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Battery Disconnect Circuit Breakers (if furnished) External Alarm Connections
If ordered, the battery disconnect circuit breakers are factory wired to an alarm card located at the top of the
relay rack. The alarm card provides resistive battery and Form-C relay contacts for connection to external
alarm circuits.
If any battery disconnect circuit breaker is in the OFF position, resistive battery is provided at terminal 1 of J3
on the alarm card. Also, relay contacts open between terminals 2 and 3 of J3 and close between terminals 3
and 4 of J3 located on the alarm card. Refer to Figure 4.
Figure 4:
Battery Disconnect Circuit Breaker Alarm Card
4
3
N.O.
Com.
Vertiv
| NetSure Battery Rack System (-48 VDC) Installation Manual (Section 6045) | Rev. E
Top of Relay Rack
Alarm Card
Front
J3
2
1
Resistive Battery
N.C.
Notes:
Relay shown in deenergized state.
Relay energizes during alarm condition.
N.O. (Normally Open Contact)
Com. (Common)
N.C. (Normally Close Contact)
Terminal Block (J3) accepts a wire size in the
range of 26AWG to 14AWG (solid or stranded).
Recommended Torque (J3): 0.5 to 0.6 Nm.
12
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