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Module Features


Purpose and Description of the Module

The SfAR-S-8AI2DO module allows for measuring voltages and currents. Values are read via RS485 (Modbus), so the module can be easily integrated with popular PLCs, HMI, or PC equipped with the appropriate adapter.
The device has a set of 8 analog inputs measurements. In addition, the module is equipped with 2 configurable digital outputs.

This 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 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, all outputs on and high state on all inputs)

2.4 W at 24 V DC

3 VA at 24 V AC

Inputs

















No. of inputs

8

Absolute maximum input voltage

±30 V

Voltage input impedance

120 kΩ

Voltage measurement accuracy

±0.2 %

Voltage input mode
0-10 V
-10-10 V

Max. voltage

±12.288 V

Resolution

1.5 mV

Voltage input mode
0.1 V
-1.1 V

Max. voltage

±3.072 V

Resolution

1 mV

Absolute maximum input current

±35 mA

Current input impedance

100 Ω

Current measurement accuracy

±0.2 %

Current input mode
0-20 mA
-20-20 mA

Max. current

±30.72 mA

Resolution

3.75 μA

Current input mode
4-20 mA

Max. current

20 mA

Resolution

1 ‰

ADC processing time

16 ms/channel

Isolation

1000 V DC

Digital Outputs


Maximum current and voltage

500 mA/55 V

Isolation

1000 V DC

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 pin

Communication

3 pin

Inputs & outputs

2 x 10 pin

Quick connector

IDC10

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 I/Os 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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