Dry Contact Card - Huawei UPS5000-E-12 User Manual

UPS5000-E-(40 kVA-320 kVA)
User Manual
Silk Screen
BSC

2.4.2.3 Dry contact card

The dry contact card allows the UPS to control and monitor the battery circuit breaker (BCB)
box and implement remote emergency power-off (EPO). The maximum voltage/current is 12
V/200 mA or 5 V/100 mA.
Figure 2-12
Figure 2-12 Dry contact card
Table 2-3
Table 2-3 Ports on the dry contact card
Port
-
BCB
Issue 10 (2015-09-15)
Description
UPSs require N parallel cables so that at least two parallel cables are
connected to each UPS, which improves connection reliability.
The BSC port is used in a dual-bus system to synchronize output
frequencies and phases between UPS systems, ensuring that two buses
can switch with each other.
shows the signal ports on the dry contact card.
describes the ports on the dry contact card.
Silk Screen Description
BTG Detects battery ground
failures
0 V Secondary side ground
GEN Detects D.G. mode
0 V Secondary side ground
OL Detects the BCB box
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Copyright © Huawei Technologies Co., Ltd.
2 Overview
Status
Status:
 Connected: battery grounding
failure
 Disconnected: no battery
grounding failure
The initial status is Disconnected.
Status:
 Connected: D.G. mode
 Disconnected: non-D.G. mode
The initial status is Disconnected.
Status:
 Grounded: BCB box
connected
 Floated: BCB box not
connected
The initial status is Grounded.
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