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The modules of the M series were specially developed for industrial automation processes, which can be used to easily and cost-effectively expand the inputs and outputs. Their 1M wide design ensures compact placement. Thanks to its built-in LEDs, they continuously provide feedback on the operating conditions.


The built-in mini USB enables quick configuration of individual modules without the use of an additional power supply. This configuration and device addressing can be done using the free SfAR Configurator.


The modules are capable of communicating on one of the most popular communication protocols, MODBUS ASCII/RTU.

Since the modules support the MODBUS protocol, they can be easily used in both new and existing installations.

Main features:

  • 7 different types

  • 1M wide design, can be mounted on a DIN rail

  • Up to 128 devices on one bus

  • Galvanic isolation of inputs and outputs; between power supply and RS485

  • 12 - 36 V ± 20% DC power supply support

  • Built-in mini-USB type B port for configuration

  • Each digital input can also be used as a high-speed counter (up to 1 kHz)

  • Support for the most commonly used temperature sensors: PT100, PT500, PT1000, NI100, KTY81-110 (2- and 3-wire)

  • Digital outputs switch DC voltage (transistor output), only PNP design max. 500 mA, 30 V DC

  • Built-in diode against inductive loads

  • Triac output: 0.5 A @ 24V AC; 0.5A @ 230V AC, protected against feedback

  • Analog outputs with voltage or current output

  • LED feedback on the status of inputs and outputs

  • MODBUS communication support

  • Built-in Modbus TCP/IP/ RS485 gateway (only for the IP version)

  • 1x Fast Ethernet port (only for the IP version)

  • Simple and fast addressing

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Temperature inputs (TI)
Each input is capable of 0.1°C resolution by supporting the following types of sensors:

  • Temperature input supports the following types of sensor elements: PT100, PT500, PT1000, NI100, KTY81-110 (2 and 3 wire) and a wide range of thermocouples: J, K, T, N, S, R, B 

  • Resistance input: 0-8000 Ω, resolution 1 Ω

  • Voltage input: 0-256 mV, resolution 10 μV

  • Voltage input: 0-2048 mV, resolution 100 μV

  • ADC processing time: 150 ms/channel

Digital inputs (DI)

  • Transistor input, galvanic isolation

  • Can operate in PNP or NPN mode (16DI can handle both modes at the same time)

  • All DIs have a 32-bit fast pulse counter with a frequency of up to 1kHZ

  • The first 4 channels allow the connection of 2 encoders (1-2 and 3-4 per pair)

  • FRAM memory for fast pulse counting

Analog outputs (AO)
All outputs with 12-bit ADC, 16ms/channel processing speed and accuracy less than ±0.5%.

The following output modes are supported:

  • Output 0-10 V DC resolution 1.5 mV

  • Current output: 0-20 mA, resolution 5 μA

  • Current output: 4-20 mA, resolution 16 μA

Digital outputs (DO)

  • Transistor output switching DC voltage only in PNP design.

  • Galvanic isolation and built-in diode against inductive loads

  • Max. 250mA @ 55V DC


  • ARM Cortex-M3


  • RS485 interface half duplex

  • Up to 128 devices on the bus

  • Protocol: Modbus

  • Baud rate: from 2400 to 115200 bps

  • Built-in mini-USB type B for configuration

Supply voltage

  • 10 - 36 V DC ± 20%

Device housing

  • Dimensions (WxDxD): 17x90x56 mm

  • Material plastic, self-extinguishing (PC/ABS)

  • Can be mounted on a DIN rail (according to the DIN EN 50022 standard)

  • Cooling: internal air circulation

Environmental parameters

  • Operating temperature: -10°C to 50°C

  • Storage temperature: -40°C to 85°C

  • Relative humidity: from 5% to 95%, non-condensing

  • IP protection: IP40 - for indoor use

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