SfAR-1M-1AI1DO User Manual
www.ismacontrolli.com
DMP264en | 3rd Issue rev. 1 | 05/2022
page 5 of 19
3 Module Features
3.1 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.
3.2 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
