Wiring The Dc-Input Power Supply In Cisco 3620 And Cisco 3640 Routers; Wiring The Dc-Input Power Supply In Cisco 3631 Routers; Wiring The Dc-Input Power Supply In Cisco 3660 Routers; Dc Wiring Requirements - Cisco Router 3600 Hardware Installation Manual

Power Connections
Depending on the type of router you are installing, see one of the following procedures:
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Wiring the DC-Input Power Supply in Cisco 3620 and Cisco 3640 Routers

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

DC Wiring Requirements

Cisco 3620 and Cisco 3640 routers with a DC-input power supply require copper wire for the power
connections.
For Cisco 3640 routers, DC power connections require crimp-type ring terminals or spade terminals with
upturned lugs.
Table 3-1 DC Wiring Requirements for Cisco 3620 and Cisco 3640 Routers
DC Power Source DC Input
Nominal 48 VDC –48 to –60 VDC
1. The input voltage tolerance limits for nominal 48-V power supplies are 38 and 72 VDC.
Wiring Procedure for Nominal 48 VDC Input
To connect the router to a DC power source, perform this procedure.
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.
Secure all power cabling when installing this unit to avoid disturbing field-wiring connections.
Tip
For Cisco 3620 routers, strip the wires to the appropriate length for the terminal block on the power
Step 2
supply.
For Cisco 3640 routers, crimp appropriate ring terminals or spade terminals to the DC power input wires.
Strip the wires to the appropriate length for the terminals used. The following warning applies to
Cisco 3640 routers:
When stranded wiring is required, use approved wiring terminations, such as closed-loop or
Warning
spade-type terminals with upturned lugs. These terminations should be the appropriate size for the
wires and should clamp both the insulation and conductor. Statement 1002
Connect the DC power input wires to the terminal block as shown in
Step 3
Cisco 3600 Series Routers Hardware Installation Guide
3-28
Wiring the DC-Input Power Supply in Cisco 3620 and Cisco 3640 Routers, page 3-28
Wiring the DC-Input Power Supply in Cisco 3631 Routers, page 3-30
Wiring the DC-Input Power Supply in Cisco 3660 Routers, page 3-32
DC Input Wire Size
1
, 4 A AWG 14 (2.0 mm
Safety Ground Wire Size
2
) AWG 14 (2.0 mm
Chapter 3 Installing the Router
Overcurrent Protection
2
) 15 A, maximum
Figure 3-43 or Figure 3-44.
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