Cisco Systems Cisco ME 3400E Manual De Usuario

This procedure is for installing an DC-power-supply module into the PSU 1 power-supply slot. Repeat 
these steps to install a power-supply module in the PSU 2 power-supply slot.

To connect the switch to a DC-input power source, follow these steps:

An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure 
that no exposed portion of the DC-input power source wire extends from the terminal block plug. 
Statement 122

Before connecting or disconnecting ground or power wires to the chassis, ensure that power is 
removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel 
board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch 
handle of the circuit breaker in the OFF position. Use a voltmeter to test for 0 (zero) voltage at the 
power terminals on the chassis. Statement 196

Installation of the equipment must comply with local and national electrical codes.

The grounding architecture of this product is DC-isolated (DC-I).

We recommend that you use 18 AWG copper wiring for Network Equipment Building Systems (NEBS) 
installation. This guideline follows the standard guidelines for DC-power wiring in the central office.

You can use the grounding lug to attach a wrist strap for ESD protection during servicing.