Delta MCS-1800 - Manual (Page 24)

DELTA MCS-180 3U 0 Power Shelf
Installation, Operations and
Maintenance Manual
6-2
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 -.
6.7 Temperature and Alarm Connections
6.7.1 Battery Temperature Sensors
One (1) battery sensor cable is provided with each system. The connection method please refers 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 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.