Cisco Systems 7401ASR manual Connecting DC-Input Power

Chapter 2 Rack-Mounting, Tabletop Installation, and Cabling

Connecting Power

Connecting DC-Input Power

Note The color coding of the DC-input power supply leads depends on the color coding of the DC power source at your site. Make certain the lead color coding you choose for the DC-input power supply matches lead color coding used at the DC power source.

Warning When you install the unit, the ground connection must always be made first and disconnected last.

Warning Before completing any of the following steps, and to prevent short-circuit or shock hazards, 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.

Connect a DC-input power supply as follows:

Step 1 At the front of the router, check that the power switch is in the off (O) position.

Step 2 Ensure that no current is flowing through the DC power supply leads. 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 3 Using a wire stripper, strip approximately 0.55 inch (14 mm) from the –V and +V leads.

Figure 2-18 Attaching the Leads to the DC Plug and the DC Plug to the

DC Connector

B	B	50538
A	A

	4	3		5
	1
	2
1	DC plug		4	Single DC power connector
2	Lead		5	Dual DC power connector
3	+ and – embossed on connector

Step 4 Insert the –V and +V leads into the DC plug that ships with the Cisco 7401ASR router. The plug allows you to unplug the DC wires from the power supply without having to unscrew the leads.

a.Orient the plug (1) to the connector (4) as shown in Figure 2-18. The plug inserts only one way. Notice the symbols, + A – , embossed on the connector (3). Use the symbols and the orientation of the plug to guide you when inserting the leads into the plug.

	Cisco 7401ASR Installation and Configuration Guide
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