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UPS5000-H-(400 kVA-800 kVA)
User Manual (100 kVA Power Module)
Table 4-7 Functions of control signal ports on the dry contact card
Silk Screen
BTG
0V
GEN
0V
BCB_OL
BCB_STA
BCB_DRV
BCB_0V
EPO_NO
EPO_12V
EPO_NC
EPO_12V
SWITCH
STATUS_OUT
SWITCH
STATUS_0V
Issue 02 (2021-04-22)
Signal Description
Port for monitoring battery
grounding failures
Port for signal ground
Port for detecting the diesel
generator (DG) mode
Port for signal ground
Port for monitoring the
battery circuit breaker (BCB)
box
Port for monitoring the BCB
Port for controlling BCB trip.
When the voltage is +12 V,
the BCB trips.
Port for signal ground
If the NO port is connected
to the EPO_12V port, EPO is
triggered.
+12 V
If the NC port is
disconnected from the
EPO_12V port, EPO is
triggered.
+12 V
Port for monitoring the UPS
output circuit breaker
Port for signal ground
Copyright © Huawei Technologies Co., Ltd.
4 Component Description
Status
Description
● Closed: There is
a battery
grounding
failure.
● Open: There is
no battery
grounding
failure.
● Closed: DG
mode
● Open: non-DG
mode
● Grounded: BCB
box connected
● Disconnected:
BCB box not
connected
● Closed: The BCB
is ON.
● Open: The BCB
is OFF.
● 0 V: BCB not
tripped
● 12 V: BCB
tripped
Closing the EPO
port triggers EPO.
Opening the EPO
port triggers EPO.
● Closed: The UPS
output circuit
breaker is ON.
● Open: The UPS
output circuit
breaker is OFF.
Initial
Status
a
Open
a
Open
Grounde
d
Open
0 V
Open
Closed
a
Closed
35
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