Cisco Systems ME 3400 appendix Console

Appendix C Connecting to DC Power

Wiring the DC-Input Power Source

Caution The Cisco ME-3400G-12CS-DC switch has two DC power supplies. They are labelled PS1 and PS2, and each power supply has an A and B input. When connecting power to both PS 1 and PS 2, connect only a single input (A or B) to each power supply).

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

Step 1 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.

Step 2 Locate the terminal block plug (see Figure C-6).

Figure C-6 Terminal Block Plug

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Step 3 Identify the positive and negative feed positions for the terminal block connection. The wiring sequence is positive to positive and negative to negative for both the A and the B feed wires.

The front panel of the switch identifies the positive and negative positions for both the A and B feed wires (See Figure C-7.)

Figure C-7 Positive and Negative Positions

SYSTEM

SYSTEM

+	+
A
	B
INPUT -36
	–	-72 V
CURRENT
	2 – 1A

CONSOLE

132858

Figure C-7shows a Cisco ME-3400-24TS-DC. The ME-3400G-12CS-DC switch has two DC power supplies (labelled PS 1 and PS 2). Each power supply has two inputs (labelled A and B). When connecting an input to both PS 1 and PS 2, only a single input (A or B) should be connected to each power supply.

Cisco ME 3400 Ethernet Access Switch Hardware Installation Guide

C-6 OL-7677-02