FusionModule2000 Smart Modular Data Center
Product Description
5 Power Supply and Distribution System
Issue 06 (2020-05-21)
Copyright © Huawei Technologies Co., Ltd.
33
5.2.1.4.3 Dry Contact Card
The dry contact card allows the UPS to detect and manage the switch status of the battery
system (including the external battery switch) and implement remote emergency power-off
(EPO).
Figure 5-27
Dry contact card
Table 5-5
Ports on the dry contact card
Silk
Screen
Description
Status
Initial Status
BTG
Port for detecting battery
grounding faults
Connected: battery
grounding fault
Disconnected: no
battery grounding
fault
Disconnected
0V
Port for signal ground
GEN
Port for detecting diesel
generator (D.G.) mode
Connected: D.G.
mode
Disconnected:
non-D.G. mode
Disconnected
0V
Port for signal ground
BCB_OL
Port for detecting the BCB
box
Grounded: BCB
box connected
Disconnected:
BCB box not
connected
Grounded
BCB_STA Port for monitoring the
battery switch
Connected: battery
switch ON
Disconnected:
battery switch
OFF
Disconnected
BCB_DR
V
Controls battery circuit
breaker trip. When the
voltage is +12 V, the circuit
breaker trips.
0 V: battery
switch not tripped
12 V: battery
switch tripped
0 V
BCB_0V
Port for signal ground
EPO_NO
Emergency power-off
(EPO) port
If the normally open
(NO) port is
connected to the
EPO_12V port, EPO
is triggered.
Disconnected
EPO_12V
+12 V