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Symmetra MW II 1200 kW 3 x 400/230 V Installation - 990-1979E-00114
Relay board 1 connections
Relay Function Mode Special Comments
Output 1 Common alarm Fail safe
Output 2 Normal operation Active on
Output 3 Bypass operation Active on
Output 4 Battery operation Active on
Output 5 V
DC
out of tolerance Fail safe
Output 6 Battery conditon fault Fail safe Battery fault detected by
battery monitor
Output 7 Maintenance bypass
operation
Active on
Output 8 Mains out of tolerance Fail safe
Output 9 Bypass out of tolerance Fail safe
Output 10 Output out of tolerance Fail safe
Output 11 MCCB open Fail safe Battery breakers open
Output 12 System overload Fail safe
Output 13 Good utility Active on If UPS goes into bypass,
this relay goes on without
delay
Output 14 Boost charge active Fail safe
Output 15 Fan fault Fail safe
Output 16 Temperature fault Fail safe Temperature switch active
or faulty temperature sensor
Input 1 Generator active Master will handle
signal
Input for indicating that a
generator is active. This will
be used to reduce the charge
power
Input 2 Battery room ventilation
fault
Individual Input for indicating that the
ventilation in battery rooms
is defect. This will be used
to reduce the charge power
Input 3 DC Ground Fault
Detection
Individual
Input 4 Reserved for future use Master will handle
signal
Input 5 Plant clock
synchronization
Master will handle
signal
Input for real time clock
synchronization
Input 6 Power Tie detection Master will handle
signal
Input from PLC to detect if
Power Tie is active