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12
Important Wiring Considerations
Use the following guidelines when planning the system wiring for the module:
• Install the SLC 500 system in a NEMA-rated enclosure.
• Disconnect power to the SLC processor and the module before wiring.
• Make sure the SLC 500 system is properly grounded.
• Group this module and low-voltage DC modules away from AC I/O or
high-voltage DC modules.
• Shielded cable is required for high-speed input signals A, B, and Z. We
recommend Belden 9503 or equivalent for lengths up to 305 m (1000 ft).
• When the LS input is driven by an electromechanical device, route the
wiring away from other inputs. In addition, JW1 should be set for the 10 ms
filter.
• When the LS input is driven by a solid-state device, use a shielded cable.
You do not have to route the cable away from other inputs.
• Shields should be grounded only at the end of the signal source end of the
cable. Ground the shield to the case of the signal source, so energy coupled
to the shield will not be delivered to signal source's electronics.
Input and Output Connections
Input and output wiring terminals are located on the front of the module, behind
the terminal cover. When you connect input and output devices, you must also be
concerned with the settings of dip switch SW1 (input connections), dip switch
SW2 (output connections), and jumper JW1 (limit switch input connections). The
location and description of these are shown on pages 7 through 9.
Publication 1746-5.16
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