Cisco Systems 2691 quick start Be connected first and disconnected last. Statement, + B

Warning	The illustration shows the DC power supply terminal block. Wire the DC power supply as illustrated. The proper
	wiring sequence is ground to ground, positive to positive, and negative to negative. The ground wire should always
	be connected first and disconnected last. Statement 239
Warning	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
Caution	Do not overtorque the terminal block contact screws. Recommended torque is 8.0 ± 0.5 in-lb (0.9 ± 0.05 N-m).

Figure 8 DC Power Connections

Negative DC output

Terminal block

Positive DC input

Terminal block

A + + B

-DC, input B Return, input B Safety ground Return, input A -DC, input A

A + + B

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Return, input B +DC, input B Safety ground +DC, input A Return, input A

Step 5 Install the plastic covers over the terminal block. (See Figure 9.)

Step 6 Secure the wires using cable ties as shown in Figure 9. The chassis has a cable-tie attachment below and to the right of the terminal block.

Step 7 Turn on power to the DC circuit.

Figure 9 Wire Routing and Attachment

Cable tie

TD	RD	LP	AL
	SEE		CD
	MANUAL
			BEFORE
			INSTALLATION

Plastic covers

DSU 56K

SEE MANUAL BEFORE INSTALLATION

From DC power source

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Connecting Routers to the Cisco Redundant Power System

If your router uses the Cisco Redundant Power System (RPS), refer to the Cisco RPS Hardware Installation Guide for instructions about the power connections. To locate these documents, see the “Where to Go Next” section on page 23.

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