Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide
Power Supply Specifications
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Power Supply Specifications

Table Of Contents

Power Supply Specifications

300 W AC-Input Power Supply (PWR-C49E-300AC-R)

300 W AC-Input Power Supply (PWR-C49E-300AC-F)

300 W AC-Input Power Supply Power Cords

300 W DC-Input Power Supply (PWR-C49-300DC)


Power Supply Specifications


This appendix provides the specifications for the AC-input and DC-input power supplies supported on the Catalyst 4948E switch.


Tip For additional information about the Cisco Catalyst 4948E and the Catalyst 4948E-F switches (including configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html


300 W AC-Input Power Supply (PWR-C49E-300AC-R)

The PWR-C49E-300AC-R 300 W AC-input power supply can be installed only in the Catalyst 4948E switch chassis. This power supply is not supported on the Catalyst 4948E-F switch. Figure A-1 shows the 300 W AC-input power supply with the major features identified.

Figure A-1 AC-Input Power Supply (PWR-C49E-300AC-R) Features

1

AC power switch

4

Power supply LEDs

2

Captive installation screw

5

Power supply handle

3

AC power cord receptacle

   

Table A-1 lists the specifications for the 300 W AC-input power supply (PWR-C49E-300AC-R).

Table A-1 300 W AC-Input Power Supply Specifications 

Item
Specification

AC-input type

Autoranging input with power factor correction (PFC).

Power factor correction is a standard feature. PFC reduces the reactive component in the source AC current allowing higher power factors and lower harmonic current components.

AC-input voltage

Low-line (120 VAC nominal)—85 VAC (min) to 132 VAC (max)

High-line (230 VAC nominal)—170 VAC (min) to 264 VAC (max)

AC-input current

4 A @ 100 VAC (maximum)

2 A @ 240 VAC (maximum)

AC-input frequency

47 to 63 Hz

Branch circuit requirements

Each chassis power supply should have its own dedicated, fused-branch circuit:

For North America—15 A

For International—Circuits sized to local and national codes

All AC power supply inputs are fully isolated.

Source AC can be out of phase between multiple power supplies in the same chassis, which means that PS1 can be operating from phase A and PS2 can be operating from phase B.

For high-line operation, the power supply operates with the line conductor wired to a source AC phase and the neutral conductor wired either to neutral or to another source AC phase as long as the net input voltage is in the range of 170 to 264 VAC.

Power supply output

25 A @+12 VDC

Output holdup time

20 ms minimum

kVA rating1

0.375 kVA

Power supply fan

One temperature-controlled, variable-speed fan

Airflow direction—Back to front

The power supply fan has four speed settings. The speed settings are dependent on the air temperature detected by the inlet air temperature sensor mounted in the chassis. See Table A-2 for inlet temperature ranges and corresponding fan speeds.

Power supply LEDs

 

INPUT OK

Green—The INPUT OK LED is lit green when the power supply has detected that the source AC voltage is within limits. The input voltage is Š 82 VAC ±3 VAC.

Red—The INPUT OK LED is red when either of the following two situations occurs:

In chassis that are equipped with dual power supplies, and both are powered on, either INPUT OK LED is lit red if its source AC voltage falls below 73 VAC (±3 VAC).

In chassis that are equipped with dual power supplies and one power supply is powered on and the other power supply is powered off, the INPUT OK LED is lit red, rather than unlit, on the power supply that is turned off.

Off—In chassis that are equipped with a single power supply, the INPUT OK LED is off when source AC voltage falls below 73 VAC (±3 VAC), is not present with the power on/off switch turned on, or the power supply is turned off.

OUTPUT OK

Green—The 12 VDC output is within margins (11.30 VDC < output voltage < 12.85 VDC).

Red—The OUTPUT OK LED is red when any of the following three situations occurs:

In chassis that are equipped with a single power supply, the 12 VDC output is out of tolerance (< 11.30 VDC or > 12.85 VDC).

In chassis that are equipped with dual power supplies and one power supply is powered on and the other power supply is powered off, the OUTPUT OK LED is lit red, rather than unlit, on the power supply that is turned off.

The OUTPUT OK LED is also lit red when a power supply fan failure is detected. A fan failure is triggered when the fan rotation drops below 4150 RPM ± 150 RPM.

Off—In chassis that are equipped with a single power supply, the OUTPUT OK LED is off when the power supply is turned off.

Weight

2 lb (0.9 kg)

1 The kVA rating listed for the power supply should be used as the sizing criteria for both UPS outputs as well as standard circuits and transformers to power a switch.


Table A-2 PWR-C49E-300AC-R Power Supply Inlet Temperature Versus Fan Speed

Fan Speed Level
Inlet Temperature (T)
(± 2°C)
Fan Speed (RPM) (±100RPM)

L1

-5°C < T £ 35°C

8900

L2

35°C < T £ 42°C

9800

L3

42°C < T £ 50°C)

11100

L4

T > 50°C

12700


300 W AC-Input Power Supply (PWR-C49E-300AC-F)

The PWR-C49E-300AC-F 300 W AC-input power supply can be installed only in the Catalyst 4948E-F switch chassis. This power supply is not supported on the Catalyst 4948E switch. Figure A-2 shows the 300 W AC-input power supply with the major features identified.

Figure A-2 AC-Input Power Supply (PWR-C49E-300AC-F) Features

1

AC power switch

4

Power supply LEDs

2

Captive installation screw

5

Power supply handle

3

AC power cord receptacle

   

Table A-1 lists the specifications for the 300 W AC-input power supply (PWR-C49E-300AC-F).

Table A-3 300 W AC-Input Power Supply (PWR-C49E-300AC-F) Specifications 

Item
Specification

AC-input type

Autoranging input with power factor correction (PFC).

Power factor correction is a standard feature. PFC reduces the reactive component in the source AC current allowing higher power factors and lower harmonic current components.

AC-input voltage

Low-line (120 VAC nominal)—85 VAC (min) to 132 VAC (max)

High-line (230 VAC nominal)—170 VAC (min) to 264 VAC (max)

AC-input current

4 A @ 100 VAC (maximum)

2 A @ 240 VAC (maximum)

AC-input frequency

47 to 63 Hz

Branch circuit requirements

Each chassis power supply should have its own dedicated, fused-branch circuit:

For North America—15 A

For International—Circuits sized to local and national codes

All AC power supply inputs are fully isolated.

Source AC can be out of phase between multiple power supplies in the same chassis, which means that PS1 can be operating from phase A and PS2 can be operating from phase B.

For high-line operation, the power supply operates with the line conductor wired to a source AC phase and the neutral conductor wired either to neutral or to another source AC phase as long as the net input voltage is in the range of 170 to 264 VAC.

Power supply output

25 A @+12 VDC

Output holdup time

20 ms minimum

kVA rating1

0.4 kVA

Power supply fan

One temperature-controlled, variable-speed fan

Airflow direction—Front to back

The power supply fan has four speed settings. The speed settings are dependent on the air temperature detected by the inlet air temperature sensor mounted in the chassis. See Table A-4 for inlet temperature ranges and corresponding fan speeds.

Power supply LEDs

 

INPUT OK

Green—The INPUT OK LED is lit green when the power supply has detected that the source AC voltage is within limits. The input voltage is Š 82 VAC ±3 VAC.

Red—The INPUT OK LED is red when either of the following two situations occurs:

In chassis that are equipped with dual power supplies, and both are powered on, either INPUT OK LED is lit red if its source AC voltage falls below 73 VAC (±3 VAC).

In chassis that are equipped with dual power supplies and one power supply is powered on and the other power supply is powered off, the INPUT OK LED is lit red, rather than unlit, on the power supply that is turned off.

Off—In chassis that are equipped with a single power supply, the INPUT OK LED is off when source AC voltage falls below 73 VAC (±3 VAC), is not present with the power on/off switch turned on, or the power supply is turned off.

OUTPUT OK

Green—The 12 VDC output is within margins (11.30 VDC < output voltage < 12.85 VDC).

Red—The OUTPUT OK LED is red when any of the following three situations occurs:

In chassis that are equipped with a single power supply, the 12 VDC output is out of tolerance (< 11.30 VDC or > 12.85 VDC).

In chassis that are equipped with dual power supplies and one power supply is powered on and the other power supply is powered off, the OUTPUT OK LED is lit red, rather than unlit, on the power supply that is turned off.

The OUTPUT OK LED is also lit red when a power supply fan failure is detected. A fan failure is triggered when the fan rotation drops below 7047 RPM ± 150 RPM.

Off—In chassis that are equipped with a single power supply, the OUTPUT OK LED is off when the power supply is turned off.

Weight

2 lb (0.9 kg)

1 The kVA rating listed for the power supply should be used as the sizing criteria for both UPS outputs as well as standard circuits and transformers to power a switch.


Table A-4 PWR-C49E-300AC-F Power Supply Inlet Temperature Versus Fan Speed

Fan Speed Level
Inlet Temperature (T)
(± 2°C)
Fan Speed (RPM) (±100RPM)

L1

-3°C < T £ 37°C

8700

L2

37°C < T £ 44°C

10700

L3

44°C < T £ 52°C

12700

L4

T > 52°C

14700


300 W AC-Input Power Supply Power Cords

Table A-5 lists the specifications for the AC power cords that are available for both of the 300 W AC-input power supplies. The table includes references to illustrations of the AC power cords.


Note All 300 W AC-input power supply power cords have an IEC60320/C15 appliance plug at one end. This plug connects to the AC-in receptacle on the power supply faceplate.


Table A-5 300 W AC-Input Power Supply Power Cords

Locale
Power Cord Part Number
AC Source Plug Type
Cordset Rating
Power Cord Reference Illustration

Argentina

CAB-IR2073-C15-AR=

(was CAB-7KACR=)

IRAM 2073

10 A, 250 VAC

Figure A-3

Australia, New Zealand

CAB-AS3112-C15-AU=

(was CAB-7KACA=)

SAA AS 3112

10 A, 250 VAC

Figure A-4

Continental Europe

CAB-CEE77-C15-EU=

(was CAB-7KACE=)

CEE 7/7

10 A, 250 VAC

Figure A-5

Italy

CAB-C2316-C15-IT=

(was CAB-7KACI=)

CEI 23-16/7

10 A, 250 VAC

Figure A-6

North America, Japan

CAB-US515-C15-US=

(was CAB-7KAC=)

NEMA 5-151

13 A, 125 VAC

Figure A-7

North America

CAB-N5K6A-NA=

NEMA 6-15P

10 A, 250 VAC

Figure A-8

South Africa, India

CAB-SABS-C15-IND=

BS 546
(SABS 164-1)

10 A, 250 VAC

Figure A-9

Switzerland

CAB-9K10A-SW=

(was CAB-7KACSW=)

SEV 1011

10 A, 250 VAC

Figure A-10

United Kingdom

CAB-BS1363-C15-UK=

(was CAB-7KACU=)

BS 13632

13 A, 250 VAC

Figure A-11

1 For Japan, ask your local electrical contractor to prepare the NEMA 5-20 power plug.

2 Plug contains a 13 A fuse.


Figure A-3 CAB-IR2073-C15-AR=, CAB-7KACR= (Argentina)

Figure A-4 CAB-AS3112-C15-AU=, CAB-7KACA= (Australia and New Zealand)

Figure A-5 CAB-CEE77-C15-EU=, CAB-7KACE= (Continental Europe)

Figure A-6 CAB-C2316-C15-IT=, CAB-7KACI= (Italy)

Figure A-7 CAB-US515-C15-US=, CAB-7KAC= (North America)

Figure A-8 CAB-N5K6A-NA (North America)

Figure A-9 CAB-SABS-C15-IND (South Africa, India)

Figure A-10 CAB-9K10A-SW=, CAB-7KACSW= (Switzerland)

Figure A-11 CAB-BS1363-C15-UK=, CAB-7KACU= (United Kingdom)

300 W DC-Input Power Supply (PWR-C49-300DC)

Figure A-12 shows the 300 W DC-input power supply with the major features identified. The PWR-C49-300DC DC-input power supply is supported only on the Catalyst 4948E switch chassis.

Figure A-12 300 W DC-Input Power Supply (PWR-C49-300DC)

1

Source DC terminal block

3

Power supply LEDs

2

Captive installation screw

4

Power supply handle


Table A-6 lists the specifications for the 300 W DC-input power supply (PWR-C49-300DC).

Table A-6 300 W DC-Input Power Supply Specifications 

Item
Specification

DC-input voltage

-48 VDC @ 8.33 A for nominal -48 V battery backup system (operating range: -40.5 VDC to -56 VDC)

-60 VDC @ 6.66 A for nominal -60 V battery backup system (operating range: -55 VDC to -72 VDC)

DC-input current

Nominal range is 6.66 A to 8.33 A

Power supply output capacity

300 W

Power supply output

25 A @ 12 VDC

Output holdup time

8 ms (minimum)

Heat dissipation

341 BTU/hour (power supply only)

Power supply LEDs

 

INPUT OK

Green—The INPUT OK LED is lit green when the power supply has detected that the source DC voltage is within limits. The input voltage is Š -38.25 VDC ±2.25 VDC.

Red—The INPUT OK LED is red when either of the following two situations occurs:

In chassis that are equipped with dual power supplies, and both power supplies are powered on, the INPUT OK LED is lit red if its source DC voltage falls below 33 VDC (±3 VDC).

In chassis that are equipped with dual power supplies and one power supply is powered on and the other power supply is powered off, the INPUT OK LED is lit red, rather than unlit, on the power supply that is turned off.

Off—In chassis that are equipped with a single power supply, the INPUT OK LED is off when source DC voltage falls below 33 VDC (±3 VDC), is not present with the power on/off switch turned on, or the power supply is turned off.

OUTPUT OK

Green—The 12 VDC output is within margins (11.30 VDC < output voltage < 12.85 VDC).

Red—The OUTPUT OK LED is red when any of the following three situations occurs:

In chassis that are equipped with a single power supply, the 12 VDC output is out of tolerance (less than 11.30 VDC or more than 12.85 VDC).

In chassis that are equipped with dual power supplies and one power supply is powered on and the other power supply is powered off, the OUTPUT OK LED is lit red, rather than unlit, on the power supply that is powered off.

The OUTPUT OK LED is also lit red when a power supply fan failure is detected. A fan failure is triggered when the fan rotation drops below 4150 RPM ±150 RPM.

Off—In chassis that are equipped with a single power supply, the OUTPUT OK LED is off when the power supply is turned off.

Power supply fan

One temperature-controlled, variable-speed fan

Airflow direction—Back to front

The power supply fan has four speed settings. The speed settings are dependent on the inlet air temperature. See Table A-7 for inlet temperature ranges and corresponding fan speeds.

Weight

2 lb (0.9 kg)


Table A-7 DC-Input Power Supply Inlet Temperature Versus Fan Speed

Fan Speed Level
Inlet Temperature (T)
(± 2°C)
Fan Speed (RPM) (±100RPM)

L1

-10°C < T £ 30°C

5100

L2

30°C < T £ 37°C

6400

L3

37°C < T £ 45°C

7700

L4

T > 45°C

9500