Delta MCS-600 Power Shelf
Installation, Operations and
Maintenance Manual
REV.: 03
6-2
Customer Specification Confidential
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 –48 VDC. Connect the positive battery cable(s)
to the BATT + and connect the negative battery cable(s) to the BATT -.
6.7 Temperature and Alarm Connections
6.7.1 Battery Temperature Sensors
One (1) battery sensor cable is provided with each system. The connection method please refer to section
5.4.
6.7.2 External 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 1 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 AUX. PDU signal cables to the rear of the shelf which are mark “EXT. Breaker
trip signal I/P” connector. Please refer to Figure7.
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.
