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Module Features

Purpose and Description of the Module

The SfAR-1M-1AI1DO module allows voltage or current measurement and has one digital output. Values are read via the RS485 (Modbus), so it can be easily integrated with popular PLCs, HMI, or PC equipped with the appropriate adapter.

The device has 1 analog input for voltage measurement and 1 analog input for current measurement (both inputs can be used at the same time). In addition, the module is equipped with 1 configurable digital output (PNP or NPN type).

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, all outputs on and high state on all inputs)

1 W at 24 V DC

2 VA at 24 V AC

Isolation

Isolation between power supply and I/O

1000 V DC

Inputs

















No. of inputs

2

Absolute maximum input voltage

±60 V

Voltage input impedance

100 k Ω

Voltage measurement accuracy

±0.2%

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

Max. voltage

±16.386 V


Resolution

1 mV

Voltage input mode
0-1 V
-1-1 V

Max. voltage

±2.048 V

Resolution

1 mV

Absolute maximum input current

±35 mV

Current input impedance

100 Ω

Current measurement accuracy

± 0.1%

Current input mode
0-20 mV
-20-20 mV

Max. current

± 20.048 mV

Resolution

1 µA

Current input mode
4-20 mV

Max. current

20.048 mV

Resolution

1‰

Measurement resolution

16 bits

ADC processing time

70 ms/channel

Digital Outputs

Maximum current and voltage

250 mA/50 V

Temperature


Work

-20 °C to +65°C

Storage

-40 °C to +85°C

Connectors

Power supply

2 pin

Communication

3 pin

Inputs & Outputs

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.

Dimensions



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