Overview of Pin Connections
J108 pin connections: 1: Normally open EPO
2: Normally open EPO return
3: Normally closed EPO
4: Normaly closed EPO return
5: +24 V SELV supply
6: SELV ground
J106 pin connections:
8: Ext. charging control return
7: External control of charging
6: Q3 active return
5: Q3 active
4: Battery measurement supply*
3: Battery unit quantity*
2: Max. battery temperature*
1: Battery measurement return*
* Should be used with APC XR Battery Enclosures
J106
Pins 1 to 4 are for battery measurement (only applicable to MGE Galaxy 3500 XR Battery Enclosures).
Pins 5 and 6 are for external maintenance bypass Q3 (auxiliary switch N/C type). When Q3 is closed, signals are fed back to the UPS controller.
Pins 7 and 8 are for external charge control. When 7 and 8 are closed, the UPS charges batteries with a
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