User manual

Static Transfer Switch
UNB
User Manual
Page 12 (28)
ELTEK VALERE DEUTSCHLAND ©2009 UM_UNB_E_R04
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X1
3.3.3 Connectors UNB 5.0 and UNB 12.5kVA
View from the rear: UNB 5.0/12.5kVA
Connector X1 (HAN-K4/8, socket outlet)
Pins (X1) Function
1 Source 1 (inverter)/Phase L1
2 Source 2 (substitute mains)/Phase L1
3 Source 1 & 2/ neutral
4 UNB Output/Phase L1
5 DC-supply / L+ (24 / 48 / 108 / 216V DC)
6 DC-supply / L- (24 / 48 / 108 / 216V DC)
7 Synchronization / SYNC-SIG
8 Synchronization / SYNC-STAT
9 Remote switch ON (+24V)
10 Indication relay general fault / NO
11 Indication relay general fault / COM*
12 Synchronization / SYNC-GND
*Function logic: OK = COM and NO closed
(Is equal to the programming “not inverted”)
REMARK: If the UNB works in combination with a single inverter or inverters in parallel operation it is necessary to
connect through the synchronization bus (contacts SYNC-GND→ SYNC-GND, SYNC-SIG→ SYNC-SIG and SYNC-
STAT→ SYNC-STAT) between the inverter(s) and the UNB.