SMC Networks SMC7824M/ESW manual Connecting to a Power Source, Connecting DC Power

INSTALLING THE SWITCH

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.

Warning: 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.

Notes: 1. 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 (see “Power Supply” on page C-2).

2.The wiring between the DC power supply and the switch must be stranded copper wire within the range of 10 to 24 AWG.

3.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 3-7 “DC Plug Connections” on page 3-12.The wiring should also be color coded according to local standards to ensure that the input power and ground lines can be easily distinguished.

4.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.

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