Rockwell Automation 1902 Syncpro II - Manual (Page 14)

14 Rockwell Automation Publication 1902-IN001B-EN-E - April 2013
Chapter 1 Product Description
EQUIPMENT SHUTDOWN RELAY (ESR) INPUT (I:2/7)
This fault input is used to group all external faults. It notifies the SyncPro II that
the system has stopped for an external reason. The SyncPro II will send a message
indicating the reason for the stoppage. In the normal state this signal is held high,
going low on a fault condition. While this signal is low, a start signal will not be
accepted. Typically, all emergency stops or external faults (i.e. overloads, motor
protection relays) will be wired to an ESR relay. This relay is then fed into the
SyncPro II for logging and control and also tied into the hardware to stop the
motor.
TRIP OUTPUT (O:0/0)
This output is high during normal conditions. When the SyncPro II detects a
fault, the output goes low and the SyncPro II stops the motor. The trip output is
typically wired into the ESR circuit. It will be set high when there are no faults
and the FAULT RESET PB is momentarily raised high.
Field Application
TRANSITION COMPLETE CONTACT INPUT (I:2/6) (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 II 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 OUTPUT (O:0/2)
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.