Technical Specifications

Switch Specifications

The following table lists the environmental specifications for the switch:

Table 1. Environmental Specifications

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 switch:

Table 2. Physical Specifications

Description

Specification

Dimensions (HxWxD)

1.72 x 17.3 x 18 in. (4.37 x 43.94 x 45.72 cm) excluding PSU and fan module handles

Rack Space

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

Weight

21.8 lb (9.9 kg) unpopulated

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

500-W

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

  • 500-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)

  • 80 PLUS Platinum certified

1200-W

  • 1200W AC/ HVAC/ HVDC Bidirectional airflow (2 per switch)

  • Part Number: DS-CAC-1200W

  • AC input: 90V to 305V

  • DC input: 192V to 400V

  • Frequency – 50 to 60 Hz (nominal)

  • 80 PLUS Platinum certified

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.

To prevent the switch from overheating and shutting down, you must position the air intake for the switch in a cold aisle.

Power Supply Requirement Specifications

The following table provides a sample calculation of power for the switch AC power supply:

Table 3. Power Dissipation for AC Power Supply

Power Mode

PSU

Traffic Rate

Temperature

Voltage

Optics Speed

Optics Number

Fan Trays

Power at

110 V/60 Hz (Watts)

Power at

220 V/50 Hz (Watts)

Typical

2

50%

25°C

Nominal

32G-SW

24

4

211

205

48

4

247

240

64G-SW

24

4

235

228

48

4

295

286

Max

2

100%

25°C

32G-SW

24

4

213

207

32G-SW

48

4

248

241

64G-SW

24

4

236

229

64G-SW

48

 4

301

292

40°C

32G-SW

48

4

286

278

64G-SW

48

4

323

314
Table 4. Power Supply Fuse Information

PID

Fuse Type

Fuse Rating (Amp)

I2t (Amps2seconds)

Fuse Melting Time

DS-CAC-500W-I

Time-lag

15

534

4 min@15 A

2 min@30 A

DS-CAC-500W-E

660

30 min@22.5 A

0.15 s@50 A

Component Power Requirements and Heat Dissipation

Consider heat dissipation when sizing the air-conditioning requirements for an installation. The power and heat associated with 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 switch:

Table 5. Power Requirements (maximum) and Heat Dissipation for the Switch

Module Type/Product Number

Power Required (Watts)

Heat Dissipation (BTU/hr)

Input Current

110 VAC (Amps)

220 VAC (Amps)

Cisco MDS 9148V-K9 64-Gbps 48-port Switch

314 (Max)

986

2.94

1.42