Carrier Access Broadmore 1750 - Manual (Page 112)

6-14 Broadmore 1750 - Release 4.6
Electrical Installation
Broadmore Power Input Connector
Broadmore Power Input Connector
Power is provided as –48 VDC to the connection points in the rear of the chassis.
Voltage may be provided directly from the user’s power source. Optionally, the
Broadmore 1750 comes with a redundant AC power supply. The power connector on
the lower back of the chassis is shown below. The connector is a compression type in
which the wire is inserted in the lower opening and the compression screw above is
tightened to secure the wire. A small flathead screwdriver is required to secure the
wires.
Connecting –48 VDC Power
1. Identify the power cables and secure their power.
2. Use a Volt-Ohm Meter (VOM) to verify the voltage and polarity of the cable
wires.
3. Turn off power to the cables and use a VOM to verify there is no voltage
present.
4. Run the power cables to the connection point on the chassis rear as shown
above. Note there are two power rail inputs, A and B, as labeled.
5. Insert the cable wires and tighten the compression screws to secure the wires.
6. Restore power to the cables. Use the VOM to verify voltage is present at the
chassis connection points.
7. Turn off power to the cables until ready for the power-up sequence.
- 48VDC B RETURN
POWER
RETURN - 48VDC A