MODIG MD20003 - 12 SSR Relay and 8 Input Modbus RTU Module via RS485 for DIN Rail

Description

The module is designed for remote control of electrical devices and monitoring of digital signals using the Modbus RTU protocol transmitted via the RS485 bus. The design features 12 independent SSR solid-state relays intended for switching AC loads and 8 opto-isolated digital inputs, enabling control, automation, telemetry and monitoring functions in industrial installations, building automation systems and supervisory applications. Control of all outputs, input monitoring and device configuration are performed using standard Modbus commands.

The RS485 interface is equipped with full galvanic isolation and surge protection, increasing resistance to interference commonly present in industrial environments. The device supports configurable transmission speeds from 1200 bps to 1 Mbps, parity settings and stop bit configuration, ensuring compatibility with various PLC controllers, HMI panels and SCADA systems.

The module is designed for DIN 35 mm rail mounting. It can be powered from a 5 V DC supply through a USB-C connector or a 2.1/5.5 mm DC jack, as well as from a 7-28 V DC industrial power supply through a Phoenix Contact MC 3.81 mm connector. Built-in supply voltage and internal temperature monitoring provide continuous diagnostics and operating condition supervision.

Features

• 12 SSR solid-state relays
• 8 opto-isolated digital inputs
• 12 independent output channels
• 8 independent input channels
• SSR output operating voltage: 100-240 V AC
• Output current: 0.1-2 A per channel
• Switching type: Zero-Cross
• Maximum total output current: 10 A
• Input activation voltage range: 5.5-25 V DC
• Input current consumption: approximately 2-12 mA
• Control via RS485 and Modbus RTU
• Full configuration through Modbus commands
• RS485 interface with galvanic isolation
• RS485 surge protection
• Transmission speed from 1200 bps to 1 Mbps
• Configurable parity: None, Even, Odd
• Configurable stop bits: 1, 1.5, 2
• Supply voltage measurement
• Module temperature measurement
• 5 V DC power supply via USB-C
• 5 V DC power supply via 2.1/5.5 mm DC jack
• 7-28 V DC power supply via Phoenix Contact MC 3.81 mm connector
• DIN 35 mm rail mounting
• Dimensions: 200 x 110 x 60 mm

Kit includes

• MODIG Modbus RTU 12 SSR / 8 IN module
• 5 V / 2 A power supply adapter