Notes - GE MOTOR MANAGER 2 Instruction Manual

9.12 DUTY/STANDBY STARTER 9 STARTER TYPES

9.12.3 NOTES

When the power to the MM2 is interrupted, all output relays on the MM2 will de-energize causing
them to open and stop the motor. The MM2 can only be wired for fail-safe operation.
If feedback is not received by the Contactor A Status N.O. or Contactor B Status N.O. inputs within
one second of closing the corresponding output relay, an OPEN CONTROL CIRCUIT alarm will
occur. This will open the active output relay which will stop the motor.
If feedback remains at Contactor A Status N.O. or Contactor B Status N.O. inputs for more than one
second after opening the corresponding output relay, a WELDED CONTACTOR alarm will occur.
The Start A input and key are used to start motors A and B. The Start B input and faceplate key have
no effect.
Serial Control starts override the mode of operation of the Duty/Standby starter. For example a serial
start B command will always start motor B and a serial start A will always start motor A. This is true
for AUTO START A and AUTO START B programmable interlock functions as well.
9
9-36 MM2 Motor Manager 2
GE Power Management