Control Circuit Wiring Precautions - YASKAWA Varispeed E7 Instruction Manual And Parameter Description

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,
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, 1, 2, and 3) and other high-power lines.
Separate wiring for control circuit terminals MA, MB, MC, M1, M2, M3, and M4 (contact outputs) from
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wiring to other control circuit terminals.
If using an optional external power supply, it shall be a UL Listed Class 2 power supply source.
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Use twisted-pair or shielded twisted-pair cables for control circuits to prevent operating faults.
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Ground the cable shields so as to maximise the contact area of the shield and ground.
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Cable shields have to be grounded on both cable ends.
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Wiring Control Circuit Terminals
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