Delta MCS-1800 manual Temperature and Alarm Connections, Signal I/P connector

DELTA MCS-180 3U 0 Power Shelf

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 –48VDC. Connect the positive battery cable(s) to the BATT + and connect the negative battery cable(s) to the BATT -.

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
MAJ	Major
HVSD	High Voltage Shutdown
HV	High Voltage Alarm
LV	Low Voltage Alarm
LVD	Low Voltage Disconnect
FA	Fuse Alarm
MIN	Minor

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.

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