DELTA
Installation, Operations and
Maintenance Manual
2.While connecting the battery cables inside the distribution module, make sure the system is completely disenergized (that is, the AC lines are turned off and the battery cables are disconnected at the battery end).
3.The system voltage (rectifier output voltage) is
6.7Temperature and Alarm Connections
6.7.1Battery Temperature Sensors
One (1) battery sensor cable is provided with each system. The connection method please refers to section 5.4.
6.7.2External Alarm Connections
1.Table 21 Alarm Terminal Block Pin Assignments
Alarm | Description |
ACF | AC Fail |
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MAJ | Major |
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HVSD | High Voltage Shutdown |
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HV | High Voltage Alarm |
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LV | Low Voltage Alarm |
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LVD | Low Voltage Disconnect |
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FA | Fuse Alarm |
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MIN | Minor |
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2.Each alarm connection is provided with a normally close relay contact. This contact is capable of carrying 0.5 Amp DC at 30VDC on a continuous basis.
3.Warning: All external circuits connected to these alarm relay terminals must be secondary and properly isolated from the incoming line.
6.8 | Connect the PDU signal cables to the rear of the shelf which are mark “EXT. Breaker trip |
| signal I/P” connector. |
| The “FUSE ALM” LED on the front panel of ALU will light up when the breaker open. |
6.9 | AC High Voltage Aux. Relay output wiring |
The connection point of “AC High Voltage Trigger Relay” which is on the rear of shelf will close when the AC input voltage is higher than the setting value normally it’s open.