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About the product

SFAR-1M-2DI2DO has 2x DI (Digital Inputs) and 2x DO (Digital Outputs). Digital Inputs can work as fast pulse counter up to 1 kHz, support PNP or NPN input types. Digital Outputs are PNP transistor outputs with maximum load 250 mA, 55 V DC. All inputs and outputs are separated from power supply and RS485 block with use of optical isolators.
Built-in RS485 interface allows to easy connection over Modbus RTU/ASCII protocol with a PLC makes the modules an external I/O. The use of 32-bit ARM core processor provides fast processing and communication with the baud rate from 2400 to 115200 bps. The module is equipped with a set of LEDs used to indicate the status of inputs, outputs, power supply and RS485 communication. This feature is useful for diagnostic purposes and helping to find errors.
Built-in mini USB allows for initial configuration of the unit without power supply.

Key Features

• 2x opto-isolated Digital Input
• 2x opto-isolated Digital Output
• Every DI works as 32-bit impulse counter or time counter
• Support for encoder
• 55 V @ 250 mA per output
• Built-in LEDs for device status indication
• Modbus RTU/ASCII communication
• Baud rate: 2400 bps to 115200 bps
• Up to 128 modules on the bus
• Built-in mini USB type B port for configuration
• Space-saving housing, DIN rail mount

Digital Inputs (DI)
• Input type: PNP or NPN
• Fast pulse counter up to 1 kHz
• Time counting in ms for active input
• DI1-DI1- 1x encoder support
Digital Outputs (DO)
• Transistor output (PNP) max. 250 mA, 55 V DC Platform
• ARM Cortex-M3 Communication
• Interface RS485 half-duplex
• Up to 128 devices on the bus
• Protocol: Modbus RTU/ASCII
• Baud rate: 2400 to 115200 bps
• Interface mini USB type B

Power supply
• 12-24 V DC ± 20%


• Dimension WxHxD: 17x90x56 mm
• Construction: UL approved,self-extinguishing plastic (PC/ABS)
• DIN rail mounting DIN (DIN EN 50022 norm)
• Cooling: internal air circulation


• Operating temperature: -10°C to 50°C
• Storage temperature: -40°C to 85°C
• Relative humidity: 5% to 95%, no condensation
• Ingress Protection Rating: IP40 – for indoor installation

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