Cisco Systems ME 2400 manual Wiring the DC-Input Power Source

Appendix C Connecting to DC Power

Wiring the DC-Input Power Source

Complete these steps:

Step 1 Remove all paint or oxidation from the rack at the point of the grounding connection. Step 2 Use a 3/16-inch flat-head screwdriver to loosen the grounding screw on the rack. Step 3 Connect the wire to a ring lug (large enough for the rack screw to fit through).

Step 4 Use a 3/16-inch flat-head screwdriver and the screw to attach the ring lug to the rack. Step 5 Tighten the grounding screw on the rack over the ring lug.

Repeat these steps for each switch being installed.

Wiring the DC-Input Power Source

Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003

Warning This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than:

5 A Statement 1005

Warning A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022

Warning Only trained and qualified personnel should be allowed to install or replace this equipment. Statement 1030

Caution You must connect the Cisco ME DC switch only to a DC-input power source that has an input supply voltage from –36 to –72 VDC. If the supply voltage is not in this range, the switch might not operate properly or might be damaged.

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).

Cisco ME 2400 Ethernet Access Switch Hardware Installation Guide

OL-7678-01 C-5