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MODBUS GATEWAY / RS485

A Modbus RTU gateway for distributed field points.

Start small with RS485/Modbus RTU, move data into MQTT or an internal system, and expand when points and workflows grow.

Discuss the field points See the data path
RS485 / MODBUS RTULOCAL-FIRSTHANDOVER-READY
01 / ARCHITECTURE

From one field point to a data path.

A gateway is a starting layer, not a closed system. Put its data into a path that can expand to edge runtime and APIs.

01Meter · Sensor · PLC
02RS485 / Modbus RTU
03iNut RS485 Gateway
04MQTT · P2P · Local API
05SCADA · App · CRM
02 / WHERE IT FITS

Choose a gateway when the signal is clear.

If the job starts with a few remote Modbus RTU points, a gateway is the leanest layer to test the data path.

01

Few points, fast start

Begin with 1–4 data points and a known protocol.

02

Existing field network

Use RS485, WiFi, Mesh, or the connectivity that fits the site.

03

A path to expand

Move to Datalogger/Edge when storage, logic, or more protocols are required.

03 / NEXT LAYER
iNut reference

iNut RS485 Gateway

See the gateway role, connectivity, and starting path.

View the gateway
iNut reference

Product comparison

Put gateway, Datalogger, and Local API layers side by side.

Compare layers
iNut reference

Safe simulator

Try the synthetic field → edge → API flow in the browser.

Run simulator
04 / START FROM THE CURRENT STATE

Have a Modbus point list?

Share device models, slave IDs, baud rate, and the receiving system. iNut will map the gateway and the first test.

Discuss the field points
FAQ / CLARITY BEFORE CONTACT

Questions teams ask before an architecture review.

Who is a Modbus gateway for?

Teams that need to read distributed RS485/Modbus RTU points and move data into MQTT, P2P, or an internal system.

When should we choose a Datalogger instead?

When the site needs multiple protocols, storage, buffering, alerts, or a shared data hub.