Installation Guide

Table Of Contents

HAPTER

| Installing the Switch

Connecting to a Power Source

– 41 –

CONNECTING TO A POWER SOURCE

This switch supports both AC and DC power conversion modules.

CONNECTING DC POWER

When a -48 VDC power conversion module is installed in the switch, an external

DC power supply must be connected to the DC power connection on the left side

of the front panel.

To connect the switch to a power source:

1. First verify that the external DC power supply can provide -36 to -72 VDC,

4 A minimum for the -48 VDC power conversion module.

2. Prepare two wires for each power source to be used (A or B). Use 10 to 24

AWG stranded copper wire. Make sure these wires are not plugged into the

power source.

AUTION

Before wiring the DC plug or connecting power to the switch,

ensure that power to the feed lines is turned off at the supply circuit

breaker or disconnected from the power bus.

OTE

To provide adequate circuit protection between the DC power

supply and the switch, all intermediate wiring and circuitry should be

rated to carry a load at least two times the maximum rating for this

switch.

OTE

The wiring between the DC power supply and the switch must be

stranded copper wire within the range of 10 to 24 AWG.

OTE

Wiring for the power input terminals on the switch are described

below. Wiring of the DC power supply terminals depends on the

equipment in use on the local site, but should be wired in such a way as

to meet the input requirements shown in Figure 11 on page 42. The

wiring should also be color coded according to local standards to ensure

that the input power and ground lines can be easily distinguished.

OTE

When using two power conversion modules with the switch,

either AC or DC modules can be used – both AC, both DC, or one AC

and one DC.