RIO-28 Programmable I/O Module:
The RIO-28 Programmable I/O Module provides an easy way to read and control analog and digital signals. In many instances, it can completely eliminate the need for an RTU at remote points.
  • Transient & over-voltage protection on all I/O
  • Can operate as standalone or in a mirror mode
  • 32-bit counter on each input is saved, even through power outages
  • Made in the USA
In addition to standalone and mirror modes, the RIO-28 Programmable I/O Module can execute code that you create with our Integrated Development Environment (IDE). These programs can automate many tasks that might be done manually or with a PC or RTU.
User programs can also give your I/O module the ability to communicate with other devices. Connect the RIO to a cellular modem, for example, and have your program send an SMS to indicate an error condition!

Related Documents
View online RIO family documentation (online)
View online IDE documentation (online)
View online Warranty information (online)
View online Mirror program app. note (online)

Download the Integrated Development Environment (IDE) now and see what the programmability can add to your site! You can write programs in either a C-like language or with our easy-to-use flowchart editor.

The IDE even includes a simulator/debugger that lets you develop your applications before you even purchase a RIO-28!

Key Benefits

  • Low cost - replaces much more expensive hardware
  • Compatible with our advanced (XL) OEM radio modules
  • 9 - 14 V and 10 - 28 V options available
  • Wireless*, RS-232, or RS-485 interface
  • DIN rail or panel mounting
  • 7 analog inputs (12-bit A/D converts 0 - 20 mA)
  • Supply voltage monitoring
  • 4 analog output channels (12-bit D/A converts to 0 - 20 mA)
  • Analog Flex inputs can be used as digital inputs
  • Multiple analog conversion scales available
  • 8 open-collector (solid state form A) digital outputs
  • 8 optically isolated inputs
  • Configuration and outputs saved on power loss
  • 20 LED status indicators for easy debugging
  • Programmable baud rate and parity
  • External RS-232/485 port may be tied to other sensors and share the internal radio (if equiped)
  • Powerful Windows®-based configuration software (screen shot)
  • Powerful Windows®-based IDE software (screen shot)
* Radio module sold separately

Modbus Interface Features

  • 7 channels of 12-bit A/D read from input registers 1 through 7 (30001 - 30007)
  • Digitally calibrated
  • Supply voltage read from input register 8 (30008)
  • 8 channels of isolated digital inputs read as status inputs 1 through 8 (10001 - 10008)
  • 4 channels of analog output written as holding registers 161 through 164 (40161 - 40164)
  • 8 channels open-collector outputs written as coils 1 through 8 (00001 - 00008)
  • 8 input channels with pre-settable 32-bit pulse counters for AMR applications
  • Modbus address may be set electronically, without physical access to the unit
  • On-board LEDs indicate status, poll, response, I/O state, and error, simplifying problem diagnosis
  • RTU interface protocol

Mirroring Interface Features

  • All I/Os can be mirrored
  • User mapping of I/O across multiple units
  • User-configurable failsafe modes
  • Supports Modbus commands and executes user program, even in mirroring mode

Ordering Information

Model Description Single Piece
RIO-28 Programmable I/O Module RIO-28 Programmable I/O module with mirroring capability.
9 - 14 V operation (radio & antenna sold separately).
OPT-28 10 - 28 V operation option add $22
OPT-PROG User-programming key* add $99
* The programming key can be downloaded over the internet and does not require factory-installation.

Related Accessories

Prices are subject to change without notice.