External Connection
990-4045a
Installation Guide APC Silcon 240-320kW 400V UPS 27
UPS Shut Down RS-232 Input or
Advanced Mode RS-232 Data RX In
Line Fail RS-232 Output or
Advanced Mode RS-232 Data TX Out
Unregulated
+24 VDC Output
Normally Open
Line Fail Signal
Normally Open
Low Battery Signal
Normally Closed
Line Fail Signal
Common
Chassis