Communication Hub & Compact Controller Module

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On-Board Ethernet Switch

With 5 total Ethernet connections and optional BroadR-Reach, this controller allows for centralized communications from peripheral devices that require high-speed data transmission.


A next-generation machine controller built for advanced applications


The ESX.4cs-gw is a compact, modern-designed fourth generation control unit from STW. As a freely programmable communications gateway, it not only offers controller capabilities, but can also operate as a communications hub for the entire onboard vehicle network. With multiple ethernet switch options available, it is ready for the latest in high-speed machine peripherals.


The ESX.4cs-gw controller supports programming in C language and IEC61131-3 languages. Application development is done using openSYDE paired with logi.CAD. Learn more about application development for 4 Series Controllers here.


  • CAN interfaces:  6
  • RS232 interface:  1
  • Ethernet interfaces:  Up to 5
    • Options
      • 1 Gbit
      • BroadR-Reach
      • 100 Mb (for diagnostics monitoring)
  • LIN x 1
  • I/O interfaces
    • Inputs
      • Analog Inputs x 4
      • Multi Inputs x 8
    • Outputs
      • Digital/PWM Outputs x 4


  • Processor:  32 bit Aurix TC299 Multi-core  (up to 300MHz)
  • RAM:  2 MB Internal
  • Flash:  8 MB Internal
  • Data Flash:  16 MB Internal
  • EEPROM:  32 kB


  • Manufactured in Germany using the latest in advanced electronics for mobile machines and off-highway vehicles
  • Compact - small footprint without sacrificing computing power
  • Freely programmable - SIL2 rated for mobile off-highway industry safety standards
  • Cast aluminum housing - high resistance to shock, vibration, EMI/EMC, and drastic changes in temperature
  • Mean Time Between Failure (MTBF) of up to 50 years

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