User manual

Static Transfer Switch

UNB

User Manual

Page 13 (28)

3.3.4 Connectors UNB 23.0kVA

View from the rear: UNB 23.0kVA

Connector X1 Connector X2

(HAN-K4/8, socket outlet)

Pins (X1)

Function

Pins (X2)

Function

1 Source 1 (inverter)/Phase L1 1 Source 1 (inverter)/Phase L1

2 Source 2 (substitute mains)/Phase L1 2 Source 2 (substitute mains)/Phase L1

3 Source 1 & 2/ neutral 3 No connection

4 UNB Output/Phase L1 4 UNB Output/Phase L1

5 DC-supply / L+ (24 / 48 / 108 / 216V

DC)

5 No connection

6 DC-supply / L- (24 / 48 / 108 / 216V DC) 6 No connection

7 Synchronization / SYNC-SIG 7 No connection

8 Synchronization / SYNC-STAT 8 No connection

9 Indication relay general fault / NC 9 Remote switch ON (+24V)

10 Indication relay general fault / NO 10 No connection

11 Indication relay general fault / COM* 11 No connection

12 Synchronization / SYNC-GND 12 No connection

*Function logic: fault = COM and NC closed

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.