Polycom DOC2237A manual To connect to the -48DC power system

MGC Hardware and Installation Manual

To connect to the -48DC power system:

1.Make sure the power switch is OFF. Turn off the DC power distribution unit.

2.Using the three wires 10 AWG cable running from the DC power distribution unit, connect the black wire into the -48IN terminal block and the red wire to the -48V RTN terminal block.

3.Connect the green or green-yellow wire to the system single-point “Ground” screw.

COM

Ground

	ON
	OFF
	+
-48V	-48V
IN	RTN

ON

OFF

+

-48V -48V

IN RTN

If the unit is rack mounted, the single-point ground on the MCU must be connected to the rack with a single conductor and attached as to prevent loosening.

When using bare conductors, they must be coated with an appropriate antioxidant compound before crimp connections are made. Tinned, solder-plated or silver plated connectors do not have to be prepared in this manner.

4.Turn on the DC power distribution unit.

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