4.2.5 Output dry contact X7 J2 (option)
The schematic diagram of output dry contact port J2 is shown in Figure 4.9 below and described in Table 4.8 below. The
input dry contacts of this series provide 24 V / 10 mA signals, and the output dry contacts are relay contacts that can accept
24 V / 500 mA signals. The BCB drive signal can provide 12 V / 10 mA signal.
Figure 4.9 Dry Contact Port J2
Pin Name Meanings Pin Name Meanings
1 Dry in
The input dry contact can be defined, and the
default setting is the load test switch LLBB
state.
2 BCB_Drive4
BCB4 drive signal
3 GND 4 GND
5 Dry in
The input dry contact can be defined, and the
default setting is the state of the main input
switch RIB/Q1.
6 Dry in
The input dry contact can be defined, and
the default setting is BCB3 status feedback.
7 GND 8 GND
9 NO
The output dry contact can be defined, and the
default setting is bypass power supply.
10 Dry in
The input dry contact can be defined, and
the default setting is BCB3 enable signal.
11 COM 12 GND
13 NC 14 Dry in
The input dry contact can be defined, and
the default setting is the state of the bypass
input switch BIB/Q2.
15 NO
The output dry contact can be defined, and the
default setting is battery mode.
16 GND
17 COM 18 NA
NA
19 NC 20 GND
Table 4.8 Description of Dry Contact Port J2
NOTE: The programmable dry contacts must be set in Paramset.
When using parallel system, if you want to use the dry contact function of the external maintenance isolation circuit breaker,
the auxiliary contact signal must be connected to the respective dry contacts on all single racks in the parallel system at the
same time.
46 Proprietary and Confidential ©2023 Vertiv Group Corp. 4 Electrical Installation
Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual
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