ATOP EHG7704-4PoE Industrial Managed Ethernet Switch
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The ATOP EHG7704-4PoE is a slim DIN-rail managed Layer 2 switch with four 10/100/1000BASE-T(X) RJ45 ports, all PoE++ to IEEE 802.3af/at/bt, supplying up to 90 W per port within a 240 W budget. It runs from -40 to +75°C in an IP30 aluminium housing on dual redundant power inputs, and suits PTZ cameras, Wi-Fi access points and railway cabinets.
PoE++ Ports and Budget4 × IEEE 802.3bt PoE++ RJ45, up to 90 W per port, 240 W total
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Description
The EHG7704 Series is an Industrial Grade Managed Gigabit Ethernet PoE Switch. UL, CE and FCC certified, it provides highly reliable, fault tolerant, extremely fast network connections in harsh environments.
Versatile high performance: Within its compact DIN-Rail slim type housing design, the EHG7704 series allows you to choose between different port combinations: 1G BASE-T(X) RJ45, IEEE 802.3af/at/bt compliant PoE RJ45, 1G BASE-X SFP and 2.5G Base-X SFP, achieving maximal network performance to suit your exact needs.
High power and redundancy: All models have two terminal blocks to provide dual redundant power inputs with reverse polarity protection, enabling stand-alone fault alarm systems.
Reliability and security: Set up a reliable network environment through RSTP, ERPS Rings and MRP (Manager/Client) redundancy and keep equipment connected all the time, even in case of temporary network breakdowns. And to prevent network intrusions, EHG7704 supports user account, password policy, and authentication interface
managements functions that comply with the IEC62443 standard.
Industry-specific features: Having undergone environmental testing to ensure reliable performance under a variety
of power supply conditions, this switch series is fully compliant for today’s demanding railway applications, as well as complying with essential ground equipment standards. It can also function as an IEEE 1588 hardware-based boundary or transparent clock, offering precise transmission for time-sensitive processes.
APPLICATION CASES
As the capabilities of connected devices continue to improve with technologies like 5G and Wi-Fi 6, networks must also be able to handle faster transmission speeds. 2.5 Gigabit Ethernet (2.5 GbE) supports speeds between 1Gbps and 10Gbps, achieving upgrade for network performance without a complete infrastructure overhaul.
The EHG77xx switch is equipped with 2.5 Gbps SFP slots, making it a powerful tool for connecting advanced applications such as high-resolution CCTV and public Wi-Fi. It can replace slower switches in existing topologies, allowing old and new devices to operate at their full potential.
EHG7704-4PoE specifications
| RJ45 Ports | 4 × 10/100/1000BASE-T(X), all PoE++ |
|---|---|
| Fibre (SFP) Slots | None on the -4PoE variant |
| PoE Ports | 4 × IEEE 802.3af/at/bt (PoE++) |
| PoE Per Port | Up to 90 W (PoE++) |
| PoE Power Budget | 240 W |
| Switching Type | Layer 2 managed Gigabit, static routing supported |
| Redundancy Protocols | ITU-T G.8032 ERPS, STP, RSTP, MSTP |
| Time Synchronisation | IEEE 1588v2 hardware-based transparent clock (E2E) or boundary clock |
| Management | SNMPv1/v2c/v3, Modbus TCP |
| Network Features | IEEE 802.1Q VLAN, IEEE 802.1p QoS, LACP port trunking, IGMPv1/v2/v3 snooping, DHCP Option 66/67/82, IPv4/IPv6, GARP/GVRP/GMRP |
| Security Features | IEEE 802.1X authentication, ACLs, user account and password policy functions based on IEC 62443 |
| Input Voltage | 9-57 V, PoE operation from 45 V |
| Power Redundancy | Dual redundant inputs on two terminal blocks, reverse polarity protection |
| Relay Output | Yes, for stand-alone fault alarm |
| Operating Temperature | -40 to +75°C |
| Storage Temperature | -40 to +85°C |
| Housing | Slim aluminium |
| Ingress Protection | IP30 |
| Mounting | DIN rail |
| Dimensions | 25 × 163 × 138 mm |
| Certifications | EN 50155 / EN 50121-4; UL/EN/IEC 60950-1 and/or 62368-1 safety; UL, CE, FCC; NEMA TS2 on demand |
Specifications taken from the manufacturer datasheet.
Which version do I need?
This page is the EHG7704-4PoE: four Gigabit RJ45 ports, all PoE++, and no SFP slots. ATOP's 2025 brochure lists four codes in this slim family: EHG7704 (4 × non-PoE RJ45), EHG7704-4PoE (4 × PoE++ RJ45, 240 W budget), EHG7706-225SFP (4 × non-PoE RJ45 plus 2 × 100/1000/2500 Mbps SFP) and EHG7706-4PoE-225SFP (4 × PoE++ RJ45 plus 2 × 100/1000/2500 Mbps SFP, 240 W budget). Choose the EHG7704-4PoE when the switch powers cameras or access points over copper only; choose the EHG7706-4PoE-225SFP if you also need fibre or 2.5 Gbps uplinks. None of the codes is region-specific, so a UK buyer chooses on port mix and PoE alone.
Typical applications for the EHG7704-4PoE
- PTZ and high-resolution IP cameras needing up to 90 W PoE++
- Public Wi-Fi access points in smart-city street cabinets
- Railway onboard and trackside cabinets (EN 50155 / EN 50121-4)
- Space-limited control cabinets that need a slim DIN-rail switch
- Edge switch in ERPS or RSTP redundant rings
- Outdoor enclosures operating from -40 to +75°C
Complete the stack
Products that work with this one — connect it, power it, and get it online.
EHG7704-4PoE — frequently asked questions
How many ports does the EHG7704-4PoE have, and are they all PoE?
Four 10/100/1000BASE-T(X) RJ45 ports, all PoE++ to IEEE 802.3af/at/bt. It has no SFP slots; the EHG7706-4PoE-225SFP adds 2 × 100/1000/2500 Mbps SFP slots to the same four PoE++ ports.
What is the PoE power budget?
ATOP's 2025 brochure lists a 240 W PoE budget for the EHG7704-4PoE, and PoE++ can drive devices that need up to 90 W, such as PTZ cameras. Four ports at a full 90 W would exceed 240 W, so plan the combined load against the total budget.
What power supply does it need?
The input range is 9-57 V, with PoE operation from 45 V upwards. Two terminal blocks give dual redundant power inputs with reverse polarity protection, and a relay output supports stand-alone fault alarms.
What temperature range is it rated for?
Operating temperature is -40 to +75°C and storage is -40 to +85°C, in an IP30 aluminium housing for DIN-rail mounting.
Which redundancy and timing protocols does it support?
ITU-T G.8032 ERPS rings plus STP, RSTP and MSTP. It also works as an IEEE 1588v2 hardware-based transparent or boundary clock for time-sensitive traffic.
Is it approved for railway and traffic use?
ATOP's 2025 selection guide ticks EN 50155 / EN 50121-4 for the EHG7704 and lists NEMA TS2 as available on demand. It is also UL, CE and FCC certified.
How much does the ATOP EHG7704-4PoE Industrial Managed Ethernet Switch cost in the UK?
The ATOP EHG7704-4PoE Industrial Managed Ethernet Switch is supplied to order and priced on application. Send a quote request and we confirm the price and lead time in writing, usually the same working day. No account is needed. Indiott is a UK distributor invoicing with VAT (PSI Technologies Ltd, VAT GB 730 2340 83).
What is the lead time and delivery cost for the ATOP EHG7704-4PoE Industrial Managed Ethernet Switch?
The ATOP EHG7704-4PoE Industrial Managed Ethernet Switch is supplied to order. We confirm the lead time in writing with your quote, before you commit to anything. UK delivery is a flat £14.25 per order ex VAT, whatever the weight or how many items you order. We ship to GB and the EU and provide a VAT invoice with every order.
