Accessories
4.6 Motor operators
3VA molded case circuit breakers with IEC certificate
338 Manual, 03/2019, A5E03603177010-03
The MO310 requires a pause period of 80 ms between the end of an OFF signal and the
edge of an ON signal. Since the OFF signal is dominant, it does not require a pause period.
Faults, causes of faults and rectification of faults
Device defective and internal fault:
● "Device defective" refers to a fault or defect in the motor operator which cannot be
rectified. The device must be replaced. This can be caused by a defective microswitch,
for example.
● "Internal error" refers to faults which can be rectified (e.g. an undefined switching position,
fault during automatic RESET, excessively long switching times). If the motor operator
fault condition cannot be rectified by switching it ON/OFF again, the switching position
must be corrected manually.
You must first ensure that the rotary switch for RESET mode is in a defined state.
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