Technical Reference Note CAN / RS485 Interface Adapter For SHP Series Total Power: < 1 Watts Input Voltage: 5V Internal Outputs: CAN, RS485, USB, I2C Special Features Product Description The new SHP Extension adapter enables both USB and Controller Area Network (CAN) or RS485 Bus connectivity, providing a complete interface between the • Input Protocols: SHP device and the I2C bus with a simple command set which enables the 1) RS485 using Modbus highest levels of configuration flexibility. 2) CAN using modified Modbus The CAN/RS485 to I2C interface adapter modules connect with CAN Bus • Output Protocol: architectures through CaseRx/CaseTx interfaces found on the SHP case. The I2C with SMBus Support modules communicate with on-board I2C Bus via MODbus Protocol for RS485 Bus and modified MODbus for CANbus. The new adapters now enable the SHP to be used in a host of new ruggedized applications including automotive networks, industrial networks, medical equipment and building automation systems. The RS485/CAN-to-I2C uses 2 Input Protocols and 1 Output Protocol. The Input Protocols used are: RS485 using Modbus (Command Index: 0x01), and CAN using modified Modus (Command Index: 0x02). The Output Protocol use is: I2C with SMBus support (Command Index: 0x80). www.solahd.com
[email protected] Technical Reference Note Table of Contents 1. Model Number ………………………….………………………………………………………………. 4 2. General Description ……………………………………………………………………………………. 5 3. Electrical Specifications ……………………………………………………………………………..… 6 4. Mechanical Specification …………………………………………………….….…………………….. 9 5. Hardware Interfaces ………………………………………………………….……………………..... 12 6. Software Interfaces ……………………………………………………………................................ 13 6.1 Adapter Protocol Overview ……………………………………………………………………… 13 6.2 Protocol Transaction …………………………………………………………………………….. 13 6.3 Adapter Command and Response Packets …………………………………………….…..… 14 6.4 Adapter Control Commands ……………………………………………………………..……..