Electrical Connections—UPS
31 Liebert
®
eXM
™
3.4.3 Liebert BDC Interface
The Liebert BDC interface is on the Auxiliary Terminal Block at J26. Refer to Figure 15 for circuit
details.
3.4.4 Battery Cabinet Interface Connectors
The battery cabinet interface is on the Auxiliary Terminal Block at J22. Refer to Figure 17 for circuit
details.
Figure 17 Battery cabinet interface—J22
Table 7 Liebert BDC interface
Position Name
Description
J26.1 Q1 STA The main input switch status signal
J26.5 Q2 STA The bypass input switch status signal
J26.9 Q3 STA External maintenance switch status signal
J26, 3, 7, 9 GND Dry ground
These contacts cannot be active unless they are set via software.
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 80 and 200 feet (25-60m), respectively.
NOTE
Refer to SL-25653, the Liebert eXM Bypass Distribution Cabinet manual for the Liebert BDC
wiring.
Table 8 Battery cabinet interface—J22
Pin Name Description
1 12V_DRV BCB driver signal
3 BCB STATUS BCB state signal
5 GND_DRY Dry ground
7 BCB_ON BCB on line signal
9NC NC
11 GND_DRY Dry ground
13 TMP_BATT External Battery temperature
15 12V_A Power
17 GND_DRY Dry ground
19 BATT_GND_FAULT Battery ground fault signal
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 80 and 200 feet (25-60m), respectively.
J22
111133155177199
2 4 6 8 10 12 14 16 19 20
12V_DRV
BCB_ON
GND_DRY
12V_A
GND_DRY
TMP_BATT
BCB STATUS
GND_DR
Y
BATT_GND_FAULT
NC
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