Milesight UR32 Pro Series 4G Router with Serial (RS232/RS485), WiFi, 2 x Ethernet, DIO (UR32-L0GEU-W-485)

4G Router with Wi-Fi and RS485 Serial – No PoE (UR32-L0GEU-W-485)

The Milesight UR32-L0GEU-W-485 is a compact industrial 4G LTE Cat 4 router combining dual SIM cellular failover, 2.4 GHz Wi-Fi, and a software-selectable RS232/RS485 serial port for direct Modbus instrument integration. It runs from 9 to 48 V DC in a metal IP30 enclosure rated from -40 to +70°C, mounting on a DIN rail or wall. This variant does not include PoE PSE output. It is the right choice for deployments where PoE is unnecessary or where a separate switch or injector already handles device power.

The RS485 port bridges directly to Modbus instruments – energy meters, PLCs, environmental sensors, and inverters – and forwards register data over 4G to a SCADA platform, IoT cloud service, or BMS without a separate protocol converter. Dual SIM keeps the connection live if one carrier fails. The Python SDK enables custom edge logic on the router itself, reducing cloud dependency for threshold alerting and data pre-processing. For deployments that require PoE output directly from the router, see the UR32-L0GEU-P-W-485. Explore the full Milesight 4G router range for alternative configurations.

Key Features

• 4G LTE Cat 4 – 150 Mbps down / 50 Mbps up, with automatic 3G/2G fallback
• Dual Mini SIM (2FF) with automatic failover between carrier networks
• 2x RJ45 10/100 Mbps Ethernet – 1x WAN + 1x LAN, configurable as 2x LAN
• 802.11b/g/n Wi-Fi 2.4 GHz – AP and client modes, up to 15 simultaneous connections
• RS485 serial port – Modbus RTU/TCP gateway, transparent TCP, UDP, MQTT, and DLMS modes
• 1x digital input + 1x digital output, galvanic isolation, configurable via SMS, MQTT, and Modbus
• MicroSD slot for local data storage and logging
• VPN – OpenVPN, IPsec, WireGuard, ZeroTier, GRE, L2TP, PPTP, DMVPN (spoke)
• Python SDK for edge application and custom automation development
• Operating temperature -40 to +70°C, IP30, DIN rail and wall mount

What the UR32-L0GEU-W-485 is Used For

Industrial RS485 Equipment and Modbus Integration

The RS485 port with built-in Modbus RTU-to-TCP gateway makes the UR32 a direct interface for meters, PLCs, inverters, and environmental sensors on a serial bus. Engineers can read Modbus RTU registers and forward data over 4G to a SCADA system, cloud historian, or building management platform. Supported output modes include MQTT, TCP client/server, UDP, HTTP, and DLMS. This covers energy sub-metering, power quality monitoring, building management, and agricultural telemetry.

Utility Telemetry and Remote Substations

Water pumping stations, electrical switchgear enclosures, and remote telemetry units typically combine serial instruments with a requirement for secure remote access and alarm notification. IPsec or WireGuard VPN on cellular routers provides a secure tunnel back to the operations centre. The digital input monitors door contacts, float switches, or pressure alarms and triggers SMS or MQTT alerts on state changes. Dual SIM ensures the connection survives a single operator outage.

Construction Site and Temporary Welfare Networks

On sites with temporary cabins or welfare units, the UR32 provides cellular WAN and distributes it over Wi-Fi to laptops, tablets, and IP phones. Dual SIM allows two carrier SIMs to be installed, keeping connectivity if one network degrades. The DIN rail form factor fits inside a standard temporary distribution board. When the site moves on, the router moves with it.

Retail, Kiosk, and Payment Terminal Connectivity

Payment kiosks, self-service terminals, and vending machines require an always-on cellular connection with a fixed IP for inbound VPN access and remote management. The UR32’s dual SIM failover, combined with a fixed IP SIM and WireGuard or OpenVPN tunnel, provides the stable, addressable connection these deployments need. RS485 covers serial peripherals such as receipt printers, coin validators, and older POS card readers that remain common in the field.

SCADA Telemetry with Existing PoE Infrastructure

For sites where IP cameras, access control readers, or other powered Ethernet devices are already supplied by a managed PoE switch, the UR32-L0GEU-W-485 provides the cellular uplink and RS485 serial integration without the cost of built-in PoE PSE. The router feeds cellular WAN to the existing LAN and handles Modbus data forwarding in parallel. This is the correct choice where PoE infrastructure is already in place and duplicating that capability in the router serves no purpose.

Frequently Asked Questions

What is the difference between the UR32-L0GEU-W-485 and the UR32-L0GEU-P-W-485?

The only hardware difference is PoE PSE output. The UR32-L0GEU-P-W-485 includes 802.3af/at PoE PSE on both LAN ports, capable of powering IP cameras or access control readers directly from the router (up to 30 W per port). The UR32-L0GEU-W-485 does not include PoE PSE. All other specifications – cellular, Wi-Fi, RS485, dual SIM, DI/DO, VPN, Python SDK, and operating range – are identical. Choose the W-485 when PoE output from the router is not required; it avoids paying for capability the installation does not need.

What SIM card do I need for the UR32?

The UR32 takes a Mini SIM (2FF format) in both SIM slots. For SCADA, VPN tunnelling, and remote access applications, a fixed IP SIM card is strongly recommended. Standard SIM cards sit behind carrier-grade NAT, which blocks inbound connections. A fixed IP SIM assigns a routable public address directly to the router, enabling inbound VPN connections, direct device access, and SCADA polling without NAT traversal workarounds. See IoT SIM cards for the full range including roaming and dynamic IP options.

Does the UR32 support Modbus over the RS485 port?

Yes. The RS485 port supports Modbus RTU natively and includes a Modbus RTU-to-TCP gateway function. Register data from connected serial instruments is bridged over TCP to a SCADA system, cloud platform, or BMS without additional hardware. The serial port also supports transparent TCP client/server, UDP server, MQTT client, and DLMS client modes, covering industrial telemetry, metering, and power quality applications.

Can I manage multiple UR32 routers remotely?

Yes. Milesight DeviceHub provides centralised configuration, mass firmware updates, cellular diagnostics, and event alerting across fleets of deployed units. SNMP v1/v2c/v3, TR-069, and HTTP(S) API are available for integration with third-party NMS platforms. The Python SDK allows custom applications to run on the router itself, enabling edge logic without a cloud dependency.

What VPN protocols does the UR32 support?

The UR32 supports OpenVPN (client and server), IPsec (client and server), WireGuard, ZeroTier, GRE, L2TP, PPTP, and DMVPN spoke mode. For site-to-site connectivity and secure remote access over cellular, WireGuard and IPsec are the most common choices. See our VPN on cellular routers guide for a protocol comparison and configuration guidance.

Does this variant include GPS, and can I have both Wi-Fi and GPS?

No, this unit does not include GPS. On the UR32 platform, Wi-Fi and GPS are mutually exclusive hardware options – they occupy the same module position on the board and cannot be fitted simultaneously. The UR32-L0GEU-W-485 is the Wi-Fi variant; if you need GPS instead, the equivalent variant is the UR32-L0GEU-G-485 (GPS fitted, no Wi-Fi). There is no UR32 configuration that supports both Wi-Fi and GPS in the same enclosure. If your application requires both onboard GPS and Wi-Fi alongside 4G, you would need to step up to the UR35 or UR75. Call 0300 124 6181 and we will advise on the right model.

UR32 Variant Comparison

The UR32 range covers several hardware configurations. This page covers the UR32-L0GEU-W-485, the EU-band variant with Wi-Fi and RS485 serial but without PoE PSE output.

Need GPS with RS485, PoE output, or a different configuration? Call our UK-based technical team on 0300 124 6181.

Related Products and Further Reading

Browse the full Milesight 4G router range for alternative UR32 configurations. For the same model with built-in 802.3af/at PoE PSE, see the UR32-L0GEU-P-W-485. For cellular connectivity, a fixed IP SIM card is recommended for any deployment requiring inbound VPN access or direct remote polling. See IoT SIM cards for roaming and dynamic IP options. For guidance on VPN configuration over cellular connections, see VPN on cellular routers. UK-based technical support is available on 0300 124 6181.