Rockwell Automation 1902 Syncpro II - Manual (Page 15)

Rockwell Automation Publication 1902-IN001B-EN-E - April 2013 15
Product Description Chapter 1
Feedback
MOTOR CONTACTOR FEEDBACK CONTACT INPUT (I:2/8)
This input indicates to the SyncPro II that the motor contactor is closed,
confirming that the motor is running. It also allows the SyncPro II to detect a
fault in the contactor circuit.
FIELD CONTACTOR FEEDBACK CONTACT INPUT (I:2/5)
This input indicates to the SyncPro II 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 II detects a fault in the field circuit.
TRIP/RESET PB INPUT (I:2/2)
This input from the push button on the panel will reset any fault condition in the
SyncPro II. Once no fault exists, the fault condition will be removed from the
PanelView and the TRIP output will be set.
Fault Detection
FIELD VOLTAGE RELAY INPUT (I:2/3)
When the signal is low, it indicates a lack of field voltage. This input is monitored
for a fault condition only while starting, prior to applying the field. Tie this input
high if it is not used. When this contact is high, it verifies that the static exciter is
providing an appropriate DC voltage.
FIELD CURRENT RELAY INPUT (I:2/4) (OPTIONAL)
When the signal is low, it indicates a lack of field current. This input is monitored
for a fault condition after the field has been applied. Tie this input high if it is not
used. This optional input verifies there is DC current flowing from the static
exciter to the motor field. It is redundant since the power factor trip feature will
trip if the field current is lost.
POWER FACTOR INPUT (I:1/0)
The signal supplied to the SyncPro II is from the Phase Angle Transducer,
representing a power factor of zero (0) lagging to zero (0) leading respectively.
Note that the SyncPro II firmware has been tailored to this specific transducer.
No substitution is allowed.