Rockwell Automation 1901 SyncPro - Manual (Page 13)

Product Description 1-9
1901-UM020C-EN-P – June 2013
Field Application
TRANSITION COMPLETE CONTACT (I:4/06)
(OPTIONAL)
The field relay output will not be energized until this input
permissive is given. Once the field relay is picked up, this
permissive is no longer required. If the permissive is not given
prior to the squirrel-cage protection timing out or the incomplete
sequence timing out, the SyncPro will fault and stop the motor.
If unused, it must be tied high. This input is intended for an
external input such as the RUN contact of an autotransformer
starter. It prevents synchronization until the autotransformer
starter has first transitioned to full voltage RUN mode.
FIELD RELAY (O:3/00)
This output controls the field contactor relay which applies the
field to the motor. This output is energized when the transition
complete permissive is given and the synchronous setpoint has
been reached. The field is then applied either on the rising
waveform or after a fixed time period of one second if the motor
synchronizes on reluctance torque. The output is dropped whenever
the NOT STOP is removed, the EQUIPMENT SHUTDOWN
RELAY is removed, or a fault is detected.
Feedback
MOTOR CONTACTOR FEEDBACK CONTACT (I:4/08)
This input indicates to the SyncPro that the motor contactor is
closed, confirming that the motor is running. It also allows the
SyncPro to detect a fault in the contactor circuit.
FIELD CONTACTOR FEEDBACK CONTACT (I:4/05)
This input indicates to the SyncPro that the field contactor has
picked up, confirming that the field has been applied. (The signal
must come from the auxiliary of the coil which ultimately applies
the field, i.e. contactor.) If missing, the SyncPro detects a fault in
the field circuit.
TRIP/RESET PB INPUT (I:4/02)
This input from the push button on the panel will reset any fault
condition in the SyncPro. Once no fault exists, the fault condition
will be removed from the DTAM and the TRIP output will be set.