# Beckhoff CX9240

Hardware · `CX9240` · verification: source checked

The CX9240 is a DIN rail-mountable embedded PC used as an Ethernet control system for PLC and motion control applications. It runs Beckhoff RT Linux on a four-core 1.2 GHz Arm Cortex-A53 CPU with 2 GB LPDDR4 RAM, two independent 1 Gbit Ethernet interfaces, four USB 3.0 ports and a DisplayPort. The operating system, TwinCAT and user projects are stored on an interchangeable microSD card, and Beckhoff I/O systems connect directly to the CPU module via E-bus or K-bus.

## Specification

| Property | Value |
|---|---|
| Category | embedded pc |
| Weight | 0.65 kg |
| Ethernet ports | 2 |
| Processor | Arm® Cortex®-A53, 1.2 GHz |
| Supply voltage | 24 V DC (-15%/+20%), electrically isolated |
| Power consumption | 0.007 kW |
| IP rating | IP20 |
| Operating temp min | -25 °C |
| Operating temp max | 60 °C |

## Connected

- Manufacturer: [Beckhoff Automation](https://machineschema.com/manufacturer/beckhoff.md)

## Safety

- Approvals/markings: CE, UL.
- Protection rating IP20.
- Operating temperature range -25 to +60 °C; storage temperature -40 to +85 °C.
- Relative humidity 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.
- Power supply 24 V DC (-15%/+20%), electrically isolated.
- Integrated 1-second UPS buffers the supply in case of power failure.
- RoHS compliant with exemption; contains lead (REACH SVHC).

## Study notes

- TwinCAT 3 runtime (XAR) requires TwinCAT 3.1 Build 4026 (XAE) or later.
- Main memory is 2 GB LPDDR4 RAM and is not expandable.
- Boot and storage medium is a microSD card (not included) with a minimum capacity of 16 GB.
- I/O connection is E-bus or K-bus with automatic bus system identification.
- E-bus/K-bus current supply is 2 A; max power consumption on E-bus/K-bus is 10 W (5 V, max 2 A).
- Max power consumption is 7 W, or 12 W while the integrated UPS is loading.
- One multi-option interface can be assigned ex factory, e.g. RS232, RS485/RS422, 2x EtherCAT master, EtherCAT slave, PROFIBUS master/slave, CANopen, or a 2-port Ethernet switch.
- Diagnostics LEDs: 1x power, 1x TC status, 1x flash access, 2x bus status.
- Internal real-time clock is capacitor-buffered with storage capacity greater than 21 days.
- Cooling is passive; dimensions are 84 mm x 100 mm x 91 mm (W x H x D).
- Integrated 1-second UPS with 1 MB on the microSD card; UPS OCT-capable: no.
- TwinCAT 3 platform level Economy Plus (30).

## Sources

1. [Embedded PC with Arm® Cortex®-A53](https://www.beckhoff.com/en-en/products/ipc/embedded-pcs/cx9240-arm-r-cortex-r-a53/cx9240.html) (accessed 2026-10-25)

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