UPS5000-S-1200 kVA
User Manual
2 Overview
Issue 04 (2019-06-25)
Copyright © Huawei Technologies Co., Ltd.
26
2.3.5.3 Dry Contact Card
Appearance
Figure 2-15
Dry contact card
Table 2-6
Functions of control signal ports on the dry contact card
Silk Screen Bypass
Unit
Power
Unit
Description
Status
Initial Status
BTG
Reserved
In use:
Controls
the power
unit.
Port for detecting battery
grounding faults
Connected:
battery grounding
fault
Disconnected: no
battery grounding
fault
Disconnected
0V
Port for signal ground
GEN
In use:
Controls
the entire
UPS
system.
Reserved
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
Reserved
In use:
Controls
the power
unit.
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_DRV
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
In use:
Controls
Reserved
Emergency power-off
(EPO) port
If the normally open
(NO) port is
Disconnected