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S5700 Series Switches Hardware Description

This document provides an overall description of the S5700 hardware, helping you obtain detailed information about each chassis, card, power module, fan module, cable, and optical module.
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S5720S-28X-PWR-LI-AC

S5720S-28X-PWR-LI-AC

Version Mapping

Table 4-396 lists the mapping between the S5720S-28X-PWR-LI-AC chassis and software versions.

Table 4-396 Version mapping

Series

Model

Software Version
S5720S-LI S5720S-28X-PWR-LI-AC

V200R010C00 and later versions

Appearance and Structure

Figure 4-152 S5720S-28X-PWR-LI-AC appearance
1 Twenty-four PoE+ 10/100/1000BASE-T ports 2 Four 10GE SFP+ ports
3 One PNP button
NOTICE:

Applicable in V200R012C00 and later versions:

To restore the factory settings and reset the switch, hold down the button for at least 6 seconds.

To reset the switch, press the button.

Resetting the switch will cause service interruption. Exercise caution when you press the PNP button.

4 One console port
5 Ground screw
NOTE:
It is used with a ground cable.
6 Jack for AC power cable locking strap
NOTE:
The AC power cable locking strap is not delivered with the switch.
7 AC socket
NOTE:

It is used with an AC power cable.

- -

Port Description

10/100/1000BASE-T port
A 10/100/1000BASE-T Ethernet electrical port sends and receives service data at 10/100/1000 Mbit/s, and must use an Ethernet cable. Table 4-397 describes the attributes of a 10/100/1000BASE-T Ethernet electrical port.
Table 4-397 Attributes of a 10/100/1000BASE-T Ethernet electrical port

Attribute

Description

Connector type

RJ45

Standards compliance

IEEE802.3, IEEE802.3u, IEEE802.3ab

Working mode

10/100/1000 Mbit/s auto-sensing

Maximum transmission distance

100 m

10GE SFP+ port
A 10GE SFP+ Ethernet optical port supports auto-sensing to 1000 Mbit/s. It sends and receives service data at 1000 Mbit/s or 10 Gbit/s. Table 4-398 describes the attributes of a 10GE SFP+ Ethernet optical port.
Table 4-398 Attributes of a 10GE SFP+ port

Attribute

Description

Connector type

LC/PC

Optical port attributes

Depend on the optical module used

Standards compliance

IEEE802.3ae

Working mode

GE/10GE auto-sensing

Console port
The console port is connected to a console for on-site configuration. The port must use a console cable. The console port is used when a switch is powered on for the first time. For details about the attributes of a console port, see Table 4-399.
Table 4-399 Attributes of a console port

Attribute

Description

Connector type

RJ45

Standards compliance

RS-232

Working mode

Duplex Universal Asynchronous Receiver/Transmitter (UART)

Baud rate

9600 bit/s, 19200 bit/s, 38400 bit/s, 57600 bit/s, or 115200 bit/s

Default value: 9600 bit/s

Indicator Description

The S5720S-28X-PWR-LI-AC has similar indicators to those of the S5720-28X-PWR-LI-AC, except that the S5720S-28X-PWR-LI-AC does not have an RPS or USB indicator. For details, see Indicator Description.

Power Supply Configuration

The S5720S-28X-PWR-LI-AC has a built-in power module and does not support pluggable power modules. The built-in power module can provide 370 W PoE power, which ensures full PoE power on 24 ports in compliance with 802.3af or on 12 ports in compliance with 802.3at. The switch cannot connect to an RPS power supply.

Figure 4-153 shows the power supply mode of a built-in AC PoE power module (PWR). The PWR module receives AC power from an external power source and provides two outputs: 12 V and -53 V. The 12 V output is provided for the chassis, and the -53 V output is provided for PDs.
Figure 4-153 Power supply by a built-in AC PoE power module

L: live wire

N: neutral wire

PGND: protection ground

GND: 12 V reference ground

RTN: -53 V reference ground

Heat Dissipation

The S5720S-28X-PWR-LI-AC has two built-in fans for forced air cooling. The airflow direction is left-to-right.

NOTE:
This figure only shows the airflow direction and does not depict the actual device.

Technical Specifications

Table 4-400 lists technical specifications of the S5720S-28X-PWR-LI-AC.

Table 4-400 Technical specifications

Item

Description

Memory (RAM)

512 MB

Flash

512 MB in total. To view the available flash memory size, run the display version command.

Mean time between failures (MTBF)

41 years

Mean time to repair (MTTR)

2 hours

Availability

> 0.99999

Service port surge protection

Common mode: ±7 kV

Power supply surge protection

±6 kV in differential mode, ±6 kV in common mode

Dimensions (H x W x D)

43.6 mm x 442.0 mm x 310.0 mm (1.72 in. x 17.4 in. x 12.2 in.)

Weight (with packaging)

5.2 kg (11.45 lb)

Stack ports

Twenty-four 10/100/1000BASE-T ports and four 10G SFP+ ports

RTC

Not supported

RPS

Not supported

PoE

Supported

Rated voltage range

100 V AC to 240 V AC, 50/60 Hz

Maximum voltage range

90 V AC to 264 V AC, 47 Hz to 63 Hz

Maximum power consumption (100% throughput, full speed of fans)

  • Not providing the PoE function: 42.7 W
  • 100% PoE loads: 448.5 W (system power consumption: 78.9 W, PoE: 369.6 W)
Typical power consumption (30% of traffic load)
  • Tested according to ATIS standard
  • EEE enabled
  • No PoE power consumption

29.5 W

Operating temperature

0°C to 45°C (32°F to 113°F) at an altitude of 0-1800 m (0-5906 ft.)
NOTE:

When the altitude is 1800-5000 m (5906-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (722 ft.).

Short-term operating temperature

-5°C to +55°C (23°F to 131°F) at an altitude of 0-1800 m (0-5906 ft.)

NOTE:

When the altitude is 1800-5000 m (5906-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (722 ft.).

The equipment can operate beyond the normal operating temperature range for a short-term period, but the following conditions must be met:
  • The equipment operates at a temperature of over 45°C (113°F) consecutively for at most 96 hours in one year.
  • The equipment operates at a temperature of over 45°C (113°F) for a total of no more than 360 hours in one year.
  • The equipment operates at a temperature of over 45°C (113°F) for no more in 15 times in one year.
The equipment may be damaged or experience unexpected exceptions if any of the preceding limits is exceeded.

The equipment cannot start when the temperature is lower than 0°C (32°F). The maximum distance of optical modules used in these conditions cannot exceed 10 km.

Storage temperature

-40°C to +70°C (-40°F to +158°F)

Noise under normal temperature (27°C, sound power)

< 49.1 dB(A)

Relative humidity

5% to 95%, noncondensing

Operating altitude

0-5000 m (0-16404 ft.)

Certification

  • EMC certification
  • Safety certification
  • Manufacturing certification

Part number

98010597
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Updated: 2019-08-19

Document ID: EDOC1000013597

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