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Green PCB with four relay blocks and terminal strips

Ruth's sister

Ruth's sister Modbus RTU 4 Channel 12V Relay Module

SKU CH-J04D-XY149

Four-channel 12 V relay board with RS-485 and TTL interfaces for Modbus RTU control

  • Modbus RTU control for industrial automation
  • Four 12 V relay channels switch loads independently
  • RS485 and TTL interfaces connect to diverse hosts
  • On-board LED indicators show each relay state

Ruth's sister Modbus RTU Relay Module

This module provides four independently switched 12 V relay channels controllable over RS485 or TTL serial links using the Modbus RTU protocol. Each channel has a status indicator for quick visual confirmation of the switching state. The board suits automation projects that need reliable remote switching of low-voltage loads.

Ideal for integrators building Modbus networks

Engineers who need more than four channels or a different coil voltage should look at other modules. Projects requiring Ethernet, Wi-Fi or CAN interfaces will not be served by this board. Buyers without a Modbus master or serial gateway cannot operate the relays.

Highlights

  • Modbus RTU control for industrial automation
  • Four 12 V relay channels switch loads independently
  • RS485 and TTL interfaces connect to diverse hosts
  • On-board LED indicators show each relay state

Specifications

No published specifications for this item yet.

Questions about this item

Does the RS485 interface support standard Modbus RTU addressing?

Yes, the module communicates over RS485 using the Modbus RTU protocol for reliable industrial control.

What voltage supply does the board require for the relays?

The module operates from a 12 V supply to drive its four relay channels.

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