Omron K7GE-MG User Manual page 67

When the Load Is a Servo Motor
Install a contactor between the Servo Drive output and the motor.
The contactor is required only in the power line. Relays
the motor power cables other than the power line to the
terminal blocks and connect it to the Servo Drive directly.
Connect the voltage input of the Probe Unit of the
K7GE-MG to the secondary output terminal (motor side)
of the contactor.
Turn the contactor ON and OFF when the Servo Drive
power is OFF.
Brake
FG
Relay
FG
Brake cable
The figure shows a simplified view of the wiring for status output during measurement, and ALM 1 and
ALM 2 outputs. Use an appropriate relay for relaying in consideration of the switching capacity of the
output transistor. The specifications of the output transistor for the K7GE-MG are 24 VDC (+10%), 50
mA max.
Insulation Resistance Monitoring Device User's Manual (N224)
R S T Servo Drive
PE
U V W
Contactor
MC-a
Operation
U V W
power supply
2
Motor power 1
cable
PE
7
Status output during
measurement
Servo
motor
Do not connect any other device such as a
transformer or a filter between the contactor
and the motor. Doing so may cause incorrect
measurement.
Make sure that it is not connected to the
primary side (power supply side). It cannot be
measured correctly and may cause a
hazardous condition.
If the contactor is turned OFF while the Servo
Drive is turned ON, the rotating shaft of the
motor will be in a free. If the contactor is
turned on after that, the motor may perform
unintended operation and can be dangerous.
Servo Drive
OFF
power supply
Contactor
OFF
Servo Drive
ON
power supply
Contactor
OFF
Trigger
input
K7GE-MG
3 4 1 3
Probe Unit
Main Unit
17 18 13 14 15 16
17 18
ALM 1 ALM 2
3 Installation and Wiring
Correct
Incorrect
3
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