# Beckhoff CX5140

Hardware · `CX5140` · verification: source checked

The CX5140 is a fanless Embedded PC with an Intel Atom E3845 quad-core processor clocked at 1.91 GHz and 4 GB of non-expandable DDR3 RAM. It offers two Gigabit-capable Ethernet interfaces, four USB 2.0 ports, a DVI-I output and one optional interface slot, and connects to I/O through E-bus or K-bus terminals. With a TwinCAT runtime installed it runs PLC, PLC/motion control and interpolating axis applications, with or without visualization.

## Specification

| Property | Value |
|---|---|
| Category | embedded pc |
| Weight | 1.095 kg |
| Ethernet ports | 2 |
| Processor | Intel Atom® E3845, 1.91 GHz |
| Supply voltage | 24 V DC (-15 %/+20 %) |
| Power consumption | 0.016 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

- Protection rating IP20.
- Approvals/markings: CE, UL, DNV; ATEX, IECEx, cFMus and CCC only with ordering option CX2900-0107.
- Use in hazardous areas zone 2/22 or Class I, Div. 2 requires the CX2900-0107 device modification, which is mandatory for CX5140.
- Ex marking with CX2900-0107: ATEX II 3G Ex ec IIC T4 Gc; IECEx Ex ec IIC T4 Gc; cFMus Class I, Division 2, Groups A, B, C, D and Class I, Zone 2, AEx ec IIC T4 Gc.
- The device documentation for use in hazardous areas must be read carefully.
- 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.

## Study notes

- Four processor cores; Windows Embedded Compact 7 only supports one CPU core.
- Memory: 4 GB DDR3 RAM, not expandable; storage via CFast card slot and microSD card slot, cards not included.
- Integrated 1-second UPS with 1 MB on the CFast card.
- I/O connection is E-bus or K-bus with automatic recognition; E-bus/K-bus current supply 2 A.
- Max. power consumption with UPS loading is 23 W; E-bus/K-bus max. power consumption 10 W (5 V/max. 2 A).
- Dimensions (W x H x D) 142 mm x 100 mm x 92 mm; weight approx. 1095 g.
- Operating systems: Windows Embedded Compact 7, Windows Embedded Standard 7, Windows 10 IoT Enterprise 2016 LTSB / 2019 LTSC / 2021 LTSC, TwinCAT/BSD.
- Control software: TwinCAT 2 runtime, TwinCAT 3 runtime (XAR); TwinCAT 3 platform level Performance Plus (50).
- Windows Embedded Compact 7 and TwinCAT/BSD require a CFast card of at least 20 GB; Windows Embedded Standard 7 and Windows 10 IoT Enterprise require at least 40 GB.
- Product status: regular delivery, not recommended for new projects; recommended alternative CX5340.
- Optional interfaces available ex factory include RS232/RS485/RS422, DVI-D, DisplayPort, audio, EtherCAT master/slave, PROFIBUS master/slave, CANopen master/slave and PROFINET RT controller/device.
- Storage temperature -40 to +85 °C; relative humidity 95%, no condensation; internal battery-backed clock with exchangeable battery.

## Sources

1. [Embedded PC with Intel Atom® E3845](https://www.beckhoff.com/en-en/products/ipc/embedded-pcs/cx5100-intel-atom-r/cx5140.html) (accessed 2026-10-25)

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