Cudy IR04 EU — Industrial 4G With Serial, Relay and DIN-Rail Mounting
4G LTE Cat 4, dual SIM4x Ethernet, RS232/RS422/RS485DC 11-57 V, 802.3at/af PoE or passive PoE-40 to 75 °C, IP30, aluminium alloy
The IR04 is the fuller of Cudy’s two industrial 4G routers. Where the IR02 gives you two Ethernet ports and one serial pair, this one has four 10/100 ports, RS232, RS422 and RS485 on DB9 and a 6-pin connector, dry and galvanically isolated digital inputs, a relay output, an analogue input, and ignition sensing on the power connector for vehicle installations. It takes power three ways — 11 to 57 volts DC, 802.3at/af PoE, or passive PoE — runs from -40 to 75 °C in an aluminium alloy housing, and mounts on a DIN rail or a wall. Cellular is LTE Cat 4 with dual SIM; Wi-Fi is N300 on 2.4 GHz.
Compatibility — check before buying:
The Ethernet ports are 10/100, not gigabit, and Wi-Fi is N300 on 2.4 GHz only. Both are deliberate industrial choices behind a 150 Mbps cellular link, but they make this the wrong router for an office network. Cellular is Cat 4 — up to 150 Mbps down — not a 5G or Cat 12 product; if the site needs more throughput, tell us. The _EU suffix is the band variant for Europe; the same hardware sold for other regions carries a different band set and may not register here. Note the difference from the IR02: that model has two Ethernet ports, no PoE input and no published DIN-rail mounting. If the panel is rail-based or the router must be powered over Ethernet, this is the one that does it.
Best For
✓ Panel and cabinet installations on a DIN rail
✓ Vehicles and mobile plant — ignition sensing included
✓ Telemetry, SCADA and Modbus TCP gateways
✓ Sites where the router must be powered over Ethernet
✓ Machinery with RS232, RS422 or RS485 interfaces
✓ Remote sites needing dual-SIM redundancy
Key Features
Serial, digital and analogue in one box
RS232, RS422 and RS485 over DB9 and a 6-pin connector, dry and galvanically isolated digital inputs, a relay output and an analogue input. With serial port gateway and Modbus TCP, equipment with no network port reaches your systems directly.
Three ways to power it
11 to 57 volts DC covers 12 V vehicles, 24 V panels and 48 V supplies; 802.3at/af PoE or passive PoE lets a single Ethernet cable do both jobs where DC is awkward. Ignition sensing on the power connector shuts it down with the vehicle.
Redundancy on every path
Dual SIM slots plus failover between WAN, WISP and cellular, so the site stays connected when a carrier, a fixed line or a wireless link fails. VPN over WireGuard, OpenVPN, IPSec, PPTP or L2TP brings it back to your network.
Built for the environment
Aluminium alloy housing, -40 to 75 °C operating range, IP30, Level 4 EMC protection and shock and vibration resistance to EN 61373. 462 grams, DIN-rail or wall mountable.
Technical Specifications
| Identification |
| Brand |
Cudy |
| Model |
IR04, EU band variant |
| EAN / GTIN |
6971690793210 |
| Product Type |
Industrial 4G LTE Cat 4 Wi-Fi router |
| Region |
_EU denotes the European band variant — other regions use a different band set |
| Cellular and Wi-Fi |
| Standard |
4G LTE Cat 4 |
| Downlink |
Up to 150 Mbps |
| SIM Slots |
2x, with failover |
| Wi-Fi |
Wi-Fi 4, N300, 2.4 GHz. No 5 GHz band. |
| Failover |
Between WAN, WISP and cellular |
| Wired and Industrial Interfaces |
| Ethernet |
4x RJ45, 10/100 Mbps |
| Serial |
RS232, RS422 and RS485 — DB9 and 6-pin connector |
| Digital Input |
Dry and galvanically isolated |
| Analogue Input |
Yes |
| Output |
Relay output |
| Protocols |
Serial port gateway and Modbus TCP |
| Power and Environment |
| Power Input |
11-57 V DC, 802.3at/af PoE, or passive PoE |
| Ignition Sensing |
Yes, on the power connector |
| Operating Temperature |
-40 to 75 °C |
| Ingress Rating |
IP30 |
| EMC |
Level 4 EMC protection |
| Shock and Vibration |
Per EN 61373 |
| Housing |
Aluminium alloy |
| Weight |
462 g |
| Mounting |
DIN rail or wall |
| Management and Security |
| Management |
Web interface and Cudy app |
| VPN |
WireGuard, OpenVPN, IPSec, PPTP, L2TP |
| Warranty and Contents |
| Warranty |
1-Year Warranty (Singular) |
| Manufacturer Term |
Cudy does not publish a warranty term for this product on its website or in its documentation, and coverage terms vary by region. Singular’s direct warranty is 1 year; beyond that we assist you with the manufacturer’s warranty process for its full duration. |
| In the Box |
IR04 router, antennas, terminal connectors, mounting hardware, quick installation guide. |
Frequently Asked Questions
IR04 or IR02?
The IR04 has four Ethernet ports to the IR02’s two, adds RS422 alongside RS232 and RS485, adds an analogue input and ignition sensing, takes PoE as well as DC, is built in aluminium rather than plastic with Level 4 EMC instead of Level 3, and mounts on a DIN rail — which the IR02 does not publish. The IR02 is the smaller, cheaper box for a simpler job.
Can it be powered over Ethernet?
Yes. It accepts 802.3at/af PoE and passive PoE as well as 11-57 V DC. That is useful in a panel where a PoE switch is already present, or where running a DC supply to the mounting point is awkward.
Will it fit a DIN rail?
Yes, DIN-rail and wall mounting are both supported. This is one of the clear differences from the IR02, which Cudy does not publish DIN-rail mounting for.
What is ignition sensing for?
Vehicle installations. The router senses the ignition line on its power connector and can shut down or delay shutdown with the vehicle, rather than draining the battery when the engine is off.
What does _EU mean?
It is the European cellular band variant. An identical-looking unit sourced for another region carries different bands and may not register on a Cyprus network. If the equipment is going abroad, tell us where and we will confirm the right variant.
Singular Expert Insight
If you are choosing between Cudy’s two industrial routers, the decision usually comes down to three things, and none of them is the radio — both are LTE Cat 4 with N300 Wi-Fi. First,
mounting: the IR04 does DIN rail, the IR02 does not publish it. Second,
power: the IR04 accepts PoE, the IR02 is DC only. Third,
interfaces: four Ethernet ports against two, RS422 added, plus an analogue input and ignition sensing. If none of those apply to your job, the IR02 is the cheaper right answer. What both share is the thing that matters most at a remote site —
dual SIM failover and VPN back to base. As always, confirm the
_EU band variant, and tell us the equipment at the far end of the serial port; Modbus is common but not universal, and we would rather check than have you find out on site. More in our
router section.
Buyer’s Guide
Buy it if
You need a rugged 4G router in a panel or a vehicle, with serial and I/O interfaces, DIN-rail mounting and the option of PoE power.
Skip it if
The site is an ordinary office — the 10/100 ports and 2.4 GHz Wi-Fi will disappoint; or you need more than Cat 4 cellular throughput.
Also consider
Cudy IR02 for a smaller, cheaper industrial router without PoE input or DIN rail. Cudy LT300 for a plain 4G router for a house or office. Cudy POE200H if you want to power the IR04 over Ethernet from a non-PoE network.