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îš‹ Control Circuit Wiring Precautions
Observe the following precautions when wiring control circuits.
• Separate control circuit wiring from main circuit wiring (terminals R/L1, S/L2, T/L3, U/T1, V/T2, W/T3,
, 1, 2, and 3) and other high-power lines.
• Separate wiring for control circuit terminals MA, MB, MC, M1, M2, M3, and M4 (relay outputs) from
wiring to other control circuit terminals.
• If using an optional external power supply, it shall be a UL Listed Class 2 power supply source.
• Use twisted-pair or shielded twisted-pair cables for control circuits to prevent operating faults.
• Ground the cable shields so as to maximize the contact area of the shield and ground.
• Cable shields have to be grounded on both cable ends.
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