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Beckhoff CX7291

The Beckhoff CX7291 is an embedded PC in the CX7000 series with an Arm Cortex-A9 single-core processor at 720 MHz. It provides eight multi-functional digital inputs and four multi-functional outputs, a microSD card slot, an Ethernet interface, and a switched RJ45 bus interface for BACnet/IP. It runs TwinCAT/RTOS and is programmed with TwinCAT 3 over the Ethernet interface.

Source checked9/9 values · 2026-10-25Beckhoff AutomationEmbedded PC
IP rating
IP20
Weight
0.22kg

Specification

1 source
Categoryembedded pc
ProcessorArm® Cortex®-A9, 720 MHz
Supply voltage24 V DC (-15%/+20%)
Power consumption0.004 kW
Operating temp min-25 °C
Operating temp max60 °C

Quick answers

How much does the Beckhoff CX7291 weigh?
0.22 kg, per Embedded PC with Arm® Cortex®-A9, BACnet/IP and integrated I/Os (beckhoff.com).
What is the IP rating of the Beckhoff CX7291?
IP20, per Embedded PC with Arm® Cortex®-A9, BACnet/IP and integrated I/Os (beckhoff.com).

Study notes

  • CX7000 series has eight integrated multi-functional inputs (24 V DC) and four integrated multi-functional outputs (24 V DC, 0.5 A, 1-wire connection technology).
  • E-bus or K-bus terminals can be attached; the CX7291 automatically recognizes the connected I/O system during start-up.
  • The control system is programmed with TwinCAT 3 via the Ethernet interface.
  • Operating system is TwinCAT/RTOS; control software is TwinCAT 3 runtime (XAR) from TwinCAT 3.1 Build 4026 (XAE).
  • Flash memory: slot for microSD card with 512 MB included, optionally expandable; main memory is 512 MB DDR3 RAM (not expandable).
  • Integrated 1-second UPS with 1 MB on microSD card; internal capacitor-buffered real-time clock stores time/date for more than 21 days.
  • Bus interface has 2 x RJ45 switched ports with BACnet/IP at 10/100/1000 Mbit/s; the separate interface includes 1 x RJ45 10/100/1000 Mbit/s.
  • Multi-functional I/O includes digital input EN 61131-2 type 3, digital output, counter (32-bit; 20 kHz up/down, 100 kHz up), incremental encoder interface (32-bit; 250,000 increments with 4-fold evaluation, 62.5 kHz), two analog inputs (0–10 V, 12-bit, 2 kHz filter), and two PWM outputs (15 Hz–100 kHz).
  • Included TwinCAT 3 functions: TC1000 ADS, TC1100 I/O, TC1200 PLC, TF4100 Controller Toolbox, TF4110 Temperature Controller, TF6255 Modbus RTU, TF6340 Serial Communication, TF6701 IoT Communication (MQTT), TF6730 IoT Communicator, TF6760 IoT HTTPS/REST, TF8020 BACnet/IP, TF8040 Building Automation.
  • TwinCAT 3 platform level: Basic (10).
  • Cooling is passive; diagnostics LEDs: 1 x TC status, 1 x WD, 1 x error.
  • Dimensions are 71 mm x 100 mm x 73 mm.

Safety

  • Approvals/markings: CE, UL.
  • EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4.
  • Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27.
  • Relative humidity: 95%, no condensation.
  • Storage temperature: -40…+85°C.
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