Modbus I/O module with 1 temperature input and 1 digital output.

Modbus I/O Module
SfAR-1M-1TI1DO is designed for controlling ON/OFF heaters following temperature measurement.

1 Temperature Input & 1 Digital Output
The module has 1 temperature input (TI) and 1 digital output (DO). A temperature input can work with the most popular resistance temperature sensors and a wide range of thermocouples. A digital output is a NPN transistor output. All inputs and outputs are isolated from the logic with optoisolators.

Simplified Configuration and Commissioning Process
A built-in RS485 interface allows an easy connection over the Modbus RTU/ASCII protocol. A 32-bit ARM core processor provides fast processing and communication.
The module is equipped with a set of LEDs used to indicate the status of I/Os, power supply, and RS485 communication.
Configuration of the module is carried out with our free software, the SfAR Configurator. A built-in mini USB allows for performing a primary configuration of the unit without an additional power supply.


Technical Specification


Hardware Specification
RS485 interface
mini USB type B interface
Status LED indicators
DIN rail mounted

1 Temperature Input (TI)
PT100, PT500, PT1000, NI100, KTY81-110 (2- and 3-wire)
Thermocouples J, K, T, N, S, R, B
Resistive inputs 0-8000 Ω
Voltage inputs 0-256 mV, 0-2048 mV

1 Digital Output (DO)
50 V DC, 250 mA
Opto-isolated from RS485 and power supply

Free software – SfAR Configurator

Power Supply
10-38 V DC ± 20%
10-28 V AC ± 20%

Outputs typeDigital
Inputs typeUniversal
Communication protocolModbus RTU/ASCII
Power supply10 to 28 V AC, 10 to 38 V DC
Digital outputs1


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