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Milesight, Milesight 4G Routers
Milesight UR35-L0GEU-W Industrial 4G Router with Wi-Fi
The Milesight UR35 (UR35-L04EU-W) is an industrial 4G LTE Cat 4 router with dual SIM failover and 2.4 GHz Wi-Fi. It combines five Ethernet ports, RS232 and RS485 serial, and isolated digital I/O in a rugged IP30 metal enclosure for M2M and IoT field sites.
Key Features:
– 4G LTE Cat 4 across EU bands, up to 150 Mbps down and 50 Mbps up, with 3G and 2G fallback
– Dual SIM with automated failover between two carriers
– Wi-Fi 802.11 b/g/n at 2.4 GHz, access point or client mode, up to 15 clients
– Five 10/100 Ethernet ports (1 WAN + 4 LAN), 1.5 kV isolation
– 1 x RS232 and 1 x RS485 serial on a 3.5 mm terminal block
– 1 isolated digital input and 1 isolated digital output
– NXP ARM Cortex-A7 processor, 128 MB RAM, 128 MB flash, microSD slot
– Modbus RTU to TCP gateway, MQTT, DLMS, SNMP and TR069
– OpenVPN, IPsec, WireGuard, ZeroTier, GRE, L2TP, PPTP and DMVPN
– IP30 metal build, -40 to +70 C, 9 to 48 V DC input
£178.00 Excl VAT
Milesight UR35-L04EU-W With WiFi
The Milesight UR35-L04EU-W (UR35-L04EU-W) is an industrial 4G LTE Cat 4 router with dual SIM failover and 2.4 GHz Wi-Fi. It reaches up to 150 Mbps download and 50 Mbps upload across EU LTE bands, with 3G and 2G fallback. Five 10/100 Ethernet ports, RS232 and RS485 serial, and isolated digital I/O make it a compact field gateway for M2M and IoT sites. An NXP ARM Cortex-A7 processor and an IP30 metal enclosure rated from -40 to +70 C suit cabinet and roadside installs. An embedded Python SDK lets you run logic on the device.
Key features
- 4G LTE Cat 4: up to 150 Mbps download and 50 Mbps upload, with 3G and 2G fallback.
- Dual SIM: two Mini SIM (2FF) slots with automated failover between carriers.
- Wi-Fi: 802.11 b/g/n at 2.4 GHz, access point or client mode, up to 15 clients.
- Five Ethernet ports: 1 WAN and 4 LAN at 10/100 Mbps, with 1.5 kV isolation.
- Serial: 1 x RS232 and 1 x RS485 on a 3.5 mm terminal block, 300 to 230400 bps.
- Digital I/O: 1 isolated input and 1 isolated output for field signalling.
- Industrial processor: NXP ARM Cortex-A7 at 528 MHz, 128 MB RAM, 128 MB flash.
- Protocol support: Modbus RTU to TCP gateway, MQTT, DLMS client, SNMP and TR069.
- VPN suite: OpenVPN, IPsec, WireGuard, ZeroTier, GRE, L2TP, PPTP and DMVPN.
- Rugged build: IP30 metal housing, -40 to +70 C, 9 to 48 V DC input.
What is the UR35 used for?
Smart metering and utility backhaul
The UR35 acts as a DLMS client and speaks Modbus and MQTT, so it backhauls smart meter and grid data over cellular. Use it for substation monitoring, smart metering, and remote grid telemetry where a fixed line is not practical.
SCADA and industrial telemetry
The RS485 port and Modbus RTU to TCP gateway connect PLCs, RTUs, and sensors to a central SCADA platform. The isolated digital input and output handle door contacts, alarms, and relay control at the same site.
Unattended retail and payment
Dual SIM failover keeps card terminals and kiosks online when one network drops. A VPN tunnel back to head office keeps payment traffic private over the public cellular network.
Transport and roadside cabinets
The -40 to +70 C range, DIN rail mount, and wide DC input suit roadside and trackside enclosures. On-site engineers connect over Wi-Fi in client or access point mode for local diagnostics without opening the cabinet.
Backup WAN for fixed-line sites
Run a wired WAN as primary and let the UR35 fail over to cellular when the line drops. VRRP and link failover keep a branch or ATM online during an outage.
Pro tip
The UR35-L04EU-W ships with Wi-Fi but no PoE. If you need to power 802.3af/at cameras from the LAN ports, or need on-board GPS, order the UR35-L04EU-G-P-W build instead. When wiring RS485, follow the Milesight convention: RXD to A, TXD to B. Reversing A and B is the most common cause of a silent Modbus link on first power-up, so check it before you suspect the config.
Building a resilient cellular connection
The UR35 carries two SIMs and switches automatically when a carrier drops. For higher resilience, fit SIMs from two networks and add Ethernet or Wi-Fi as a failover WAN path. The wide 9 to 48 V DC input lets you run the router from a small DC UPS, so a mains blip does not drop the link. Milesight DeviceHub gives you remote status, alerts, and firmware control across a fleet from one dashboard.
Frequently asked questions
Does the UR35-L04EU-W have PoE?
No. This variant has no PoE PSE hardware, and PoE cannot be added by firmware. If you need to power cameras or access points from the LAN ports, order the UR35-L04EU-G-P-W build, which fits four 802.3af/at PoE PSE ports.
Does this router have GPS?
No. The -W variant has no GNSS module. On the UR35, GPS is a factory hardware option ordered as the -G build. If you need positioning, specify the UR35-L04EU-G-P-W at order time.
Can I run a VPN on the UR35?
Yes. The UR35 supports OpenVPN, IPsec, WireGuard, ZeroTier, GRE, L2TP, PPTP and DMVPN. See our guide to VPN on cellular routers for how to pick a tunnel type for remote access.
What SIM card do I need for the UR35?
The UR35 takes two Mini SIM (2FF) cards for dual SIM failover. For remote management and inbound VPN, a fixed IP SIM is best because standard SIMs sit behind carrier NAT. See our fixed IP SIM cards and IoT SIM cards.
What is the operating temperature of the UR35?
The UR35 runs from -40 to +70 C. Cellular performance reduces above 60 C. Storage range is -40 to +85 C.
Does the UR35 support Modbus?
Yes. It works as a Modbus master or server and as a Modbus gateway, converting Modbus RTU on the serial port to Modbus TCP over the network. It also supports MQTT and DLMS.
Related products and further reading
Browse the full range of Milesight industrial routers. Pair the UR35 with an external 4G antenna for cabinet installs, and choose the right IoT SIM card or fixed IP SIM for your deployment. For secure remote access, read our guide to VPN on cellular routers.
| Cellular | |
|---|---|
| Cellular standard | 4G LTE Cat 4, 3G WCDMA, 2G GSM |
| Max download | 150 Mbps |
| Max upload | 50 Mbps |
| LTE FDD bands (EU) | B1, B3, B5, B7, B8, B20 |
| LTE TDD bands (EU) | B38, B40 |
| 3G / 2G bands | Region dependent, see datasheet |
| LTE transmit power | Class 3 (23 dBm +/- 2 dB) |
| SIM slots | 2 x Mini SIM (2FF), 1.8 V / 3 V |
| Cellular antenna ports | 2 x SMA female |
| Wi-Fi | |
| Standard | 802.11 b/g/n, 2.4 GHz |
| Modes | Access point or client |
| Security | WEP, WPA-PSK, WPA2-PSK, WPA-EAP, WPA2-EAP; TKIP / AES |
| Max Wi-Fi clients | 15 |
| Wi-Fi antenna port | 1 x RP-SMA female |
| Ethernet | |
| Ports | 5 x RJ45 10/100 Mbps (1 WAN + 4 LAN) |
| Duplex | Full or half, auto-sensing |
| Isolation | 1.5 kV RMS |
| PoE | Not fitted on this variant. PoE PSE is a factory option on -P builds |
| Serial and I/O | |
| Serial ports | 1 x RS232 + 1 x RS485, 3.5 mm terminal block |
| Baud rate | 300 to 230400 bps |
| Digital input | 1 x isolated, dry contact |
| Digital output | 1 x isolated, wet contact, max 0.3 A at 30 V DC |
| GNSS | |
| GNSS | Not fitted on this variant. GPS is a factory option on -G builds |
| Processor and memory | |
| CPU | NXP ARM Cortex-A7, 528 MHz |
| RAM | 128 MB DDR3 |
| Flash | 128 MB |
| Storage | 1 x microSD slot |
| Power | |
| Connector | 1 x 2-pin 5.08 mm terminal block |
| Input voltage | 9 to 48 V DC |
| Protection | Surge and reverse polarity |
| Consumption | Typical 3.9 W, max 4.6 W |
| Physical | |
| Housing | Metal, black |
| Ingress protection | IP30 |
| Dimensions | 135 x 103 x 45 mm |
| Weight | 485 g |
| Mounting | Desktop, wall, DIN rail |
| Environmental | |
| Operating temperature | -40 to +70 C (reduced cellular performance above 60 C) |
| Storage temperature | -40 to +85 C |
| Humidity | 0 to 95% non-condensing at 25 C |
| Software | |
| Networking | IPv4/IPv6, static routing, RIP, OSPF, VRRP, DDNS, QoS, VLAN, IP passthrough |
| Reliability | WAN failover, dual SIM backup, VRRP |
| Serial modes | Transparent (TCP/UDP/MQTT), Modbus master/server, Modbus RTU to TCP gateway, DLMS client |
| VPN | OpenVPN, IPsec, GRE, L2TP, PPTP, DMVPN, WireGuard, ZeroTier |
| Security | ACL, DMZ, port mapping, SPI firewall, DoS/DDoS protection, IP/domain filtering, AAA (Radius, TACACS+, LDAP), 802.1x |
| Management | Web, CLI (SSH/Telnet), SMS, SNMP v1/v2c/v3, TR069, DeviceHub, Milesight Development Platform, HTTP(s) API |
| On-device app | Python SDK |
| Certifications | |
| Regulatory | CE, FCC, RCM, JATE, Telec |
| Safety | EN 62368-1 |
| EMC | EN 55032, EN 55035 |
| Environmental | RoHS |
| In the box | |
| Contents | 1 x UR35 router, 1 x power adapter, 2 x cellular antennas, 1 x Wi-Fi antenna, 1 x pluggable terminal block, 1 x DIN rail clip kit |
| Warranty and support | |
| Warranty | 3-year manufacturer warranty |
| Support | UK-based technical support |
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