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Module Features


Purpose and description of the module

The SfAR-S-8DI8RO module is an innovative device that provides a simple and cost-effective extension of the number of lines of input and output in popular PLCs.

The module has 8 digital inputs with configurable timer/counter option and 8 relay outputs. In addition, terminals IN1 and IN2, and IN3 and IN4 can be used to connect two encoders. All inputs are isolated from the logic using 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, power supply, and communication, 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 or set the Modbus address using the DIP switches under the front panel.

Technical Specification

Power Supply



Voltage

10-38 V DC; 10-28 V AC

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


3 W at 24 V DC

4.8 VA at 24 V AC

Digital Inputs







No of inputs

8

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 lub NPN

Relay Outputs

No of outputs

8

The maximum current and voltage (resistive load)

3 A 230 V AC

3 A 30 V DC

Counters




No. of counters

8

Resolution

32-bit

Frequency

1 kHz (max)

Impulse Width

500 μs (min)

Temperature


Work

-10 °C to +50°C (14°F to 122°F)

Storage

-40 °C to +85°C (-40°F to 185°F)

Connectors





Power Supply

2 pins

Communication

3 pins

Inputs

10 pins

Outputs

10 pins

Configuration

Mini USB

Size



Height

119.1 mm (4.689 in)

Length

110.9 mm (4.366 in)

Width

22.7 mm (0.894 in)

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 are located on the front of the module.

Dimensions




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