Omron's SmartSlice I/O system (GRT1) is compact, intelligent and easy to use. By using built-in functions such as pre-scaling, totalising, differentiation and alarming in analog I/O units, PLC programming can be minimised. Preventive maintenance data can be accessed using CX-Integrator software, standard PLC function blocks or NS-series Smart Active Parts.

  • Most compact in the market (84 mm high)
  • Easy set-up, backup and restore functions
  • Diagnostics and preventive maintenance data at I/O level
  • Detachable terminal blocks allow hot-swapping without re-wiring
  • 3-wire connection with 'push-in' technology, no screwdriver required for installation

Modular intelligence

Smartslice is the most intelligent and easy-to-use remote I/O system currently available. It allows you to:

  • Minimize engineering time
  • Troubleshoot rapidly
  • Schedule maintenance to prevent breakdowns


Transparent communication

Open for communication by open standards

  • PROFINET IO: Built-in Ethernet switch and MRP ring redundancy.
  • PROFIBUS DP: FDT-DTM for easy access to all intelligence in SmartSlice.
  • DeviceNet: The industrial CAN protocol. Efficient and Robust.
  • CompoNet: Plug-and-work. No setup required.
  • MECHATROLINK-II: For integration in motion control systems.
  • EtherCAT: For Trajexia and Sysmac controllers.

Hot swap

No need to stop

Reliable 3-piece construction enabling you to swap modules during operation, without rewiring. All I/O unit data can be backed up in the bus interface unit at the flick of a switch. Recovery is even simpler; after hot-swapping a unit, all settings are automatically loaded.


No tools required

Easy push in wiring for quick installation. The SmartSlice terminal blocks provide fast and reliable screwless clamp connections.

Smart features

All Omron I/O units have built-in Smart Features that help to:

  • Reduce engineering time
  • Plan preventative maintainance
  • Increase your productivity

Take a look at one of the features below for a demonstration.


Smart I/O can store the last date on which you performed maintenance. A better overview will help you plan maintenance more efficiently.


Smart I/O units all keep track of duration and number of operations, to help you plan machine maintenance. Timely warnings to inspect and adjust the machine will minimise unplanned downtime.

Volt meter

Smart I/O monitors its own supply voltage, and will warn you if the voltage is out of safe range - e.g. due to damaged cable or poor connection.


Smart I/O can measure delays between two I/O signals with millisecond accuracy. When your preset limit is exceeded, Smart I/O will warn you that wear or lack of lubrication has reduced machine performance.


Smart Analog I/O performs data pre-processing to help you reduce PLC programming. Scaling and alarms, and even totalising or rate-of-change calculations are handled inside the unit.