Cisco 3900 series User Manual

3-25
Cisco 2900 and 3900 Series Hardware Installation
OL-18712-01
Chapter 3 Installing and Connecting the Router
Connecting Power
Warning This unit might have more than one power supply connection. All connections must be removed to
de-energize the unit. Statement 1028
Table 3-3 summarizes DC wiring requirements for all Cisco 3925 and Cisco 3945 routers.
Note For Cisco 3945 and Cisco 3945-NOVPN routers, the safety ground wire connection must be at the same
potential as the 0 V (return) connection.
Table 3-3 DC Wiring Requirements for Cisco 3900
DC Power Input
DC Input
Wire Size
Safety Ground
Wire Size
Wire Terminal
(Lug)
Overcurrent
Protection
24-36 VDC, 12 A,
positive or negative,
single source or dual
sources
AWG 10 AWG 10
minimum
Panduit No.
LCAS8-10F-L
30 A maximum
36-60 VDC, 8 A,
positive or negative,
single or dual source

Cisco 3900 series Specifications

General

Brand	Cisco
Model	3900 series
Category	Network Router
Language	English