Strict cost requirements and a huge variety of automation scenarios mean that it is not possible to develop a universal programmable logic controller (PLC). For this reason, the following challenges can also arise down the road even if a well-suited controller has been selected:

  • - Insufficient PLC resources, e.g. a low number of inputs and/or outputs
  • - Issues with compatibility with other devices in the network (interface, protocol, etc.)
  • - Large distances from the PLC to field devices.

To solve this and similar problems, remote I/O-Modules have been developed. These modules are used to set up decentralized systems, to control industrial objects and processes. The expansion modules can complement such systems, with multiple inputs or outputs, thus ensuring more functionality and flexibility of the systems. Among many decentralized systems, the single-master systems based on the RS485 serial interface and Modbus protocol have become the most established in industrial automation. That is why akYtec I/O modules have the appropriate interfaces and protocols.

In addition to the inputs and outputs, most modern I/O modules offer many different functions, such as cold junction compensation, linear signal scaling, wire break detection, safe mode, restoring factory settings. etc. The integration of more and more PLC functions in the I/O modules is one of the prevailing trends. This makes modules more independent and efficiently expands the control systems without significantly increasing the CPU utilization of the PLC. The akYtec Mx110 series extension modules are based on the same principle and offer a cost-effective and flexible solution for distributed automation systems.

The akYtec modules are delivered in a compact IP20 enclosure and can be operated in a temperature range of 20...50 °C. Thanks to the universal design, the enclosure can be mounted either on the DIN rail or on the wall. The plug-in terminal blocks make it possible to remove the device from the DIN rail or the wall without disconnecting the cables individually. The power supply circuits are protected against overvoltage due to galvanic isolation. Reverse polarity protection is also available.

The modules are configured using the special PC software (Mx110 configurator), which is available for free download from This configurator is universal and therefore suitable for every module of the Mx110 series. Each of these modules can be connected to the PC via a USB-RS485 converter from akytec or any other similar converters. If the module is successfully connected to the PC, the configurator automatically detects the device version and offer the appropriate parameter set.

All akYtec I/O modules have been tested for electromagnetic compatibility (EMC) and meet the high requirements of IEC 61326-1. This means that these modules can be operated under long-lasting electromagnetic interference.

The product portfolio of the I/O modules from akYtec is diversified and divided into several groups:

  • Analog input modules (8A, 8AS) These modules feature universal and configurable analog inputs for a wide range of TCs and RTDs. Various standard signals, e.g. 4-20 mA and 0-10 V are also supported.
  • Digital input modules (16D, 16DN)The inputs of these modules can receive various DC signals from switch contacts (relays, pushbuttons, etc.) and from 3-wire transmitters with PNP or NPN output.
  • Digital input and output modules (8D.4R)These modules can process up to 8 input signals from switch contacts and operate up to 4 relay outputs.
  • Analog output modules (8I, 6U)These devices feature 8 outputs 4-20 mA and 6 outputs 0-10 V.
  • Digital output modules (8R, 8K, 16R, 16K)These modules allow you to extend your PLC with up to 8 or up to 16 relay or transistor outputs.
  • 3-phase input modules (3M)In addition to measuring network current and voltage, the modules of this type can measure active, reactive and apparent power, fundamental frequency and phase angle.
  • Special input modules (1TD)These modules are designed for signal processing from strain gauges.