Purpose and Description of the Module

The SfAR-1M-2DI2DO module is an innovative device that provides a simple and cost-effective extension of the number of lines of input in popular PLCs.

The module has 2 digital inputs with configurable timer/counter option, which allows to connect one encoders. All inputs are isolated from the logic with optocouplers. Each channel can be individually configured in one of several modes.

The module is connected to the RS485 bus with a twisted-pair wire. Communication is via Modbus RTU or Modbus ASCII. The use of 32-bit ARM core processor provides fast processing and quick communication. The baud rate is configurable from 2400 to 115200.

The module is designed for mounting on a DIN rail in accordance with DIN EN 5002.

The module is equipped with a set of LEDs to indicate the status of inputs and outputs which is useful for diagnostic purposes and helping to find errors.

Module configuration is done via USB by using a dedicated computer program. It also allows for changing the parameters using the Modbus protocol.

Technical Specification

Power Supply



Voltage

10-38 V DC; 10-28 V AC

Power consumption (with active Modbus transmission and high state on all inputs)


1 W at 24 V DC

2 VA at 24 V AC

Digital Inputs







No. of inputs

2

Voltage range

0-36 V

Low state "0"

0-3 V

High state "1"

6-36 V

Input impedance

4 kΩ

Isolation

1500 Vrms

Input type

PNP or NPN

Counters




No.

2

Resolution

32-bit

Frequency

1 kHz (max.)

Impulse width

500 μs (min.)

Digital Outputs





No. of outputs

2

Max. voltage

55 V

Max. current

250 mA

Output type

PNP

Isolation

1500 Vrms

Temperature


Work

-20°C to +65°C

Storage

-40°C to +85°C

Connectors




Power supply

3 pin

Communication

3 pin

Inputs

2 x 3 pin

Configuration

mini USB

Size



Height

90 mm

Length

56.4 mm

Width

17.5 mm

Interface

RS485

Up to 128 devices

Technical specification

Dimensions


The appearance and dimensions of the module are shown below. The module is mounted directly to the rail in the DIN industry standard. Power connectors, communication and IOs are at the bottom and top of the module. USB connector configuration and indicators located on the front of the module.

Dimensions