Data Signal Protection Protecting Industrial Bus (Data) Signals TRABTECH Application Note 2558A 1 Description Industrial networks, such as Profibus®, Foundation Fieldbus and RS-485, can be protected with the PLUGTRAB (PT…-HF…) product series. The PT…-HF… products feature a unique hybrid circuit with specially arranged components to minimize circuit capacitance. This ensures that there will not be any attenuation of the data signal for even the fastest of bus networks. The PT…-HF… can be used with systems up to 12 Mbits/sec. With surge current handling capacity up to 10 kA, vulnerable network interface cards are safely protected. As with all PLUGTRAB PT products, maintenance and testing are easy with “hot-swap” plugs. These products are typically installed inside a control cabinet on a DIN rail (NS 35). Table 1 provides a guide to assist in selection of the proper products based on a network’s physical layer. The wiring diagrams that follow show the most popular bus network circuits. © PHOENIX CONTACT - 09/2009 For Ethernet connections using RJ45 connectors, use the following options: −− D-LAN-CAT.5E (Order No. 2858991) for Category 5 cable −− D-LAN-CAT.5E-U (Order No. 2859084) for Category 5 cable using DIN rail mount −− D-LAN-CAT.6+ (Order No. 2881007) for Category 6 cable and PoE Data Signal Protection 2 Product Selection Product IN (unprotected) OUT (protected) Shield Earth-ground RS-232 PT 5-HF-12DC Txd - 1 Rxd - 7 Txd - 2 Rxd - 4 IN - 9 OUT - 10 IN - 3 OUT - 4 RS-422 PT 5-HF-12DC Pair 1 - 1 & 5 Pair 2 - 7 & 11 Pair 1 - 2 & 6 Pair 2 - 8 & 12 IN - 9 OUT - 10 IN - 3 OUT - 4 RS-485 (4-wire) PT 5-HF-12DC Pair 1 - 1 & 5 Pair 2 - 7 & 11 Pair 1 - 2 & 6 Pair 2 - 8 & 12 IN - 9 OUT - 10 IN - 3 OUT - 4 RS-485 (2-wire) PT 2X2-HF-12DC Data Highway (DH-485) PT 5-HF-12DC A-1 B-5 Common - 7 A-2 B-6 Common - 8 IN - 9 OUT - 10 IN - 3 OUT - 4 Data Highway (DH) Data Highway + (DH+) PT 5-HF-12DC Clear wire - 1 Blue wire - 5 Clear wire - 2 Blue wire - 6 IN - 9 OUT - 10 IN - 3 OUT - 4 Remote I/O PT 5-HF-12DC Clear wire - 1 Blue wire - 5 Clear wire - 2 Blue wire - 6 IN - 9 OUT - 10 IN - 3 OUT - 4 DeviceNet™ (data bus) PT 5-HF-5DC 1&5 2&6 IN - 9 OUT - 10 IN - 3 OUT - 4 DeviceNet™ (bus power) PT 2-PE/S-24AC L & N (IN) L & N (OUT) Modbus® (RS-232) PT 5-HF-12DC Txd - 1 Rxd - 7 Txd - 2 Rxd - 4 IN - 9 OUT - 10 IN - 3 OUT - 4 Modbus + PT 5-HF-12DC Pair 1 - 1 & 5 Pair 2 - 7 & 11 Pair 1 - 2 & 6 Pair 2 - 8 & 12 IN - 9 OUT - 10 IN - 3 OUT - 4 Genius® I/O PT 2X2-12DC S1 - 1 S2 - 5 S1 - 2 S2 - 6 IN - 9 OUT - 10 IN - 3 OUT - 4 Profibus DP (up to 12 Mbit/s) PT 5-HF-12DC DATA (+) - 1 DATA (–) - 5 DATA (+) - 2 DATA (–) - 6 IN - 9 OUT - 10 IN - 3 OUT - 4 PT 5-HF-5DC DATA (+) - 1 DATA (–) - 5 DATA (+) - 2 DATA (–) - 6 IN - 9 OUT - 10 IN - 3 OUT - 4 Ethernet (10Base-T) PT 5-HF-5DC Pair 1 - 1 & 5 Pair 2 - 7 & 11 Pair 1 - 2 & 6 Pair 2 - 8 & 12 IN - 9 OUT - 10 IN - 3 OUT - 4 T1/E1 PT 5-HF-12DC Pair 1 - 1 & 5 Pair 2 - 7 & 11 Pair 1 - 2 & 6 Pair 2 - 8 & 12 IN - 9 OUT - 10 IN - 3 OUT - 4 ISDN PT 5-HF-5DC Pair 1 - 1 & 5 Pair 2 - 7 & 11 Pair 1 - 2 & 6 Pair 2 - 8 & 12 IN - 9 OUT - 10 IN - 3 OUT - 4 Foundation Fieldbus - Data PT 3-HF-12DC Pair 1 - 1 & 5 Pair 2 - 7 & 11 Pair 1 - 2 & 6 Pair 2 - 8 & 12 IN - 9 OUT - 10 IN - 3 OUT - 4 - Power PT 2-PE/S-24AC L & N (IN) L & N (OUT) Txd - 2 (or 8) Rxd - 4 (or 12) IN - 3 OUT - 4 IN - PE OUT - PE INTERBUS INTERBUS MUX Ethernet (10Base-5) 2 IN - PE OUT - PE Phoenix Contact 2558A Data Signal Protection 3 Common Protection Methods Figure 1. RS-485 (2-wire) Figure 2. RS-422 Figure 3. RS-232 2558A Phoenix Contact 3 Data Signal Protection Figure 4. Profibus Figure 5. Modbus + Figure 6. Data Highway 2558A Phoenix Contact • P.O. Box 4100 • Harrisburg, PA 17111-0100 • USA Sales: 1-800-888-7388 • Technical Service: 1-800-888-7388 www.phoenixcontact.com 4