Emerson MPR15 Series, MPR25 user manual DC cabling, Control and monitoring signals

70 Low voltage disconnect

DC cabling

The DC cabling from the batteries, or shelf, to the Low Voltage Disconnect unit must be connected manually. Figure 25 illustrates the connections to be made. The “Installation and start up procedure” chapter indicates the sequence to be followed when the unit is installed in the power shelf.

Figure 25 - Low voltage disconnect connections

2 x 10 AWG WIRES

To Battery NEG

XK3 Contactor

2 x 10 AWG WIRES To Load

Control and monitoring signals

The control and monitoring signals for the Low Voltage Disconnect unit are shown below. These signals are accessible on the terminal block in the unit. The “Installation and start-up procedure” describes how to interconnect the LVD in an embedded shelf application.

Figure 26 - Low voltage control and monitoring signals

LVD Terminal

block J1

20 AWG wire

8

7

6

5

4

3

2

1

LV ALM NO

LV ALM C

LV ALM NC

LV ALM NO

LVD ALM C

LVD ALM NC

-48 VDC

BAT GRD (RTN)

To Alarm Monitor

To Discharge or Sensing Ckt

UM5C06B / C ( 169-2071-500 ) P0711722 Standard 10.00 May 2001