Wiring Guidelines

Use shielded, properly grounded cables for all communication connections. If you do not use shielded cable for these connections, electromagnetic interference can cause signal degradation. Degraded signals can cause the bus coupler or attached modules and equipment to perform in an unintended manner.

Install cable ducts in the enclosure to manage the power and control wiring. In addition, observe the following rules when wiring the TeSys island:

Verify that the operating conditions and environment are within the specified values.
Use proper wire sizes to meet voltage and current requirements.
Use copper conductors only.
Use twisted pair, shielded cables for networks and the fieldbus.
Separate the communication wiring from the power wiring. Route the communication wiring and power wiring in separate conduit.
Keep a minimum distance of 30 cm (11.8 in.) between the communication cable and the power and/or control cables.
Whenever power and communication wiring cross, the cables must cross at right angles.
Do not over-bend the cables. The standard minimum bending radius is 10 times the cable diameter.
Avoid routing cable against surfaces with sharp angles.
Use only shielded I/O cabling for the Analog I/O module. Twisted-pair inner conductors are recommended to help reduce stray field coupling. Attach the cable shield foil to the TeSys island DIN rail or panel. Do not make the shield connection by using just the shield drain wire. Use a shield clamp to provide a circumferential shield connection. Spring-loaded shield clamps, like Phoenix Contact 3062799, provide a convenient means to make the shield connection to the DIN Rail.