ATTENTION
Avoid voltage peaks when switching off!
If the excitation current of the holding brake is switched off on the DC
side, a voltage peak occurs which can be higher than 1000 V. It is caused
by the inductance of the holding brake. A varistor should be connected in
parallel to the coil to prevent this voltage peak.
On motors with plug connector and built-in brake, it is the user's respon-
sibility to install the varistor provided to control the brake.
U
+
-
Figure 3: Varistor protective wiring
2.5.4 Speed and shaft position measuring system
The servo motor is equipped with a resolver for speed and shaft position measurement.
WARNING
Adjustment of the measuring system!
The measuring system of synchronous motors must be adjusted to the
respective inverter. Any mis-adjustment may lead to uncontrolled motor
response or complete failure of the motor.
In order to avoid any risk, the motor must be put into operation only in
no-load operation, without connection to the system.
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PRODUCT DESCRIPTION
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