change its switches to operational settings as shown in Table 20 to make the printer modem the originate modem and the NCM modem the answer modem.
Table 20: MultiModemII Unit Originate/Answer Settings Originate Modem Answer Modem (Printer Side; 16-Position (NCM Side) Switch Block) Switch Position Switch Position 1 Up 1 Up 2 Down 2 Down 3 Down 3 Down 4 Up 4 Up 5 Down 5 Up 6 Up 6 Up 7 Up 7 Up 8 Up 8 Up 9 Down 9 Down 10 Up 10 Up 11 Up 11 Up 12 Down 12 Down 13 Up 13 Up 14 Up 14 Up 15 Up 15 Up 16 Up (2-wire) or 16 Up (2-wire) or Down (4-wire) Down (4-wire)
The next step is to prepare the modem cables. Refer to Using the Remote Printer Application section. Leased Line Modem Application Note 29
Using the Remote N2 Bus Application To configure the MultiModemII (MT1432) unit: 1. Set the terminal to the following to enable it to configure the modems: 9600 baud, 0 or no parity, 8 data bits, 1 stop bit, half duplex 2. Set the modem’s switches (located on the side) to the following to enable it for configuration:
Table 21: MultiModemII MT1432 Unit Configuration Settings Switch Position 1 Down 2 Up 3 Down 4 Up 5 Up 6 Up 7 Down 8 Down 9 Down 10 Up 11 Up 12 Down 13 Down 14 Up 15 Down 16 Up (2-wire) or Down (4-wire)
3. After setting the modem’s switches to enable it for programming, disconnect the leased line from the back of the modem. 4. Set the modem’s serial port to 9600 bps and the modem’s leased line to 14.4 Kbps, type the following commands, pressing Enter after each: AT&W1&F
5. Cycle power on the modem. Type the following command and press Enter: ATL5 A list of parameters displays. Verify the following parameters are in the list: E0, Q1, &E0, $MB9600, $SB9600, &W0 If any of these parameters are incorrect, check the switch settings, reenter the command in Step 4, and verify. 6. Cycle power on the modem. Type the following command and press Enter: ATL7 A list of parameters displays. Verify the following parameters are in the list: Y1, $MB9600, $SB9600, &W0 If any of these parameters is incorrect, check the switch settings, reenter the four commands in Step 4, and verify. After verifying that the modem is properly programmed, reconnect the leased line to the modem. 7. Type the following command and press Enter: ATS18? The modem should respond with 255. If not, reenter the four commands in Step 4 and verify. 8. (Optional) If you want to use the dialback feature, specify the dialback number at the NCM’s modem (i.e., the originate modem) by typing the following command and pressing Enter: For touchtone: ATDT
9. Type the following command and press Enter: ATL The phone number you entered should be listed under Register 9 (N9). If the number is incorrect, reenter the command in Step 8 and verify. 10. After configuring the MultiModemII (MT1432) unit, change its switches to operational settings as shown in Table 22 to make the NCM modem the originate modem and the N2 device modem the answer modem.
Table 22: MultiModemII (MT1432) Unit Originate/Answer Settings Originate Modem Answer Modem (NCM Side; 16-Position Switch Block) (N2 Device Side) Switch Position Switch Position 1 Down 1 Down 2 Up 2 Up 3 Down 3 Down 4 Up 4 Up 5 Down 5 Up 6 Up 6 Up 7 Down 7 Down 8 Up 8 Up 9 Down 9 Down 10 Up 10 Up 11 Up 11 Up 12 Down 12 Down 13 Down 13 Down 14 Up 14 Up 15 Down 15 Down 16 Up (2-wire) or 16 Up (2-wire) or Down (4-wire) Down (4-wire)
The next step is to prepare the modem cables. Refer to Using the Remote N2 Bus Application section. 32 Leased Line Modem Application Note
Configuring the MultiModemII (MT1932 and MT2834) Unit Configuring the MultiModemII (MT1932 and 2834) unit depends on which application you are using: remote OWS, remote printer, or remote N2 Bus.
Using the Remote Operator Workstation Application To configure the MultiModemII (MT1932 or MT2834) unit: 1. Set the terminal to the following to enable it to configure the modems: 9600 baud, 0 or no parity, 8 data bits, 1 stop bit, half duplex 2. Make sure the modem’s switches (located on the side) are set to the following default positions as shown in Table 23 to enable it for configuration.
Table 23: MultiModemII (MT1932 and MT2834) Unit Configuration Settings Switch Default Position 1 Up 2 Up 3 Down 4 Up 5 Up 6 Up 7 Down 8 Down 9 Down 10 Up 11 Down 12 Down 13 Up 14 Up 15 Up 16 Up (2-wire) or Down (4-wire)
3. After setting the modem’s switches to enable it for programming, disconnect the leased line from the back of the modem. Note: Default positions are also indicated on the modem label. Leased Line Modem Application Note 33
4. Set the modem’s serial port to 9600 bps and the modem’s leased line to 19.2 Kbps, type the following commands, pressing Enter after each: AT&W1&F
If any of these parameters is incorrect, reenter the commands in Step 4 and verify. If any of these parameters are incorrect, check the switch settings, reenter the command in Step 4, and verify. After verifying that the modem is properly programmed, reconnect the leased line to the modem. 7. Type the following command and press Enter: ATS18? The modem should respond with 255. If not, reenter the commands in Step 4 and verify. 8. (Optional) If you want to use the dialback feature, specify the dialback number at the OWS’s modem (i.e., the originate modem) by typing the following command and pressing Enter: For touchtone: ATDT
Table 24: MultiModemII (MT1932 and MT2834) Unit Originate/Answer Settings Originate Modem Answer Modem (OWS Side; 16-Position (NCM Side; 16-Position Switch Block) Switch Block) Switch Position Switch Position 1 Up 1 Up 2 Up 2 Up 3 Down 3 Down 4 Up 4 Up 5 Down 5 Up 6 Up 6 Up 7 Up (NCM) 7 Up (NCM) Down (Gateway NCM) Down (Gateway NCM) 8 Up 8 Up 9 Down 9 Down 10 Down 10 Down 11 Up 11 Up 12 Down 12 Down 13 Up 13 Up 14 Up 14 Up 15 Up 15 Up 16 Up (2-wire) or 16 Up (2-wire) or Down (4-wire) Down (4-wire)
The next step is to install the modem. Refer to Using the Remote Operator Workstation Application section.
Using the Remote Printer Application The steps for configuring the MultiModemII (MT1932 or MT2834) unit for the remote printer application are the same as for the MT1432 model. Refer to the Configuring the MultiModemII (MT1432) Unit, Using the Remote Printer Application section.
Using the Remote N2 Bus Application The configuration setup for the MT1932 and MT2834BL 4-wire leased line modem and the MT2834BA 2-wire leased line modem is the same with one exception. When configuring the MT1932 or MT2834BA, ignore the “S18=255” parameter in Step 3. 36 Leased Line Modem Application Note
To configure the MultiModemII (MT1932 and MT2834) unit: 1. Set the terminal to the following to enable it to configure the modems: 9600 baud, 0 or no parity, 8 data bits, 1 stop bit, half duplex 2. Set the modem’s switches (located on the side) to the following as shown in Table 25 to enable it for configuration:
Table 25: MultiModemII MT1932 and MT2834 Unit Configuration Settings Switch Position 1 Up 2 Up 3 Down 4 Up 5 Up 6 Up 7 Down 8 Down 9 Down 10 Up 11 Down 12 Down 13 Down 14 Down 15 Down 16 Up (2-wire) or Down (4-wire)
3. After setting the modem’s switches to enable it for programming, disconnect the leased line from the back of the modem. 4. Set the modem’s serial port to 9600 bps and the modem’s leased line to 9600 bps, type the following commands, pressing Enter after each: AT&W1&F
5. Cycle power on the modem. Type the following command and press Enter: ATL5 A list of parameters displays. Verify the following parameters are in the list: E0, Q1, &E0, $MB9600, $SB9600, &W0 If any of these parameters is incorrect, check the switch settings, reenter the four commands in Step 4, and verify. 6. Cycle power on the modem. Type the following command and press Enter: ATL7 A list of parameters displays. Verify the following parameters are in the list: Y0, $MB9600, #F0 $SB9600, &W0 If any of these parameters are incorrect, check the switch settings, reenter the command in Step 4, and verify. After verifying that the modem is properly programmed, reconnect the leased line to the modem. 7. Type the following command and press Enter: ATS18? The modem should respond with 255. If not, reenter the four commands in Step 4 and verify. 8. (Optional) If you want to use the dialback feature, specify the dialback number at the NCM’s modem (i.e., the originate modem) by typing the following command and pressing Enter: For touchtone: ATDT
9. Type the following command and press Enter: ATL The phone number you entered should be listed under Register 9 (N9). If the number is incorrect, reenter the command in Step 8 and verify. 10. After configuring the MultiModemII (MT 1932 and MT2834) unit, change its switches to operational settings as shown in Table 26 to make the NCM modem the originate modem and the N2 device modem the answer modem.
Table 26: MultiModemII (MT1932 and MT2834) Unit Operational Settings Originate Modem Answer Modem (NCM Side; 16-Position Switch Block) (N2 Device Side) Switch Position Switch Position 1 Down 1 Down 2 Up 2 Up 3 Down 3 Down 4 Up 4 Up 5 Down 5 Up 6 Up 6 Up 7 Down 7 Down 8 Up 8 Up 9 Down 9 Down 10 Down 10 Down 11 Up 11 Up 12 Down 12 Down 13 Down 13 Down 14 Down 14 Down 15 Down 15 Down 16 Up (2-wire) or 16 Up (2-wire) or Down (4-wire) Down (4-wire)
The next step is to install the modem. Refer to Using the Remote N2 Bus Application section. Leased Line Modem Application Note 39
Using Commissioning Procedures
Verifying Modems are Working When the modems are working properly, the TR and CD lights are on steady, and the appropriate baud rate lights are on (remote N2 application) or flashing (remote OWS or printer application; MultiModemV32L unit only). Also, the SD and RD lights are blinking to indicate that data is being transferred. If any of the lights are not working in these ways, refer to the Troubleshooting Procedures section for assistance.
Checking the Dialback Line If you are using the dialback line, verify its operation. Force the modem to switch to the dialback line by pressing down and releasing the Voice/Data switch on the originate modem and disconnecting the leased line. The originate modem disconnects from the answer modem and calls the modem on the dialback line. If the modem on the dialback line does not answer within the prescribed time period, the originate modem defaults to the modem on the leased line. To return the modem to leased line operation, reconnect the leased line and press the Voice/Data switch down again. The originate modem disconnects from the modem on the dialback line and reconnects to the modem on the leased line. At this point, a communication bug in the modem may cause an interruption in communication. (For details, refer to the Troubleshooting Procedures section.) To verify the bug is cleared and the modem reset, simply cycle power on the originate modem. If for any reason you press down on the Voice/Data switch on the answer modem, the answer modem disconnects the line that is currently being used. The originate modem then attempts communication over the leased line first, then the dialback line. The modem continues to toggle between the 2 lines until it makes a connection. 40 Leased Line Modem Application Note
Installing the Modems After you have configured the modems, the next step is to prepare and connect modem cables. Which cables to prepare and how to connect them depends on which application you are using: remote OWS, remote printer, or remote N2 Bus. Refer to the sections that follow.
Using the Remote Operator Workstation Application To make the modem cables: 1. Prepare the cable that connects between the serial port and the modem, if you are using the NCM’s RS-232 serial port. For the NCM101/102/401/200, refer to Figure 5. For the NCM300, refer to Figure 6. Because of the recessed connector on the NCM101/102/401/200, a special right-angle cable with a narrow profile shell is required to attach to the RS-232 port (NU-CBL101-0). Connect the pigtailed wires of this cable into a separately ordered hood (MHK101). Note: For additional information on the NCM300, refer to the Network Control Module 300 Series Technical Bulletin (LIT-6360251). NCM RS-232 Port Modem (male) (male) 1 FG 1 In 2 TD Black 2 In RD Brown Out 3 3 Out RTS Red In 4 4 In CTS Orange Out 5 5 Out Out 6 DSR Yellow 6 Out 7 SG Green 7 DCD Blue Out 8 8 Out 18 DCE DCD Violet 18 In DTR White 20 20 In
NCPT-MOD
Figure 5: Cable Between NCM101/102/401/200’s RS-232 Port and Modem (NU-CBL101-0) Leased Line Modem Application Note 41
Modem NCM300 or System Adapter 9-pin Female 25-pin Male Shell Shell
DCD In 1 In 2 RD 2 In Out 3 TD 3 Out Out 4 DTR 4 In 5 SG 5 Out In 6 DSR 6 Out Out 7 RTS 7 CTS In 8 8 Out 9 NC 20 In
NC3FIG9
Figure 6: Cable Between NCM300’s Port 2 (RS-232) and Modem If you are using the RS-232 submodule, prepare the RS-232 cable (NU-CBL101-0) shown in Figure 7. This cable connects between the submodule and modem.
RS-232 Submodule Modem (male) (male)
Shell In 1 FG Out 2 TD Black 2 In In 3 RD Brown 3 Out Out 4 RTS Red 4 In In 5 CTS Orange 5 Out In 6 DSR Yellow 6 Out 7 SG Green 7 In 8 DCD Blue 8 Out Out 18 Unused Violet 18 In Out 20 DTR White 20 In
RS2-MOD1
Figure 7: Cable Between NCM’s RS-232 Submodule and Modem (NU-CBL101-0) 42 Leased Line Modem Application Note
2. Prepare the RS-232 cable that connects between the PS/2 OWS and the modem (if you have a PS/2). The pinouts are shown in Figure 8. PS/2 Operator Workstation Modem (male) Allied Part No. CON94-3870-10 (male) Shell In 1 FG Out 2 TD Black 2 In In 3 RD Brown 3 Out Out 4 RTS Red 4 In In 5 CTS Orange 5 Out In 6 DSR Yellow 6 Out 7 SG Green 7 In 8 DCD Blue 8 Out In Out 18 Unused Violet 18 Out In 20 DTR White 20
RS2-MOD2
Figure 8: Cable Between PS/2 Operator Workstation and Modem If you have a Compaq Deskpro or Compaq portable, prepare the RS-232 cable that connects between the Compaq or portable Workstation and the modem. The pinouts are shown in Figure 9. Compaq or Portable Workstation Modem (9-pin female) Allied Part No. CON94-3856-6 (25-pin male)
In 1 2 In In 2 3 Out Out 3 4 In Out 4 5 Out COM 5 6 Out In 6 7 Out 7 8 Out In 8 20 In In 9 22 Out
FG Shell Shell
PORT-MOD
Figure 9: Cable Between Compaq or Portable Workstation and Modem Leased Line Modem Application Note 43
Preparing Modem Cables for JC/85 Gateway If you are using the leased line modems for a JC/85 Gateway application, prepare the cable required to connect the JC/85/40 minicomputer (CPU-101/-110/-112) and the leased line modem (either model) See Figure 10. JC/85/40 CPU-101/110/112 MultiTech PCA-110 Leased Line Modem (male) (male) 1 FG 1 Out 2 TD Black 2 In In 3 RD Brown 3 Out In 4 CTS Red 5 Out Out 5 RTS Orange 4 In Out 6 DTR Yellow 20 In 7 SG Green 7 In 12 Speed Blue 12 16 Unused Violet 13 In 20 DSR Gray 6 Out In 22 Out DCD White 8
Cable Application No. C02.M06 CABLE1
Figure 10: Cable Between JC/85/40 CPU-101/110/112 and Modem To prepare the modem cables: 1. Prepare the cable required to connect the JC/85/40 minicomputer (CPU-111/-113) and the leased line modem (either model) as shown in Figure 11. 44 Leased Line Modem Application Note
JC/85/40 CPU-111/113 MultiTech 2/4 Channel Leased Line Modem (male) (male) 1 FG 1 Out 2 TD Black 2 In RD Brown In 3 3 Out RTS Red Out 4 4 In CTS Orange In 5 5 Out DSR Yellow In 6 8 Out 7 SG Green 7 DCD Blue In 8 6 Out Out 20 DTR Violet 20 In 14 Unused Gray 14 13 Unused White 13 Cable Application No. C03.M02 CABLE2
Figure 11: Cable Between JC/85/40 CPU-111/113 and Modem 2. Prepare the cable required between the JC/85 Gateway NCM and the leased line modem (either model) as shown in Figure 12.
JC/85 Gateway NCM MultiTech (RS-232 Submodule) Leased Line Modem (male) (male)
1 FG Shell TD Black Out 2 2 In In 3 RD Brown 3 Out RTS Red Out 4 4 In CTS Orange In 5 5 Out DSR Yellow In 6 6 Out SG Green 7 7 DCD Blue In 8 8 Out Unused Violet 18* 18* DTR White Out 20 20 In Cable Application No. C07.M07
* If you are using MultiTech MultiModem V32L, cut Pin 18 at the modem end. CABLE3
Figure 12: Cable Between JC/85 Gateway NCM and Modem Leased Line Modem Application Note 45
RS-232 Note: For NCM300, RS-232 connection is made at Port 2. Operator Port (RS-232 port). Workstation Modem Modem
To Power To Power (either or) Serial
RS-232 Submodule To Dialback Line To Dialback Line RESET Port To Leased Line To Leased Line NCM (or Dedicated Line) (or Dedicated Line) OWSCONN
Figure 13: Connecting the Cables for Remote Operator Workstation
Connecting the Cables To connect the cables, referring to Figure 13. 1. Connect the serial port and the modem with the cable shown in Figure 5, if you are using the NCM’s RS-232 serial port. (For the NCM300, connect the cable shown in Figure 6 between the NCM’s Port 2 and the modem.) If you are using the RS-232 submodule, connect the cable shown in Figure 7 between the submodule and the modem. 2. Connect the RS-232 cable between the modem and the OWS’s serial port (i.e., same serial port used for direct connect). The RS-232 cable is shown in Figure 5 or Figure 7. 3. Plug in one end of the RJ11 cable for the leased line into the Leased Line connector, for each modem, and the other end into the modular phone jack provided by the telephone company. If you are using dedicated wire instead of leased line, route and terminate the dedicated wire to the Leased Line connector. 4. (Optional)Plug in one end of the RJ11 cable for the standard telephone line into the Dial Line connector, and the other end into the modular phone jack provided by the telephone company, if you are using the dialback feature. Do this for each modem. 5. Plug the AC power transformer into the Power connection, for each modem. Turn on the modems by flipping the On/Off switch to On. The modems now run diagnostic self-tests. (The speed indicators flash.) If the OWS and the NCM are on, the TR light and one or more of the baud rate lights come on. Then, after about 30 seconds, the CD light goes on, and the appropriate baud rate lights flash (MultiModemV32L unit) or go on steady (MultiModemII unit). If these lights remain off, refer to the modem owner’s manual. 46 Leased Line Modem Application Note
Using the Remote Printer Application
Preparing Modem Cables To make the modem cables. 1. Prepare the cable that connects between the serial port and the modem, if you are using the NCM’s RS-232 serial port. For the NCM101/102/401/200, refer to Figure 5. For the NCM300, refer to Figure 6. Because of the recessed connector on the NCM101/102/401/200, a special right-angle cable with a narrow profile shell is required to attach to the RS-232 port (NU-CBL101-0). Connect the pigtailed wires of this cable into a separately ordered hood (MHK101). If you are using the RS-232 submodule, prepare the RS-232 cable (NU-CBL101-0) shown in Figure 7. This cable connects between the submodule and modem. 2. Prepare the RS-232 cable that connects between the modem and the printer (Figure 14). This is a straight-through, 25-to-25 pin cable. A minimum of Pins 2, 3, 4, 5, 6, 7, 8, and 20 is required.
Modem IBM R Proprinter III (male) (male; MHK 101) 1 FG Shell In 2 TD Black 2 Out Out 3 RD Brown 3 In In 4 RTS Red 4 Out Out 5 CTS Orange 5 In Out 6 DSR Yellow 6 In 7 SG Green 7 Out 8 DCD Blue 8 In 18 Unused Violet 18 In 20 DTR White 20 Out
MOD-PRT Figure 14: Cable Between Modem and Printer (NU-CBL101-0) Connecting the Cables To connect the cables, referring to Figure 14. 1. Connect the cable shown in Figure 5 between the serial port and the modem, if you are using the NCM’s RS-232 serial port,. (For the NCM300, connect the cable shown Figure 6 between the NCM’s Port 2 and the modem.) If you are using the RS-232 submodule, connect the cable shown in Figure 7 between the submodule and the modem. Leased Line Modem Application Note 47
2. Connect the RS-232 cable shown in Figure 14 between the printer and the modem. 3. Plug in one end of the RJ11 cable for the leased line into the Leased Line connector, and the other end into the modular phone jack provided by the telephone company, for each modem. If you are using dedicated wire instead of leased line, route and terminate the dedicated wire to the Leased Line connector. 4. (Optional)Plug in one end of the RJ11 cable for the standard telephone line into the Dial Line connector, and the other end into the modular phone jack provided by the telephone company, if you are using the dialback feature. Do this for each modem. 5. Plug the AC power transformer into the Power connection, for each modem. Turn the modems on. The modems now run diagnostic self-tests. (The speed indicators flash.) If the printer and the NCM are on, the TR light and one or more of the baud rate lights come on. Then, after about 30 seconds, the CD light goes on, and the appropriate baud rate lights flash (MultiModemV32Lunit ) or go on steady (MultiModemII unit). If these lights remain off, refer to the modem owner’s manual. Note: For NCM300, RS-232 connection is made at Port 2. RS-232 (RS-232 port). Printer Port Modem Modem
To Power To Power (either or) Serial
To Dialback Line To Dialback Line RS-232 Submodule
RESET To Leased Line To Leased Line Port (or Dedicated Line) (or Dedicated Line) prntconn NCM
Figure 15: Connecting the Cables for Remote Printer 48 Leased Line Modem Application Note
Using the Remote N2 Bus Application
B & B RS-232 to RS-485 Converter Follow these instructions to use the RS-232 to RS-485 converter (Model 485TBLED manufactured by B & B Electronics): There are two jumpers on the B & B converter (Figure 16). 1. Insert one jumper in the CONTROL SD location and insert the other jumper in the ECHO OFF location. The SD position causes a timed internal Request to Send (RTS) signal to be generated when the TD signal is active. 2. Insert an external 100 ohm resistor between the GND terminal and the N2 cable reference wire. Note: The external power supply common is also connected to the GND terminal. No connection is made to the FR GND SHIELD terminal on the B & B converter. 3. Connect Terminals TD(A) and RD(A) together with an external jumper wire: This is the N2- line connection point. Connect Terminals TD(B) and RD(B) together with an external jumper wire. This is the N2+ connection point.
FR.GND TB1 SHIELD TD(A) TD(B) B & B Electronics RD(A) RS-232 to RS-485 N2- RS-232 Converter RS-485 RD(B) N2+ Model 485TBLED GND REF. +12VDC 100 ohm C6 R9 ECHO CONTROL OFF RTS ON SD
485PS2
bbcvt
Figure 16: B & B Electronics Converter and Power Supply Leased Line Modem Application Note 49
There is no need for an End-of-Line Resistor (EOLR) when using the B & B converter. B & B converters produce an N2 bias, which exceeds the 0.4 V stated in the Troubleshooting Procedures section of the N2 Communications Bus Technical Bulletin (LIT-636018). The Metasys system devices already provide the necessary N2 drive power. If you exceed 32 devices on either the remote or the local trunk, insert an N2 repeater after 32 devices instead of after the normal 50 devices. For more information on the N2, refer to the N2 Communications Bus Technical Bulletin (LIT-636018). Note: When baseframe equipment (DCM, XRE, XRL, XRM, XBN) is used at the remote end, special timing is required on the converter that attaches to that equipment. The converter turnaround time must be faster to work with these devices. Resistor R9 must be changed from the standard 100 K ohm to a 68 K ohm, 1%, 1/8 watt resistor. B & B Electronics provides this change. Order a “*modification line item: change R9 to a 68 K ohm, 1% resistor” when placing your order.
Preparing Modem Cables To make the modem cables: 1. Prepare the RS-232 cable that connects between the RS-232 submodule and the modem, if you are using the NCM’s RS-232 submodule. The pinouts are shown Figure 17. Because of the recessed connector on the NCM, a special right-angle cable with a narrow profile shell is required to attach to the RS-232 port (NU-CBL101-0). Connect the pigtailed wires of this cable into a separately ordered hood (MHK101). 50 Leased Line Modem Application Note
RS-232 Submodule Modem (male) (male)
Shell In 1 FG Out 2 TD Black 2 In In 3 RD Brown 3 Out Out 4 RTS Red 4 In In 5 CTS Orange 5 Out In 6 DSR Yellow 6 Out 7 SG Green 7 In 8 DCD Blue 8 Out Out 18 Unused Violet 18 In Out 20 DTR White 20 In
RS2-MOD1
Figure 17: Cable Between NCM’s RS-232 Submodule and Modem (NU-CBL101-0) 2. Prepare the RS-232 cable that connects between the RS-232-to-N2 Bus converter and the modem, if you are using the N2 converter. The pinouts are shown in Figure 18.
Modem Converter (male) (male)
1 FG 1 In 2 TD Black 2 In Out 3 RD Brown 3 Out 4 4 In 7 SG 7
MOD-CNTR
Figure 18: Cable Between Converter and Modem (NU-CBL101-0) Leased Line Modem Application Note 51
Connecting the N2 Bus and Modems Follow these instructions, referring to Figures 17, 18, and 19. 1. Connect the RS-232 cable that is shown in Figure 17 between the submodule and the modem, if you are using the RS-232 submodule. If you are not using the RS-232 submodule, wire the N2 Bus between the Communication Terminal Board (TBC) on the NCU (or N2 terminal block on the NCM300) and the converter (Figures 20 and 21). 2. Connect the RS-232 cables shown in Figure 18 between the modem and the converter. 3. Connect the converter to the N2 Bus. 4. Plug in one end of the RJ11 cable for the leased line into the Leased Line connector, and the other end into the modular phone jack provided by the telephone company, for each modem. If you are using dedicated wire instead of leased line, route and terminate the dedicated wire to the Leased Line connector. 5. (Optional)Plug in one end of the RJ11 cable for the standard telephone line into the Dial Line connector, and the other end into the modular phone jack provided by the telephone company, if you are using the dialback feature. Do this for each modem. 6. Plug the AC power transformer into the Power connection, for each modem. Turn the modems on. 7. Plug the power transformer into a power connection, for each converter. After power up, the modems run a diagnostic self-test. (The speed indicators flash.) The TR light and the 96 light go on. Then, after about 30 seconds, the CD light goes on and the 96 light remains on. If these lights remain off, refer to the modem owner’s manual. ! CAUTION: Turn off the modem’s power before disconnecting the leased line from the modem. Otherwise, the modem will send out unintelligible data that may adversely affect N2 communications. 52 Leased Line Modem Application Note
93 0hm Terminator Cap
N2 Bus Note: For NCM300, N2 connection is made at its N2 terminal block,
not at the TBC.
S 2 3 2 RS-
485TBLED ( TER ER M CO
485 RS- TO 232 TBC RS- Converter ch Con ho Ec On f Of +12VDC GND B) TD( A) RD( B) TD( A) TD( ld ie h S FR. tr GND Model 485TBLED ol SD RTS
NCM
232 RS-
485TBLED ( MERTER CO
5 8 4 RS- TO RS-232 Submodule* 232 RS- Converter
Modem Cont ho Ec On f Of
Modem + 12VDC GND B) T D( RD B) T D( A) T D( S hiel d F R. (A) GND r ol SD RTS Model 485TBLED To Power To Power
(either or)
* NCM101/102/401 Only To N2 Bus To Dialback Line To Dialback Line Devices 2-Slot NCU To Leased Line To Leased Line (or Dedicated Line) (or Dedicated Line) N2CONN
Figure 19: Connecting the Cables for Remote N2 Bus RS-232-to-N2 Bus Communication Converter Terminal Board (TBC) 6 3 HRD SFT Note: If shielded wire is used, wire shield to SFT GRD GND GND (soft ground) terminal. To hard ground N2 Bus, 5 2 N2- SFT wire shield to HRD GRD (hard ground). N2 Bus N2+ GND should be hard grounded at only one location, 4 1 preferrably at the NCU. REF For two twisted pair cable, terminate one pair to OUT TB1 (+) and (-), and terminate one or both wires of the other pair to REF. If you terminate one wire to REF, fold back and tape the other wire. N2 OUT (-) TBCWIRE
Figure 20: Wiring N2 Bus Between TBC and Converter NCM300 RS-232-to-N2 Bus
1 2 3 4 5 6 7 8 -ATTE N TION - PLEASE DISCONNEDT BATTERY BE FO RE IN STALL ING ME M OR Y D- Converter 1 R AM
O N
P O W E R
REF REF REF - N2
N2- N2- + N2 N2+ N2+
N2 Bus Termnal Block
2 3 4 5 6 7
C O N F IG .
DANGER
LINE VO LTAG E IN S ID E
NC300WR
Figure 21: Wiring N2 Bus Between NCM300 and Converter Leased Line Modem Application Note 53
Alternate Method for Connecting N2 Bus and Modems There is an alternate method for connecting the N2 Bus and modems that requires the use of a repeater at the remote location. Use this method only if the remote N2 devices (AHU, VAV, UNT, etc.) do not come online, or cycle online and offline. The repeater may be needed when the: • remote side has as few as five devices • N2 Bus length is greater than 500 feet (one way for 18 AWG) • N2 Bus length is greater than 1000 feet (one way for 24 AWG) • N2 Bus is in an electrically noisy environment The method requires the installation of the repeater on the output side of the converter at the remote location. All N2 devices should come online or stop cycling online and offline. Refer to Figure 22.
93 Ohm Terminator Cap N2 Bus Note: For NCM300, N2 connection is made at its N2 terminal block,
not at the TBC.
S 2 3 2 RS-
485TBLED ( TER ER M CO
485 RS- TO 32 2 RS- TBC Converter ch Ec oCo On Of f +12 GND TD( RD( TD( TD( ld ie h S FR. nt VDC B) A) B) A) GND rol SD RTS Model 485TBLED Add repeater here. NCM
RS-232 Submodule*
232 RS-
485TBLED ( MERTER CO
5 8 4 RS- TO Modem Modem 232 RS- Converter Ec oCont ho On Of f +1 GND TD( RD( TD( ld ie TD( h S FR. 2VDC B) A) B) A) GND rol Model 485TBLED To Power To Power SD RTS
(either or) A Repeater * NCM101/102/401 Only To Dialback Line To Dialback Line Side A: EOL In 2-Slot NCU Side B: EOL In To Leased Line To Leased Line B (or Dedicated Line) (or Dedicated Line) To Remote N2 Bus Devices
N2CONN2
Figure 22: Alternate Method of Connecting N2 Bus and Modems For future jobs that meet any of the above criteria, include the cost of the repeater in the estimate. Currently, the recommended repeaters are the Acromag 4683-TTM-1 (115 VAC) and Acromag 4683-TTM-2 (230 VAC). Refer to the N2 Communications Bus Technical Bulletin (LIT- 636018) for installation details. 54 Leased Line Modem Application Note
Troubleshooting Procedures The leased line modem installation requires troubleshooting when communication between the components has been lost. This section contains information that will help you isolate and correct communication problems. To troubleshoot the leased line modem installation, ask yourself the questions that are in Table 27.
Table 27: Troubleshooting the Leased Line Modem Installation Question If No, Action Are the leased lines and dialback Tug on the lines to verify tight lines (optional) at each modem installation. securely connected? Are the modems configured properly Refer to the Configuring the Modems as described in this document? section for configuration details. Are the TR and CD lights on steady? First, determine if the modem is improperly configured. Next, look for loose or bad connections. Last, determine if the modem or leased line is defective. Are the same baud rate lights on for Set the modems to the same baud rate. both modems? Is the baud rate light on steady? First, determine if the modem is (MultiModemII application or remote improperly configured. Next, look for N2 application with MultiModemV32L loose or bad connections. Last, unit) determine if the modem or leased line is defective. Is the baud rate light flashing? (remote OWS or remote Printer application with MultiModemV32L unit) With the modems connected to the First, determine if the modem is Metasys system, are the SD and RD improperly configured. Next, look for lights blinking? loose or bad connections. Last, determine if the modem or leased line is defective.
If you notice that the TR light is on but the CD light is off, check for any loose connections, improper configuration, or a defective modem. Leased Line Modem Application Note 55
Checking for a Defective Modem Follow these steps to check whether a defective leased line modem is causing a communication problem. 1. Force DTR On at both modems by placing Switch 1 of 8 down (MultiModemV32L unit) or Switch 1 down (MultiModemII unit). 2. Set to full duplex the terminal that you used to initially program the modems. 3. Connect a straight-through cable between the terminal and one of the modems. Connect the leased line between the two modems. 4. At the other modem, jumper Pins 2 and 3 on the modem’s DB25 input. 5. Begin typing on the terminal. If the letters you type display, the two modems are communicating over the leased line. If the letters do not display, the modems are not communicating. 6. Replace one of the modems with a working MultiModemV32L unit or MultiModemII unit. If communication is now established, you have determined that the other modem is defective. Refer to the manufacturer’s literature for the return policy. If communication is not established, the leased lines must be defective. Contact your telephone company. 56 Leased Line Modem Application Note
Checking Revision Level This troubleshooting technique applies to the MultiModemV32L unit only, and determines if your modem has a communication bug. With the modem connected to the terminal, type the following command and press Enter: ATI1 The screen displays the firmware revision of the modem. If your MultiModemV32L unit is at Revision 7.04 or earlier, its firmware has a communication bug. This bug causes the originate modem to go into an error state during which it loses communication with the network momentarily. When this occurs, the OWS will report that the N2 devices, printer, or the direct connect is offline. Then, a minute or two later, the leased line modem will come back online. This pattern cycles every 255 minutes (i.e., the value of S18 as set during configuration). The modem goes into the error state only when: • the leased line is restored after being offline, and a dialback line is not connected • you press the Voice/Data switch and the dialback line is not connected • the dialback line is being used and you press the Voice/Data switch to go back to leased line while the modems are communicating To clear this problem, cycle power on the originate modem while the modems are operating on leased line. This resets the originate modem and restores proper communication. Then, if at any other time the NCM, printer, or N2 device go offline again, cycle power on the originate modem to reset.
Modem Does Not Configure Properly If the MultiModemII MT2834BL/BLI unit does not configure properly in any of the applications (remote workstation, remote N2 Bus, or remote printer), perform the following steps: 1. Set all modem switches to the factory default positions for asynchronous operation. The settings are listed on the bottom of the modem. 2. Enter the command AT&W1&F and press Enter, at 9600 baud. This sets the modem to the factory defaults. 3. Set the switches and configure the modem as described in this document. If you have further problems, please contact the Field Support Center in Milwaukee at 1-888-281-3792. Leased Line Modem Application Note 57
Reference
Modem Commands Table 28 lists the modem commands that are important to this application.
Table 28: Modem Commands Command Description E0 Suppresses command character echo. S18=255 Disables modems from interrupting communication for 255 minutes. Q1 Suppresses result codes. Y1 Enables Carrier Detect to go low immediately on space breaks (needed for proper handshaking). $BA Allows speed conversion between the serial port and line I/O. $MB9600 Sets line baud rate to 9600 bps. $SB9600 Sets serial port output to 9600 baud. &BS0 Puts transmit block size to 64 characters maximum (used for faster error detection/correction). &E0 Disables error correction. &E1 Enables auto reliable error correction. &E5 Enables Xon/Xoff modem-initiated flow control. &E6 Disables Xon/Xoff characters from being passed through the modems. &E7 Enables Xon/Xoff characters to be passed through the modems. &W0 Stores configuration in EEPROM. &W1&F Sets modem to factory defaults.
Modem Switch Settings The modem’s switch settings are described in a summary that is attached to the bottom of the unit. Consult the summary for more information. Also note that the switches on the MultiModemV32L unit are located on the bottom and the switches on the MultiModemII unit are on the side. 58 Leased Line Modem Application Note
Ordering Information
Johnson Controls Code Numbers
Table 29: Johnson Controls Code Numbers Description Product Code Number RS-232 Cable (35 feet) NU-CBL101-0 RS-232 Male Hood (One Required for MHK101 Each Cable)
Vendor Code Numbers The MultiModemV32L unit or MultiModemII unit can be purchased from the dealer listed in the following table. Specify a Johnson Controls order to obtain the discount.
Table 30: Vendor Code Numbers Description Model Number Dealer RS-232 to N2 Bus 485TBLED B & B Electronics Converter 707 Dayton Road PO Box 1040 Ottawa, IL 61350 (815) 433-5100 Power Supply for 485PS2 B & B Electronics Converter 707 Dayton Road PO Box 1040 Ottawa, IL 61350 (815) 433-5100 Multi-Tech MT2834BL (2 or 4 wire) Delta Communications, Inc Systems (115 VAC) 11617 W. Bluemound Road MultiModemII MT2834BA (2 wire only) Wauwatosa, WI 53226 (414) 774-7270 (Leased Line MT2834BLI (240 VAC) Modem) (414) 777-7277 (FAX) Note: This model or replaces MT1432BL/BLI. Johnson Controls IT Acquisition Services (ITAS) Department Leased Line Modem Application Note 59
Ordering a Leased Line Contact your local telephone company to establish a private line in your building. Ask for the following:
Table 31: Ordering a Leased Line Category Specification Circuit/Channel Type 3002 (four wire) or 3003 (two wire) or local equivalent Voice-grade line Point-to-point (i.e., two point) Full duplex Baud Rate 9600 bps Signal Conditioning No Connecting Arrangement Modular, pinch plug (RJ11)
The telephone company will also ask for the address, city, cross street, billing telephone number, and existing account number of the installation. You may have to answer other questions specific to your telephone company and location. If you have any further questions regarding line compatibility with these modems, contact your local distributor or Multi-Tech Systems, Inc.
Controls Group 507 E. Michigan Street www.johnsoncontrols.com P.O. Box 423 Release 12.00 Milwaukee, WI 53201 Printed in U.S.A.