M5Stack isolated RS485 unit (U094) – Modbus with galvanic isolation

The isolated RS485 unit connects an M5Stack controller to an RS485/Modbus bus with galvanic isolation. The isolation protects the controller from ground currents and interference, which is useful when the bus is long or the equipment has its own power supply, such as energy meters, heat pumps and ventilation units.

Good to know

Only connect to the low-voltage part (the RS485 terminal) of your equipment, never to 230 V. If you have an Atom and a short cable, the ATOM Tail485 (T002) is often enough.

Works with

• ESPHome (components uart and modbus_controller)
• Home Assistant via ESPHome
• All M5Stack controllers with a Grove port

You also need

A controller, for example the AtomS3 Lite. Grove cable included.

Manufacturer and documentation

Manufacturer: M5Stack Technology Co., Ltd, Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen, China, [email protected]. EU representative: Success Courier SL, Calle Rio Tormes 1, Planta 1, Derecha, Oficina 3, 28947 Fuenlabrada, Madrid, Spain, [email protected].

• Product documentation (M5Stack)
• Manufacturer certifications (CE/RoHS)

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