RECOMMENDATION FOR THE INSTALLATION OF PROFIBUS AND WORLDFIP NETWORKS 8 May 2001 Jacky BRAHY and Raymond BRUN SUMMARY The purpose of this note is to define how to correctly and professionally install a PROFIBUS or WorldFIP fieldbus network at CERN. It defines the installation rules and the various elements to be used. 7+(())(&7,9(),(/'%86 Jacky BRAHY, Division LHC/IAS, CERN, 1211 GENEVE 23 (CH) Tel : 00 41 22 767 86 48, Fax : 00 41 22 767 95 80 E-Mail : [email protected] Raymond BRUN, Division LHC/IAS, CERN, 1211 GENEVE 23 (CH) Tel : 00 41 22 767 69 46, Fax : 00 41 22 767 95 80 E-Mail : [email protected] SUMMARY • CABLES RECOMMENDED AT CERN : Page 3 • WORLDFIP installation guide : Page 7 • PROFIBUS installation guide : Page 23 2 CABLES RECOMMENDED AT CERN Jacky BRAHY & Raymond BRUN LHC-IAS 3 HALOGEN FREE CABLE COMMON TO PROFIBUS and WORLDFIP NETWORKS The cables used must correspond to the characteristics defined in the standards in use and to the Safety Requirements at CERN. The colours are not imposed by the standards, but in order to better distinguish the networks installed at CERN it is preferable to respect the recommended colours. 1) Colour of the cable : a colour by type of network • Purple for PROFIBUS • Green for WorldFIP • Blue for the (H1) instrumentation network with intrinsic protection for PROFIBUS PA and FIELDBUS-FOUNDATION (FF) which will probably be the WorldFIP instrumentation bus. The transmission speed is 31.25 kbit/s. • Black for the (H1) instrumentation network without intrinsic protection. Note : For information, the colour orange is already reserved for the optical cables and brown for ETHERNET. 2) Main cable "Trunk" PROFIBUS DP (9,6 kHz to 12 Mhz) WorldFIP (1Mbit/s and 2.5Kbit/s) Impedance characteristic : 150 Ω Capacity : < 30 pf/m Line Impedance: ≤ 110 Ω/km Wire Gauge : 0.64 mm Section : > 0.34 mm2 Colour : • Outer covering : Purple for PROFIBUS Green for WorldFIP • Conductors : Red and Green WorldFIP & PROFIBUS are available permanently at the CERN store • under the SCEM : 04.21.60.020.4 for PROFIBUS • under the SCEM : 04.21.60.120.1 for WorldFIP 3) Derivation cable for WorldFIP • One has to use 2 twisted pairs of armoured 150Ω cable and it should be multistranded for the realisation of more flexible and "non breakable" Derivations. 4 4) Cable for intrinsic protection (or not) for PROFIBUS PA and WorldFIP (FF) at 31.25kbit/s Characteristic impedance: 100 Ω Line impedance : ≤ 44 Ω/km Wire gauge : 0.64 mm Section : > 0.8 mm2 Colour : Blue for EX(Explosive Environment) applications Black for not EX applications References : • Belden : Cable PROFIBUS PA 3076F LSNH • Kerpen : Cable PROFIBUS PA FB-02YS(St+C)H Note : • These cables follow the IEC-1158-2 Standard. • The Derivation cable is not selected for the moment. 5 5) Tool for "Fast Connect" fast stripping of wiring The tool "Fast Connect" makes it possible to quickly prepare the end of the cable to be connected to the connector. This tool requires the use of a specific cable. References : • Tool : SCEM 34.94.36.320.2 • Cable : Standard at CERN under the references previously quoted. 6 WorldFIP installation Guide Raymond BRUN LHC-IAS 7 RECOMMENDATIONS FOR THE INSTALLATION OF A WORLDFIP FIELDBUS Figure 1 shows the various elements of a standard WorldFIP fieldbus at CERN. PLC Premium PCMCIA Module (TSXFPP10) Cable 1 paire torsadée 1 blindée 150 Ohm (Tronc) (TSXFPCG10) Boîtier de Boîtier de Terminaison Dérivation Dérivation 150 OHM 11b L3 (Acc7) R R Terminaison 11 3 (Acc4) (Acc4)(Acc4) (Acc4) 150 OHM 2 Cable 2 paires Etanche Etanche torsadées blindées Métallique Métallique 150 Ohm + 1 SUB_D9 + 1 SUB_D9 (Dérivation) L1 L2 Ln-1 Ln 11a Terminaison 150 OHM SUB_D9 Connecteur Connecteur Connecteur R (Acc2) Femelle Métallique Métallique Métallique (Acc7) 7 (Acc2) (Acc2) (Acc2) Distance maxi : 5 Km théorique mais 1 Km conseillée Nota : La distance maxi est égale à la somme des distances L1 à Ln BUS WorldFIP 1 MHz et 2.5 MHz Figure : 1 8 JUNCTION BOX "TAP" [Ref. 1] Reference mark 3 : Metal IP 65 derivation box. It has in addition one female 9 pin SUB-D9 for the connection of all the equipment being connected to the bus via a PCMCIA (TSXFPP10) card established in a Schneider PLC. Code : TSX FP ACC 4. CONNECTOR Reference mark 7 : SUB-D9 female connector and metal cap allowing connection in chain or derivation. Code. : TSX FP ACC 2 LINE TERMINATOR Reference mark 11 : Its role is to adapt the end of the fieldbus to the characteristic impedance (150Ω) in order to avoid any reflections. It can be established on the connector itself (Reference mark 11a) or in a distribution box (Reference mark 11b). Code : TSX FP ACC 7 9 "COPPER" BUS REPEATER Reference mark 8 : The Schneider bus repeater is represented in figure 2. It makes it possible to increase the number of stations or the length of the fieldbus by the creation of additional segments with a 1000 metres maximum length. It is possible to cascade a maximum of 4 repeaters allowing a fieldbus length of 5000m. Code : TSX FP ACC 6. Note : The repeater must be supplied with power and designed for a speed of 1Mbit/s. 1000 m max 1000 m max 1000 m max ( 256 Stations Maxi) 32 Stations 32 Stations 32 Stations 150 Ohm 150 Ohm 150 Ohm 150 Ohm R R R R 11 11 R R 150 Ohm 8 8 150 Ohm +/- 24V* +/- 24V* Repeteur Repeteur * Alimentation DC redressée mais non filtrée (+19 V à + 36 V ) REPETEUR ELECTRIQUE 1 MHz SCHNEIDER ( 32 Stations ou 1 Km ) Figure : 2 10 Reference mark 12 : ditto for the Alstom repeater represented in figure 3. Code : RP131 / IR 155-1C It must be supplied with 24V and designed for a speed of 2.5Mbit/s. Code : RP131 / IR 155-2C It must be supplied with 24V and designed for a speed of 2.5Mbit/s. Note : Repeater RP131 can also function at 1Mbit/s and 31.25kbit/s 700 m max 700 m max 700 m max ( 256 Stations Maxi) 32 Stations 32 Stations 32 Stations 11 11 Segment No 1 150 Ohm 150 Ohm Segment No 3 R R R R 11 11 150 Ohm 150 Ohm 12 IR155-2C 12 IR155-2C 11 R R 11 150 Ohm 150 Ohm Segment No 2 12 Répéteur RP131 / IR155-2C (48V) / IR155-1C (24V) REPETEUR ELECTRIQUE 2,5 MHz ALSTOM ( 32 Stations ou 700 m ) R. BRUN et D. GLENAT le : 4-4-2000 Figure : 3 11 OPTICAL BUS REPEATER Reference mark 9 : The optical repeater represented in figure 4, makes it possible to interconnect 2 copper segments via an optical fibre which ensures good behaviour of the fieldbus over long distances or for the connection of optical equipment. Code : TSX FP ACC 8M. Note : It must be powered like the copper repeater and designed for a speed of 1Mbit/s. Terminaison Terminaison ACC 7 ACC 7 11 11 R R 11 11 R R Distance 150 Ohm 150 Ohm 9 jusqu'à 30km 9 +/- 24V* +/- 24V* 9 Coupleur Cuivre / Optique * Alimentation DC redressée mais non filtrée (+19 V à + 36 V ) Liaison Optique Figure : 4 12 CONNECTION RULES The rules for connection of the active conductors and shielding are: • Connection of the conductors : See Appendix 1 and 2 • Shielding and grounding of the fieldbus : See Appendix 2 and 3. • Minimum radius of curvature of the cable equal to ten times its diameter, that is 80 to 100mm. Note : Other recommendations relating to this chapter are detailed in two notes, one from Schneider [1], and the other from Alstom [2]. SPEED AND DISTANCE According to the condition of use (environment, quality of the cable), the operational maximum distances will be the following ones: With a copper fieldbus • 31,25 kbit/s : from 5 to 20km • 1 Mbit/s : from 1 to 4km • 2.5 Mbit/s : from 500m to 1,5km In practice, to prevent any problems, the maximum distances selected are the following: • 31,25 kbit/s : 10km • 1 Mbit/s : 1km • 2.5 Mbit/s : 700m With an optical fieldbus • 31,25 kbit/s, 1 Mbit/s and 2,5 Mbit/s : 40km CONCLUSION During all the LHC construction, the cables and distribution boxes relating to the WorldFIP fieldbus will be held in stock in the CERN store. REFERENCES [1] Schneider Electric : Platform of Automatism Premium / Catalogue August 99 [2] Alstom-Cegelec / WorldFIP : Design and installation Manual / ALS 50414 b-en / edition 03-98 13 Appendix 1 : Network of the WorldFIP laboratory (Example of connection and grounding) PC FIP MBX 1000 Designer Module microFIP CC131 Male Male Male femelle femelle femelle pont de connexion ab du blindage SUB DB 9 Femelle 6 7 Au moins un point direct à la terre + - Les autres (le maximum) à travers un condensateur "haute tension" normalement implanté sur chaque moduel WorldFIP (pont de connexion -a- ou -b-) Connexion Câble WorldFIP See also CERN WorldFIP site : http://wwwlhc.cern.ch/IAS/Frames/WS_Frames.html 14 Appendix 2 : Connection of fieldbus cable (Extracted from the " FIPIO Reference Handbook ") 1- Preparation of the cables. • draw the cable over a length of approximately 5 cm, • Cut the braid at the level of the ground connection, • Set up the ground connection collar (the position of the collar on the cable must take account of its fixing in the connector, on the right or on the left of the cable), • divide the strip iron and the colourless snap rings to release the conductors, • strip each conductor over a length of approximately 5 mm and equip them with the ends provided.