Industrial RS485 to Ethernet Converter for Modbus networks. Drop it on a DIN rail and your legacy serial devices show up on the network in minutes — no protocol gymnastics required.
Excl. GST · Industrial pricing · Free shipping above ₹10,000
“The right team, knows their work.”
Hariharan
Managing Director, Bator Technologies
How it works
No protocol gymnastics, no firmware quirks. Plug your RS485 multidrop bus into one side, run an Ethernet cable to your SCADA or cloud gateway on the other. Bidirectional, lossless, configurable.
Mechanically, the converter acts as a Modbus RTU master on the RS485 side: it polls each connected device by address, then re-frames the same register data as Modbus TCP requests on the Ethernet side. As an RS485 ethernet converter, it needs no change to the field devices themselves — the RTU slaves keep running exactly as wired, the gateway just gives them a TCP/IP address to be reached at.
PLC / Meter
Modbus RTU
RS485
MDIM-485
Bridge
Ethernet
SCADA / Cloud
Modbus TCP
Built for the factory floor
Metal housing, -40 to 75 °C operating range, surge and ESD protection on the RS485 line, dual 6–24 VDC power input. Designed for the kind of cabinet that doesn't come with air-conditioning brochures.
Wide thermal range
-40 °C to 75 °C operating
Line protection
Surge + ESD on RS485
Dual power input
6–24 VDC terminal or jack
Metal housing
160 g, 82 × 51.5 × 23 mm
Field-friendly wiring
Mating screw-terminal connector, multidrop RS485 bus support, and dedicated power / link / TX / RX indicators so commissioning takes minutes, not hours.
MDIM Manager
Free desktop tool to set IP address, baud rate, parity, slave mappings, and firmware updates. No cloud login, no subscription — just connect over Ethernet and go.
Why this over a generic converter
Bare RS485-to-Ethernet modules imported from overseas can look cheaper on paper. The real cost shows up later — a 12-month warranty instead of 2, a cross-border RMA when a unit fails, and a support ticket that has to cross a time zone. The MDIM-485 is priced to be the cheaper option once you account for what you actually get: an India-stocked, DIN-rail, metal-housing industrial converter with local warranty and support — not the absolute lowest price of a bare import module before duties and shipping are added.
| MDIM-485 | Typical imported converter | |
|---|---|---|
| Assembled | Coimbatore, India | Overseas (China, Taiwan, etc.) |
| Warranty | 2 years | Commonly 12 months |
| Replacement / RMA | Handled locally, no overseas shipping | Cross-border return, weeks of transit |
| Technical support | Direct WhatsApp + phone, India hours | Support ticket queue, overseas hours |
Where it fits
Most legacy PLCs, VFDs, and panel meters only speak Modbus RTU over a serial RS485 port — but SCADA, MES, and historian software expect Modbus TCP on the plant network. The MDIM-485 sits on the RS485 multidrop bus, polls discrete I/O, analog setpoints, and alarm registers, and re-publishes them over Ethernet, so a 15-year-old PLC shows up on the network without a controller swap.
HVAC controllers, energy meters, and access-control panels installed years ago often only have an RS485 terminal. Retrofitting them into a modern BMS or energy-monitoring dashboard usually means running new conduit — or bridging the existing RS485 wiring to Ethernet at the panel and leaving the field wiring untouched.
Solar inverters, battery management systems, and power-distribution meters typically expose their readings over Modbus RTU for a local display. Bridging that to Ethernet lets the same registers — voltage, current, state of charge, fault codes — reach a central monitoring dashboard without touching the inverter's own wiring or firmware.
Distributed sensors and edge controllers on a factory floor or remote site are usually wired to a local RS485 loop, not the internet. The MDIM-485 gives that loop an Ethernet uplink to a cloud gateway or historian, so trend data and predictive-maintenance alerts can be built on top without rewiring the sensor network itself.
Need it over WiFi instead of a wired Ethernet run? See the RS485 to WiFi Converter.
Specs
A few numbers below matter more than they look: the -40 to 75 °C range covers an unconditioned outdoor cabinet, not just an air-conditioned server room. The 50 bps – 921.6 kbps baud range means the same gateway works whether the RS485 bus was commissioned at a cautious 9600 bps or configured for a faster modern setup. Dual power input (screw terminal or barrel jack) exists so the same unit fits either a permanent panel install or a bench test rig without an adapter. Datasheet DS_MDIM485 v1.1, released Oct 7, 2025 — see Resources below for the full PDF.
Communication Interfaces
Electrical
Physical
Environmental
Resources
FAQ
New to the protocols? Read our RS485 guide or What is Modbus?
Get a quote with volume pricing, lead time, and integration support — usually in under 24 hours.
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