● Use shielded twisted pair cables.
● Use only one type of transmission cable. Do not mix more than 1 type.
● Twisted pair cables are recommended in noisy environments.
● When using shielded cable with crossover wiring for the RS-485 transmission line, grounded
one end.
3.2.3 Wiring Method
■
Wiring method
1. Remove a portion of the wire’s insulation.
2. Insert wire into terminal hole until it stops. Tighten screw clockwise to fix wire in place.
(Tightening torque: 0.22 N･m to 0.25 N･m)
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Precautions on wiring
The following precautions should be observed to avoid broken or disconnected wires.
● When removing the wire’s insulation, be careful not to scratch the core wire.
● Do not twist the core wires to connect them.
● Do not solder the core wires to connect them. The solder may break due to vibration.
● After wiring, make sure stress is not applied to the wire.
● In the terminal block socket construction, if the wire is fastened upon counter-clockwise
rotation of the screw, the connection is faulty. Disconnect the wire, check the terminal hole,
and then re-connect the wire.
3.2 Wiring of COM. Port Terminal Block
WUME-FP7COM-07 3-5
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