Site Environment - Cisco 3800 Series Quick Start Manual

General Site Requirements
The device is designed for connection to TN and IT power systems. Statement 1007
Warning
The AC power supply autoselects either 110 V or 220 V operation. All routers include a 6-foot
(1.8-meter) electrical power cord. A label near the power inlet indicates the correct voltage, frequency
(AC-powered systems only), and current draw for the router.
Table 1
Table 1 Power Requirements for Cisco 3800 Series Routers
Router Power Supply
Cisco 3825 AC
without IP
phone power
output
DC
Cisco 3825 AC
with IP phone
power output
Cisco 3845 AC
without IP
phone power
output
DC
Cisco 3845 AC
with IP phone
power output

Site Environment

Cisco 3800 series routers should normally be installed in an equipment rack. (For instructions, see
"Installing Cisco 3800 Series Routers in an Equipment
layout of your equipment rack or wiring room are extremely important considerations for proper
operation. Equipment placed too close together, inadequate ventilation, and inaccessible panels can
cause malfunctions and shutdowns, and can make maintenance difficult. Plan for access to both front
and rear panels of the router.
Cisco 3800 series routers operate at a temperature of 32 to 104 degrees F (0 to 40 degrees C) and a
humidity of 5 to 95 percent (noncondensing).
When planning your site layout and equipment locations, remember the precautions described in the next
section,
environmentally caused shutdowns. If you are experiencing shutdowns or an unusually high number of
errors with your existing equipment, these precautions may help you isolate the cause of the failures and
prevent future problems.
Preinstallation Requirements and Planning for Cisco 3800 Series Routers
4
lists power requirements for Cisco 3800 series routers.
Input Power
100 to 240 VAC
3 A at 110 V; 2 A at 230 V
47 to 63 Hz
24 to 60 VDC, positive or negative, autoranging
12 A at 24 V; 5 A at 60 V
100 to 240 VAC
8 A at 110 V; 4 A at 230 V
47 to 63 Hz
100 to 240 VAC
4 A at 110 V; 2 A at 230 V
47 to 63 Hz
24 to 60 VDC, positive or negative, autoranging
19 A at 24 V; 8 A at 60 V
100 to 240 VAC
9 A at 110 V; 4 A at 230 V
47 to 63 Hz
"Site Configuration," to help avoid equipment failures and reduce the likelihood of
Input Voltage
Tolerance Limits
85–264 VAC
18–72 VDC
85–264 VAC
85–264 VAC
18–72 VDC
85–264 VAC
Rack.") The location of your router and the
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