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Beckhoff CX8090

The Beckhoff CX8090 is a control system with an Arm9 processor running Windows Embedded CE 6 and TwinCAT 2 PLC. It connects to K-bus or E-bus I/O terminals, which it detects automatically at startup, and supports Modbus TCP plus Ethernet and TCP/IP communication. It is programmed with TwinCAT through a fieldbus or Ethernet interface.

Source checked9/9 values · 2026-10-25Beckhoff AutomationPLC
IP rating
IP20
Weight
0.18kg

Specification

1 source
Categoryplc
ProcessorArm9™, 400 MHz
Supply voltage24 V DC (-15%/+20%)
Power consumption0.003 kW
Operating temp min0 °C
Operating temp max55 °C

Quick answers

How much does the Beckhoff CX8090 weigh?
0.18 kg, per Embedded PC with Arm9™ and 2-port Ethernet switch (beckhoff.com).
What is the IP rating of the Beckhoff CX8090?
IP20, per Embedded PC with Arm9™ and 2-port Ethernet switch (beckhoff.com).

Study notes

  • Product status is regular delivery but not recommended for new projects; the recommended alternative is CX8290.
  • Programming languages: IEC 61131-3; control software: TwinCAT 2 PLC; web visualization and web-based management are supported.
  • Flash memory is a microSD slot with 512 MB card included and optional expansion; main memory is 64 MB DDR2 RAM and is not expandable.
  • Includes an integrated 1-second UPS with 1 MB on the microSD card.
  • Bus interface provides 2 x RJ45 switched ports at 100 Mbit/s; I/O connection is E-bus or K-bus with automatic recognition.
  • Interfaces include 1 x RJ45 10/100 Mbit/s, 1 x USB device behind the front flap, and 1 x bus interface.
  • Dimensions are 64 mm x 100 mm x 73 mm; storage temperature range is -25…+85°C.
  • Relative humidity rating is 95%, no condensation.
  • Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27; EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4.
  • Supports ADS UDP/TCP and open TCP/IP-UDP/IP communication in addition to Modbus TCP.
  • Windows Embedded CE 6 extended support has ended; up-to-date security updates can no longer be provided.
  • Internal battery-backed clock for time and date; battery is behind the front flap and exchangeable.

Safety

  • Approvals/markings: CE, UL, ATEX, IECEx, cFMus.
  • ATEX marking: II 3G Ex nA IIC T4 Gc; II 3D Ex tc IIIC T135°C Dc.
  • IECEx marking: Ex nA IIC T4 Gc; Ex tc IIIC T135°C Dc.
  • cFMus marking: Class I, Division 2, Groups A, B, C, D; Class I, Zone 2, AEx ec IIC T4 Gc.
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