Module And Router Power Consumption - Cisco 2900 Series Installation Manual

Chapter 1 Overview of the Routers
Table 1-9 Cisco 2900 Series and Cisco 3900 Series Field Replaceable Unit Power Options
Router AC +
Model AC POE DC
2901 X X —
2911 X X X
2921 X X X
2951 X X X
3925 X X X
3925E X X X
3945 X X X
3945E X X X
1. Must have RPS or POE boost installed.
2. Internal RPS means that and additional power supply can be added to the PS2 slot.
3. Uses external Cisco Redundant Power System 2300 with an adapter inserted in the chassis.
4. Dual DC means two separate DC inputs to the same power supply.
5. Uses Cisco Redundant Power System 2300 as 100% power boost. Internal power supply does not supply any boost. In this configuration
there is no POE redundancy.
Table 1-10 Cisco 2900 series and Cisco 3900 series POE Power Ratings
Router Model
Power Supply 2901
Internal POE 130 W
Internal POE —
Boost
Internal —
DC+POE
External POE —
Boost

Module and Router Power Consumption

Cisco 2900 series and Cisco 3900 series ISRs have energy efficiency features that reduce power
consumption. Some of the energy efficiency features are controlled by the hardware, whereas other
energy efficiency features are controlled by the software.
Hardware Features
•
Hot Internal External
1 2
Swap RPS RPS
— —
X —
X —
X —
X X
X X
X X
X X
2911 2921
200 W 280 W
— —
160 W —
750 W 750 W
High-efficiency AC power supplies.
Dual Internal
3 4
DC POE
— X
X — X
X — X
X — X
— — X
— — X
— — X
— — X
2951 3925
370 W 520 W
— 1040 W
— —
750 W —
Cisco 2900 Series and 3900 Series Hardware Installation Guide
Hardware Features
Internal External Internal
POE POE DC +
5
Boost Boost POE
— — —
— X X
— X —
— X —
X — —
X — —
X — —
X — —
3925E 3945
520 W 520 W
1040 W 1040 W
— —
— —
3945E
520 W
1040 W
—
—
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