Installation Guide-R03

C HAPTER 2 | Installing the Switch
Connecting to a Power Source
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CONNECTING TO A POWER SOURCE
The switch includes both AC- and DC-powered models.
CONNECTING DC POWER
An external -48 VDC power supply must be connected to the DC power socket
on the ES3528MV2-DC rear panel.
To connect the switch to a power source:
1. First verify that the external DC power supply can provide -36 to -60 VDC,
0.3 A minimum for the DC-powered switch.
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.
3. Use a wire stripper to carefully strip about a half an inch of the outer
insulation off the end of each wire, exposing the copper core.
C 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.
N 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.
N OTE : The wiring between the DC power supply and the switch must be
stranded copper wire within the range of 10 to 24 AWG.
N 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 13 on page 41. The
wiring should also be color coded according to local standards to ensure
that the input power and ground lines can be easily distinguished.