3.6 Control Circuit Wiring
102 YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions
u Wiring the Control Circuit Terminal
Observe the following precautions when wiring control circuits.
• Use shielded twisted-pair wires for analog I/O (terminals L1 to L9) wirings to prevent malfunctions caused by
electrical noise.
• Tighten all terminal screws to the specified tightening torque. Refer to Table 3.11 for details.
• Use round crimp terminals to connect signal wires to the terminal block.
• Use a Phillips screwdriver to tighten terminal screws.
WARNING! Electrical Shock Hazard. Do not touch circuit boards while the power is on. Failure to comply could result in serious
injury or death.
NOTICE: When wiring the control circuit, separate it from the main circuit wiring (terminals R, S, T, U, V and W) and other power lines.
Improper grounding could result in drive malfunction.
NOTICE: Insulate the shielded wires of the drive, e.g. with tape, to prevent their contact with other signal lines or devices. Failure to
comply could result in drive or equipment malfunction due to short circuit.
Terminals for
monitor of motor
bearing
22 to 25
L38 to L45
M3.5 0.8 to 1.0
0.5 to 2
<2>
1.25
Insulated vinyl sheathed cable (CVV) for
control circuit
Terminals for
MEMOBUS/
Modbus
communications
L71 to L74 M3.5 0.8 to 1.0
0.5 to 2
<2>
1.25 Shielded twisted-pair wire <1>
<1> Use shielded twisted-pair wires to input an external speed (frequency) reference.
<2> The size of the round crimp terminals must meet the standards in the country where the drive is being used.
Terminal Type Terminal
Screw
Size
Tightening
Torque
(N•m)
Applicable Gauge
(mm
2
)
Recommended
Gauge
(mm
2
)
Wire Type
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