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28-Port Gigabit PoE Switch
28-Port Gigabit PoE Switch - Image 2

28-Port Gigabit PoE Switch

HD-U890-24G2G2F-300

● 24×10/100/1000Mbps PoE Ports & 2 Gigabit Ports & 2 SFP Ports
● 100-240V AC 50/60Hz
● Standard PSE Chip
● AI/Watchdog function
● Network Port Support 6KV Common Mode & 6KV Differencial Mode Surge Protection
● Power Board Support 6KV Common Mode & 2KV Differencial Mode Surge Protection

Download the datasheet

Why You Want It

IEEE802.3af/at

Compliant with both IEEE802.3af (PoE) and IEEE802.3at (PoE+) standards, and meets IEEE 802.3, 802.3u, 802.3ab, 802.3z, 802.3x standards for reliable performance.

Class A EMI/EMC Compliant

Certified to Class A industrial standard for EMI/EMC. Delivers strong resistance to electromagnetic interference.

6KV Surge Protection

6KV Common Mode & 6KV Differential Mode surge protection (RJ45 port)； 6KV Common Mode & 2KV Differential Mode surge protection (power board).

Standard PSE Chip

Standard PSE chip, smart power matching, compatible with all af/at devices – safe and reliable.

3 Modes + Watchdog

Normal（Standard switching, 100m）; VLAN(Port isolation, prevents broadcast storms); Extend(10Mbps, up to 250m，supported on ports 1-8); Watchdog(Auto‑reboots faulty devices, lowers maintenance).

PoE Max Indicator

Light off ：PoE power usage ＜90%; Light flash ：90%≤PoE power usage ≤95%; Light on ：PoE power usage ＞95%.

24 x Gigabit PoE ports + 2 x Gigabit uplink ports + 2 x Gigabit SFP ports

● Equipped with 24 x Gigabit PoE ports (30W per port, 300W total budget) and 2 x Gigabit RJ45 uplink ports + 2 x Gigabit SFP ports. Delivers 56Gbps switching capacity and 41.664Mpps packet forwarding rate.
● Built with standard PSE chip, Class A EMI/EMC compliant, and 6KV dual surge protection. Supports 3 operating modes (Normal / VLAN / Extend) + AI Watchdog.
● Note：Extend mode is supported on ports 1-8 only (up to 250m/10Mbps); ports 9-24 operate in standard Gigabit mode (100m).
24-port Gigabit PoE switch with 2 Gigabit RJ45 uplink ports, 2 Gigabit SFP ports, 300W PoE budget, 56Gbps switching capacity, AI Watchdog, VLAN Extend modes, and 6KV surge protection.

Smart PoE Management

One-Click Toggle (Link/PoE Button):Press the button to switch ports 1-24 indicators between two modes：Link/Data status(Green);PoE powering status(Yellow).
Gigabit PoE switch with smart PoE management and one-click Link PoE button to toggle port indicators between green Link Data status and yellow PoE power status for easy monitoring.

PoE Overload Protection

When total output power exceeds 5% of rated capacity (105%), the system automatically limits output. The last-plugged port powers off first – already running ports remain unaffected, ensuring critical devices stay online and preventing total system shutdown.
Gigabit PoE switch with PoE overload protection, automatic output limiting at 105 percent capacity, last-plugged port power-off priority, and stable operation for critical devices.

Specification

ModelHD-U890-24G2G2F-300
ProductPoE Switch with Standard PSE Chip
Ports
Ports28
PoE Port24, 10/100/1000Mbps;  RJ45 ports; Max. 30W Output of Single PoE Port
Uplink Port2*1000Mbps RJ45 ports & 2 Gigabit SFP ports
PWR IndicatorLight on: Powering
Light off: No Power
Mode(Slide Switch)Green light off: Normal/Default mode
Green light on: VLAN mode
Green ligh flash: Extend mode(Port 17-24)
Link/PoE ButtonIt is used to switch whether the 1-24 indicator indicate the Link/Data status or the PoE status; Default indicates Link/Data status
1-28  Indicator (Link & Data Status)Green light off:  Link is disconnected
Green light on:  Link is connected
Green light flash: Data Transmitting
1-24 Indicator (PoE Status)Yellow light off:  PoE not powering
Yellow light on:  PoE powering
PoE Max IndicatorLight off:  Indicates PoE power usage is less than 90%
Light flash: Indicates PoE power usage 90%≤P≤95%
Light on:  Indicates PoE power usage is greater than 95%
Standard
Network ProtocolIEEE802.3/802.3u/802.3ab/802.3z/802.3x
Performance
Switching Capacity56Gbps Full duplex
Packet Forwarding Rate41.664Mpps
Packet Buffer3Mb
Forwarding ModeStore-and-forward
MAC Address Table8K
VLANSupport
WatchdogSupport
PoE Overload ProtectionIf the total PoE output power exceeds 5% of the switch’s rated power, the output will be automatically limited. The last port plugged in will be the first to stop PoE power supply
Power Over Ethernet
PoE StandardIEEE802.3af, IEEE802.3at
PoE Power Supply1/2(+),3/6(-)
Transmission Distance0-100m/1000Mbps or Port 1-8 Max. 250m/10Mbps via Cat.5e or more under Extend mode
PoE FeatureAll ports support MDI/MDIX
General
Power SourceBult-in Power Supply
Input: 110-240VAC, 50/60Hz
PoE Power Budget300W
Power Consumption<5W
ESDAir discharge: 15KV
Contact discharge: 8KV
Surge Protecton-RJ45 PortCommon mode:  6KV
Differential mode/PoE :  6KV
Differential mode/Signal:  6KV
Surge Protecton -Power SupplyCommon mode: 6KV
Differential mode: 2KV
Working Temperature-10℃-50℃
Humidity10%-90% , non-condensing
Storage Temperature-40℃-70℃
ColorBlack
Net Weight1.9kg
Dimension(L×W×H)320*207*44mm (L*W*H)

Dimensions (mm)

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