Rockwell Automation 1746-NT8 SLC 500 Thermocouple/mV Analog Input Module/ Instructions - Manual (Page 14)

14 SLC 500 Thermocouple/mV Analog Input Module
Publication 1746-IN015C-EN-P - July 2001
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Ground the shield drain wire at only one end of the cable. The preferred
location is at the shield connections on the terminal block. (Refer to IEEE
Std. 518, Section 6.4.2.7 or contact your sensor manufacturer for additional
details.)
•
Keep all unshielded wires as short as possible.
•
Excessive tightening can strip a screw. Tighten screws no more than
0.25 Nm.
•
Follow system grounding and wiring guidelines found in your SLC 500
Installation and Operation Manual.
Preparing and Wiring the Cables
To prepare and connect cable leads and drain wires, follow these steps:
1. At each end of the cable, strip some casing to expose individual wires.
2. Trim signal wires to 5-inch lengths beyond the cable casing. Strip about
4.76 mm (0.1875 in.) of insulation to expose the ends of the wires.
3. At the module-end of the cables:
•
extract the drain wire and signal wires
•
remove the foil shield
•
bundle the input cables with a cable strap
4. Connect the following pairs of drain wires together.
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Channels 0 and 1
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Channels 2 and 3
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Channels 4 and 5
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Channels 6 and 7
Keep drain wires as short as possible.
(Remove foil shield and
drain wire from sensor-end
of the cable.) Cable
Drain Wire
Signal Wires
Signal Wires