EnerSys alpha LPS36, Техническое руководство

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0120011-J0 Rev M 18
Figure 6 — Shelf Connections
4�2�2 Shelf Connections and Indicators (19" and 23" only)
Connections to the load and local alarm-sending unit are conveniently located on the side of each shelf.
Fan power connector
Major alarm relay
Minor alarm relay
50-pin load
connectors
CAN connectors
Shelf ID rotary switch
J1
J2
4�2�3 Alarm Relays (Form C Contacts)
The converter shelf has an interface panel with terminal blocks for Major and Minor alarm outputs (Form C contacts),
which are controlled by the controller. The Major alarm relay is designed to “fail safe” to ensure the alarm is regis-
tered when power is removed
Figure 7 — Shelf Alarm LEDs
OFF : Ok, no alarms
Red : Major alarm
Yellow : Minor alarm
Major Alarm
The Major alarm relay de-energizes under any one of the following conditions:
• When two or more outputs have failed within a shelf
• When the DC input feed is below the normal operating voltage
• When the DC input feed is above the normal operating voltage
Minor Alarm
The Minor alarm relay is de-energized under any one of the following conditions:
• Single output has failed within a shelf
• Internal ambient temperature is out of range
Alarm LEDs
On the front of the interface panel, are two LEDs—one red and one yellow, which indicate the shelf alarm status
(Figure 7).
If a Major alarm is activated, it "resets" the Minor
alarm relay to an energized state.
NOTE: