Technical Specifications

Switch Specifications

The following table lists the environmental specifications for the Cisco MDS 9148T switch:

Table 1. Environmental Specifications for the Cisco MDS 9148T Switch

Description

Specification

Temperature, ambient operating

32 to 104°F (0 to 40°C)

Temperature, ambient nonoperating and storage

-40 to 158°F (-40 to 70°C)

Humidity (RH), ambient (noncondensing) operating

10 to 90%

Humidity (RH), ambient (noncondensing) nonoperating and storage

10 to 95%

Altitude, operating

-197 to 6500 ft (-60 to 2000 m)

The following table lists the physical specifications for the Cisco MDS 9148T switch.

Table 2. Physical Specifications for the Cisco MDS 9148T Switch

Description

Specification

Dimensions (HxWxD)

1.72 x 17.3 x 22.3 in. (4.37 x 43.94 x 56.64 cm) excluding PSU and fan module handles

Rack Space

Chassis requires 1 RU (1.75 in. or 4.45 cm)

Weight

18.73 lb (8.5 kg)

Fan Dimensions (WxH)

1.575 x 1.575 in. (4.0 x 4.0 cm)

Fan Slots Opening Dimensions (WxH)

1.614 x 1.602 in. (4.09 x 4.06 cm)

Power Supply

  • 650-W AC, port-side exhaust variant (up to 2 per switch)

  • 650-W AC, port-side intake variant (up to 2 per switch)

  • AC input—100 to 240 V AC (10% range)

  • Frequency—50 to 60 Hz (nominal)

Airflow

  • Back to front (toward ports) using port-side exhaust fans

  • Front to back (into ports) using port-side intake fans

  • 50 CFM (0.02 m3/s) through system fan assembly at 25°C

  • 100 CFM (0.04 m3/s) maximum

We recommend that you maintain a minimum air space of 2.5 in. (6.4 cm) between walls and chassis air vents and a minimum horizontal separation of 6 in. (15.2 cm) between two chassis to prevent overheating.

Power Specifications

General Power Supply Specifications

The following table lists the specifications for the Cisco MDS 9148T switch AC power supply:

Table 3. Power Supply Specifications

AC Input Power

Specification

AC input voltage

100 to 240 VAC

AC input frequency

Nominal = 50 to 60 Hz

Power supply output capacity

650 W

Output holdup time

20 ms

Power Supply Requirement Specifications

The following table provides a sample calculation of power for the Cisco MDS 9148T switch AC power supply:

Table 4. Power Dissipation for AC Power Supply

Power Mode

PSU

Traffic Rate

Temperature

Voltage

Optics Speed

Optics Number

Fan Trays

Power at 110V/60HZ (Watts)

Power at 220V/50HZ (Watts)

Typical

2

50%

25°C

Nominal

32G-SW

24

4

257

251

48

305

297

Max

2

100%

25°C

Nominal

32G-SW

24

4

267

260

32G-LW

48

323

315

40°C

32G-SW

322

315

55°C

32G-LW

374

348

Nominal + 5%

403

385

Power consumption at 25°C with 48 ports and SW optics at 100% load

2

100%

25°C

Nominal

32G-SW

48

4

267

260
Power consumption at 25°C with 48 ports populated with SW optics but idle (no traffic)

2

0%

25°C

Nominal

32G-SW

48

4

267

260
Table 5. Power Supply Fuse Information

Part Number

PID

Type

Fuse Rated AMP

I2T

Fuse Melting Time

341-100716-02

DS-CAC-650W-I=

Fast acting

12.5 A

400

1000 s@20 A, 0.1 s@56 A

341-100717-02

DS-CAC-650W-E=

Component Power Requirements and Heat Dissipation

Consider heat dissipation when sizing the air-conditioning requirements for an installation. The power and heat associated with a Cisco MDS 9148T 32-Gbps 48-Port Fibre Channel Switch varies based on the following considerations:

  • The environment (temperature) outside the chassis

  • Internal chassis temperature

  • Any hardware component failure in the chassis

  • Average switching traffic levels

The following table lists the power requirements and heat dissipation for the components of the Cisco MDS 9148T 32-Gbps 48-Port Fibre Channel Switch.

Table 6. Power Requirements and Heat Dissipation for the Cisco MDS 9148T 32-Gbps 48-Port Fibre Channel Switch

Module Type/Product Number

Power Required (watts)

Heat Dissipation (BTU/hr)

Input Current

85VAC(amps)

110VAC(amps)

220VAC(amps)

Cisco MDS 9148T 32-Gbps 48-Port Fibre Channel Switch

290 maximum

989

3.41

2.63

1.31