1CH 4–20 mA Analog Signal Input Modbus RTU Board, 12V/24V Power Supply, Isolated RS-485

This board module reads 4–20 mA analog current signals via Modbus RTU. It can be easily accessed from PLCs, industrial PCs, and other host devices.

Features

Supports Modbus RTU and can be added to an existing RS-485 bus.
Simple register map makes configuration and programming easy.
Power, communication, and measurement sections are isolated, providing strong noise immunity and suitability for various industrial environments.
Free td-modbus commands are provided for operation checks and initial configuration.
Can be mounted on a DIN rail using the optional mounting kit TDAC-DMK.
Designed in Japan. Mass production, customization, and technical support are available.

Item	Value	Notes
Measurement range	0–24 mA
Resolution	12-bit
Absolute maximum rating	50 mA / 60 V	Protected by PTC
Input impedance	50 Ω
Number of channels	1
Update rate	100 Hz	10 ms measurement cycle
Filter	Available	Moving average sample count can be configured via Modbus RTU
Calibration	Supported	Via Modbus RTU procedure
Isolation rating	1 kV	Power section, measurement section, communication section
Supported wire	0.2–1.5 mm², 26–16 AWG	M2 screw terminal, Phoenix Contact 1984015
Communication standard	Modbus RTU, RS-485 half-duplex
Modbus termination resistor	Not equipped
Factory default communication settings	Slave Address `1`, `9600 8E1`
Power jack	5.5 mm outer diameter, 2.1 mm inner diameter, center positive, or terminal block
Power supply	12–24 V DC
Current consumption	30 mA typ., 150 mA max.
Operating temperature range	0–55°C
Board dimensions	W: 80, D: 60, H: 18	mm, excluding protrusions

Modbus analog board, Modbus 4–20 mA, 0–20 mA analog signal measurement, 4–20 mA analog signal measurement

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