Control Circuit Wiring Precautions - YASKAWA Varispeed F7 Instruction Manual

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, B1, B2, U/T1, V/T2,
•
W/T3,
Separate wiring for control circuit terminals MA, MB, MC, M1, and M2 (contact outputs) from wiring to
•
other control circuit terminals.
Use shielded twisted-pair cables for control circuits to prevent operating faults. Process cable ends as
•
shown in Fig 2.23.
Connect the shield wire to terminal E (G).
•
Insulate the shield with tape to prevent contact with other signal lines and equipment.
•
Use a class 2 power supply (UL standard) when connecting to the control terminals.
•
-30
2
, 1, 2, and 3) and other high-power lines.
Shield sheath
Connect to shield sheath ter-
minal at Inverter (terminal E
(G))
Fig 2.23 Processing the Ends of Shielded Twisted-pair Cables
Armor
Do not connect here.
Insulate with tape