Chapter 2: Installation
Wiring and Powering on an DC Powered Unit
To provide power for a DC powered switch, perform the following steps:
1.Before you attach wires to the DC terminal block at the rear of the switch, review the following warning:
Warning
As a safety precaution, install a circuit breaker with a minimum value of 15 Amps between the equipment and the DC power source.
Always connect the wires to the LAN equipment first before you connect the wires to the circuit breaker. Do not work with HOT feeds to avoid the danger of physical injury from electrical shock. Always be sure that the circuit breaker is in the OFF position before connecting the wires to the breaker. E9
A tray cable is required to connect the power source if the unit is powered by centralized DC power. The tray cable must be a UL listed Type TC tray cable and rated at 600 V and 90 degrees C, with three conductors, minimum 14 AWG. E24
2.On the rear side of the chassis is a DC terminal block. Starting from the left side of the terminal block, identify the positive, frame ground, and negative terminals using the symbols beneath the terminal block or the illustration in Figure 25.
FOR CENTRALIZED DC
POWER CONNECTION,
INSTALL ONLY IN A
RESTRICTED AREA
Positive
DC | INPUT |
| Negative |
Ground | |
Figure 25. Positive, Ground, and Negative Terminals
3.With a
± 0.039 in.).
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