Ultra Compact RS485 Modbus RTU Serial Port Relay Module With Six Operational Modes 12V One Channel PLC Controller For DIY Automation And Smart Projects Ideal For Industrial Control Panels And Home Automation Or Custom Embedded Needs

Ultra-Compact RS485 Modbus Relay Module for DIY PLC
✔️ Six modes, 12V, AT & MODBUS control, pack 1, up to 32 devices

The Ultra-Compact RS485 Modbus Relay Module is a single-channel relay controller designed for automation projects. It’s ideal for industrial control panels, home automation, and embedded systems where remote switching and serial communications matter.

✅ Six working modes: open, close, micro-motion, self-locking, interlocking, delay
✅ Command input: AT commands via serial terminal and MODBUS commands via serial or MODBUS polling
✅ Two command control modes: AT and MODBUS; MODBUS supports up to 32 devices in parallel
✅ Delay handling: AT mode up to 9 seconds; MODBUS mode up to 255 seconds
✅ 12V single-channel relay controller for compact automation setups

💡 What is a Modbus RTU relay module used for in automation projects? A handy device lets you switch circuits and monitor status over a Modbus network. - Handy for industrial control panels and home automation - Works with AT command mode or MODBUS command mode - Scales from single device to multiple devices in a single Modbus bus