Modbus I/O module with 16 relay outputs.

Modbus I/O Module
SfAR-S-16RO is designed to be applied wherever it is necessary to switch to a 3 A load of both AC and DC.

16 Digital Outputs
The module has 16 relay outputs (RO). Relay outputs are normally open (NO) type.

Simplified Configuration and Commissioning Process
A built-in RS485 interface allows an easy connection over Modbus RTU/ASCII protocol. A 32-bit ARM core processor provides fast processing and communication.
The module is equipped with a set of LEDs used to indicate the status of I/Os, power supply, and RS485 communication.
Configuration of the module is carried out with our free software, the SfAR Configurator. A built-in mini USB allows for performing a primary configuration of the unit without an additional power supply.
To simplify the installation, the module has been equipped with the Quick Connector system. Using a dedicated SfAR-S-LINK cable allows for connecting up to 10 modules, which provide both RS485 communication and external power supply.


Technical Specification


Hardware Specification
RS485 interface
mini USB type B interface
Status LED indicators
DIN rail mounted
Quick Connector system

16 Relay Outputs (RO)
NO type relay
230 V AC/30 V DC max. 3 A

Dedicated TCP/IP to Modbus RTU/ASCII gateway device, SfAR-S-ETH
Free software – SfAR Configurator

Power Supply
10-38 V DC ± 20%
10-28 V AC ± 20%

Outputs typeDigital
Communication protocolModbus RTU/ASCII
Power supply10 to 28 V AC, 10 to 38 V DC
Digital outputs16


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