Datasheet

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Cisco 2901
Cisco 2911
Cisco 2921
Cisco 2951
Power Supply (Platform Only)
(Watts)
Maximum End-Point PoE
Power Available from PoE
Power Supply (Watts)
130
200
280
370
Maximum End-Point PoE
Power Capacity with PoE Boost
(Watts)
N/A
750
750
750
DC Input Voltage
N/A
24 to 60 Vdc, autoranging
positive or negative
24 to 60 Vdc, autoranging
positive or negative
24 to 60 Vdc, autoranging
positive or negative
DC Input Current
N/A
(MAX) 8A (24V)
3.5A (60V)
(MAX) 12A (24V)
5A (60V)
(MAX) 12A (24V)
5A (60V)
Physical Specifications
Dimensions (H x W x D)
1.75 x 17.25 x 17.3 in.
(44.5 x 438.2 x 439.4
mm)
3.5 x 17.25 x 12 in.
(88.9 x 438.2 x 304.8
mm)
3.5 x 17.25 x 18.5 in.
(88.9 x 438.2 x 469.9
mm)
3.5 x 17.25 x 18.5 in.
(88.9 x 438.2 x 469.9
mm)
Rack Height
1RU (rack unit)
2RU
2RU
2RU
Rack-Mount 19 in. (48.3 cm)
EIA
Included
Included
Included
Included
Rack-Mount 23 in. (58.4 cm)
EIA
Optional
Optional
Optional
Optional
Wall-Mount (refer to installation
guide for approved orientation)
Yes
Yes
No
No
Weight with AC Power Supply
(No Modules)
13.4 lb (6.1 kg)
18 lb (8.2 kg)
29 lb (13.2 kg)
29 lb (13.2 kg)
Weight with AC PoE Power
Supply (No Modules)
14.3 lb (6.5 kg)
19 lb (8.6 kg)
30 lb (13.6 kg)
30 lb (13.6 kg)
Typical Weight Fully
Configured
16 lb (7.3 kg)
21 lb (9.5 kg)
34 lb (15.5 kg)
34 lb (15.5 kg)
Airflow
Front to side
Side to side
Back and Side to Front
Back and Side to Front
Optional Airflow Kit
N/A
Front to back
N/A
N/A
Environmental Specifications
Operating Conditions
Temperature: 5,906 feet
(1,800m) Maximum Altitude
32 to 104ºF (0 to 40ºC)
32 to 104ºF (0 to 40ºC)
32 to 104ºF (0 to 40ºC)
32 to 104ºF (0 to 40ºC)
Temperature: 9,843 feet
(3,000m) Maximum Altitude
32 to 77ºF (0 to 25ºC)
32 to 104ºF (0 to 40ºC)
32 to 104ºF (0 to 40ºC)
32 to 104ºF (0 to 40ºC)
Temperature: 13,123 feet
(4,000m) Maximum Altitude
N/A
32 to 86ºF (0 to 30ºC)
32 to 86ºF (0 to 30ºC)
32 to 86ºF (0 to 30ºC)
Temperature: Short-Term (per
NEBS) 5906 feet (1,800m)
Maximum Altitude
N/A
23°F to 122°F (-5 to
50°C)
N/A
23°F to 122°F (-5 to
50°C)
Altitude
10,000 ft (3,000m)
13,000 ft (4,000m)
10,000 ft (3,000m)
13,000 ft (4,000m)
Relative Humidity
10 to 85%
5 to 85%
10 to 85%
5 to 85%
Short-Term (per NEBS)
Humidity
N/A
5% to 90%, but not to
exceed 0.024 kg water/kg
of dry air
N/A
N/A
Acoustic: Sound Pressure
(Typical/Maximum)
41/53 dBA
51.8/62.9 dBA
54.4/67.4 dBA
54.4/67.4 dBA
Acoustic: Sound Power
(Typical/Maximum)
49/61 dBA
58.5/70.3 dBA
62.6/74.5 dBA
62.6/74.5 dBA
Non-Operating Conditions
Temperature
-40 to 158ºF
(-40 to 70ºC)
-40 to 176ºF
(-40 to 80ºC)
-40 to 158ºF
(-40 to 70ºC)
-40 to 158ºF
(-40 to 70ºC)
Relative Humidity
5 to 95%
5 to 95%
5 to 95%
5 to 95%