User Manual Installation, Assembly and Commissioning
EM1 Series AC Servo Motors EM1-01-0-EN-2110-MA Page 54 of 72
Please check if the motor input, driver input and brake input voltage is correct. It is
especially important to check if the power and signal wires connected to the encoder are
correct. Incorrectly distributed wires can cause abnormal motor operation and cause
damage or malfunction in motors and drivers.
Try to separate the motor power cable and the encoder power cable and signal cable. This
is to prevent electrical signal coupling and noise (do not install the power and signal on the
same circuit).
Do not conduct voltage resistance test on the encoder. This can damage the encoder.
Do not connect the servo motor U, V, W directly to the input power.
Install an external emergency stop circuit to ensure that power can be shut off in an
emergency situation.
Do not touch the terminal within 5 minutes after power off because the residual high
voltage may still remain in the connector.
Warning! Risk of Short Circuit Caused by Liquid, Lubricant or Pollutions.
When installing or replacing drive components, provide open sides of power connectors
with protective caps.
Do only open terminal boxes for connection purpose and close them immediately after the
connection is done.
Attention! Risk of Personal Injury.
Ensure the servo motor is correctly grounded.
The resistance of ground terminal connection shall be less than 10 Ω when the input
voltage of the drive is 400 V; Less than 50 Ω when it is 220 V and shall be less than 100 Ω
when it is 110 V.
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