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Electrical Installation 2 - 28
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Control Circuit Wiring Precautions
Observe the following precautions when wiring control circuits:
1. Separate control wiring from power/motor wiring (terminals R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, , 1, 2, and
3) and other high-power lines.
2. Separate wiring for control circuit terminals MA, MB, MC, M1, M2, M3, and M4 (digital outputs) from wiring to other
control circuit terminals.
3. If using an optional external power supply, ensure it is a UL Listed Class 2 power supply source.
4. Use twisted-pair or shielded twisted-pair cables for control circuits to prevent operating faults. Prepare cable ends as
shown in Figure below.
5. Connect the shield wire to terminal E(G).
6. Insulate the shield with tape to prevent contact with other signal lines and equipment.
Fig 2.13 Preparing the Termination of Shielded Twisted-pair Cables
Shield sheath
Insulation
Connect to shield sheath
terminal E(G) at Drive
Insulate with tape
Do not connect here.