Cisco Router 3600 Hardware Installation Manual page 80

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
A Cisco 3631 router with a DC-input power supply requires copper wire and crimp-type terminals for
the power connections.
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
Installed Power Supply
1
Nominal 24/48 VDC
Identified by a printed
label near the DC wire
terminals:
INPUT +/-
24-36V 8 A
36-60V 4 A
2
Nominal 48 VDC
Identification stamped
near the DC wire
terminals:
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:
Remove power from the DC circuit. To ensure that power is removed from the DC circuit, locate the
Step 1
circuit breaker for the DC circuit, switch the circuit breaker to the OFF position, and tape the
circuit-breaker switch in the OFF position.
Secure all power cabling when installing this unit to avoid disturbing field-wiring connections.
Tip
Strip the wires to the appropriate length for the terminals. The strip length is 1/8 to 3/16 inch (3 to 5 mm)
Step 2
for Molex number 19193-0009 and for AMP number 324159-0 terminals.
Crimp the terminals to the DC power input wires.
Step 3
Cisco 3600 Series Routers Hardware Installation Guide
3-30
Table 3-2
DC Input
DC Input Wire Size
24 - 36 V, 8 A, AWG 14
positive or negative, (2.0 mm
single or dual sources
36 - 60 V, 4 A, AWG 18
positive or negative, (1.0 mm
single or dual sources
48 - 60 V, 4 A, AWG 18
positive or negative, (1.0 mm
single or dual sources
summarizes the wiring requirements.
Safety Ground
Wire Size Wire Terminal (Lug)
AWG 14 AMP part number 324159-0,
2 2
) (2.0 mm ) or equivalent
AWG 14 Source DC: Molex part
2 2
) (2.0 mm )) number 19193-0009, or
equivalent
Ground: AMP part number
324159-0, or equivalent
AWG 14 Source DC: Molex part
2 2
) (2.0 mm ) number 19193-0009, or
equivalent
Ground: AMP part number
34119, or equivalent
Chapter 3 Installing the Router
Overcurrent
Protection
15 A
maximum
15 A
maximum
15 A
maximum
OL-2056-05