Description

Huawei CloudEngine S5731S-L4T2S-RUA Remote Unit (4-Port Gigabit)

The Huawei CloudEngine S5731S-L4T2S-RUA is an essential, ultra-compact Gigabit Remote Unit (RU) designed for simple and cost-effective network expansion. This non-PoE model provides 4 x 10/100/1000Base-T downlink ports, making it the perfect choice for connecting workstations, desktop PCs, and office equipment in a Huawei Simplified Network environment.

Key Features

Cost-Effective Gigabit Expansion: Provides 4 dedicated Gigabit Ethernet ports for high-speed wired connectivity without the added cost of PoE components.
Dual SFP Uplinks: Equipped with 2 x GE SFP ports, offering fiber-optic backhaul for high-bandwidth, long-distance connection to the central switch and support for ring or redundant topologies.
Zero-Configuration Setup: Completely managed by the central switch. No need for independent IP allocation or complex local CLI configuration—truly plug-and-play.
Whisper-Quiet Fanless Design: With no moving parts, this unit operates in total silence (0 dB), ideal for placement directly on desks or in quiet office settings.
Green Energy Design: One of the most energy-efficient models in the S5731 series, featuring ultra-low power consumption.

Performance

Forwarding performance: 9Mpps
Switching capacity: 12/120 Gbps

Compatibility & Accessories

Power Adapter: Includes a standard external 12V DC power adapter (local plug options available).
Optical Modules: Fully compatible with Huawei e-SFP-GE-SX-MM850 and SFP-GE-LX-SM1310 modules.
Mounting Kits: Comes with versatile brackets for wall-mount, desk-mount, or DIN rail installation.
Central Switch Compatibility: Works seamlessly with CloudEngine S6730-H, S5731-H, and S12700E series central switches.

Ideal Use Cases

Standard Office Cubicles: Providing high-speed internet to desktop computers and laptops that do not require PoE.
Network Upgrades: Quickly adding ports to a room without needing to run multiple new copper cables from the server room.
Cost-Sensitive Projects: Where the high-end features of PoE or hybrid-fiber are not required, but Huawei’s reliable simplified management is still desired.

Specification

Item	Specification
Dimensions without packaging (H x W x D) [mm(in.)]	Basic dimensions (excluding the parts protruding from the body): 27.0 mm x 185.0 mm x 115.0 mm (1.06 in. x 7.28 in. x 4.53 in.) Maximum dimensions (the depth is the distance from ports on the front panel to the parts protruding from the rear panel): 27.0 mm x 185.0 mm x 115.0 mm (1.06 in. x 7.28 in. x 4.53 in.)
Dimensions with packaging (H x W x D) [mm(in.)]	82.0 mm x 342.0 mm x 228.0 mm (3.23 in. x 13.46 in. x 8.98 in.)
Chassis height [U]	0.61 U
Chassis material	Metal
Weight without packaging [kg(lb)]	0.72 kg (1.59 lb)
Weight with packaging [kg(lb)]	1.02 kg (2.25 lb)
Typical power consumption [W]	4.88 W (device) 5.08 W (device + power adapter)
Typical heat dissipation [BTU/hour]	16.65 (device) 17.33 (device + power adapter)
Maximum power consumption [W]	5.06 W (device) 5.26 W (device + power adapter)
Maximum heat dissipation [BTU/hour]	17.27 (device) 19.75 (device + power adapter)
Static power consumption [W]	2.62 W
MTBF [years]	83.23 years
Availability	> 0.99999
Noise at normal temperature (acoustic power) [dB(A)]	Noise-free (no fans): < 30
Noise at normal temperature (acoustic pressure) [dB(A)]	Noise-free (no fans): < 20
Number of card slots	0
Number of power slots	0
Number of fans modules	0
Redundant power supply	Not supported
Long-term operating temperature [°C(°F)]	-5°C to +45°C (23°F to 113°F) at an altitude of 0-1800 m (0-5906 ft.)
Restriction on the operating temperature variation rate [°C(°F)]	When the altitude is 1800-5000 m (5905.44-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (721.78 ft.). The device cannot start when the temperature is lower than 0°C (32°F). The operating temperature of a device ranges from -5°C to +45°C (23°F to 113°F) when the device uses the following optical modules: – GE optical modules with a transmission distance of less than or equal to 10 km
Storage temperature [°C(°F)]	–40°C to +70°C (–40°F to +158°F)
Long-term operating relative humidity [RH]	5% RH to 95% RH, non-condensing
Long-term operating altitude [m(ft.)]	0–5000 m (0–16404 ft.)
Storage altitude [m(ft.)]	0-5000 m (0-16404 ft.)
Power supply mode	Power adapter
Rated input voltage [V]	Power adapter input: 100–240 V AC; 50/60 Hz Power adapter output: 12 V DC
Input voltage range [V]	Power adapter input: 90–290 V AC; 47–63 Hz
Maximum input current [A]	1 A
Memory	–
Flash memory	–
Console port	Not supported
Eth Management port	Not supported
USB	Not supported
RTC	Not supported
RPS input	Not supported
Service port surge protection [kV]	Common mode: ±6 kV
Power supply surge protection [kV]	Power adapter: ±6 kV in differential mode and ±6 kV in common mode
Ingress protection level (dustproof/waterproof)	IP20
Types of fans	None
Heat dissipation mode	Natural heat dissipation
Airflow direction	–
PoE	Not supported
Certification	EMC certification Safety certification Manufacturing certification

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