Cisco Systems Cisco 3600 manual Wiring the DC-Input Power Supply in Cisco 3631 Routers, DC Input

Chapter 3 Installing the Router

Power Connections

Wiring the DC-Input Power Supply in Cisco 3631 Routers

If your router has a DC-input power supply, follow the directions in this section for proper wiring.

DC Wiring Requirements

ACisco 3631 router with a DC-input power supply requires copper wire and crimp-type terminals for the power connections. Table 3-2summarizes the wiring requirements.

You can connect a single DC power source to either the A input or the B input. If there are dual power sources, connect one source to the A input and one source to the B input; both sources must be the same polarity and voltage.

Table 3-2 DC Wiring Requirements for Cisco 3631 Routers

				DC Input	Safety Ground		Overcurrent
Installed Power Supply			DC Input	Wire Size	Wire Size	Wire Terminal (Lug)	Protection
Nominal 24/48 VDC1			24 - 36 V, 8 A,	AWG 14	AWG 14	AMP part number 324159-0,	15 A
Identified by a printed			positive or negative,	(2.0 mm2)	(2.0 mm2)	or equivalent	maximum
			single or dual sources
label near the DC wire
terminals:			36 - 60 V, 4 A,	AWG 18	AWG 14	Source DC: Molex part	15 A
			positive or negative,	(1.0 mm2)	(2.0 mm2))	number 19193-0009, or	maximum
INPUT +/-			single or dual sources			equivalent
24-36V		8 A				Ground: AMP part number
36-60V		4 A				324159-0, or equivalent
Nominal 48 VDC2			48 - 60 V, 4 A,	AWG 18	AWG 14	Source DC: Molex part	15 A
Identification stamped			positive or negative,	(1.0 mm2)	(2.0 mm2)	number 19193-0009, or	maximum
			single or dual sources			equivalent
near the DC wire
terminals:						Ground: AMP part number
						34119, or equivalent
INPUT -48 TO
-60V	4 A

1.The input voltage tolerance limits for nominal 24/48-V power supplies are 18 and 72 VDC.

2.The input voltage tolerance limits for nominal 48-V power supplies are 38 and 72 VDC.

Wiring Procedure for DC Input

To connect the router to a DC power source, perform the following steps:

Step 1 Remove power from the DC circuit. To ensure that power is removed from the DC circuit, locate the circuit breaker for the DC circuit, switch the circuit breaker to the OFF position, and tape the circuit-breaker switch in the OFF position.

Tip Secure all power cabling when installing this unit to avoid disturbing field-wiring connections.

Step 2 Strip the wires to the appropriate length for the terminals. The strip length is 1/8 to 3/16 inch (3 to 5 mm) for Molex number 19193-0009 and for AMP number 324159-0 terminals.

Step 3 Crimp the terminals to the DC power input wires.

Cisco 3600 Series Routers Hardware Installation Guide

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