CX5120-0111

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The CX5120-0111 is an intelligent and compact Embedded PC featuring an Intel Atom® E3815 processor with a clock speed of 1.46 GHz and 2 GB DDR3L RAM. Manufactured by Beckhoff as part of the CX Embedded PC Systems, it features IP20 protection and operates on a 24 V DC power supply. The PC offers 4 USB 2.0 interfaces and 40 GB SSD storage.

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Product Description:

The CX5120-0111 is a compact Embedded PC that enables precise control and efficient system integration for industrial automation. Designed for embedded control applications, the PC incorporates a flexible architecture that supports modular connectivity and reliable software execution. Beckhoff ensures streamlined compatibility through integrated features that match automation system requirements.

The CX5120-0111 embedded PC includes 2 × RJ45 Ethernet ports that support 10/100/1000 Mbit/s data rates to ensure fast and stable network communication. The system provides 1 × DVI-D video output that enables connection to digital display units for real-time monitoring. A single expansion interface slot is included that allows additional connectivity when system extension is needed. For operational diagnostics, the PC includes LED indicators that show the status of power, flash access, and bus communication. The real-time clock is battery-powered and designed to maintain accurate timing across system reboots. The replaceable battery supports long-term clock reliability. The PC runs Microsoft Windows Embedded Compact 7, that offers lightweight compatibility with automation software. The control environment is managed through TwinCAT 2 PLC software that allows logical control execution across connected systems. The software setup ensures accurate response to I/O events and synchronized task handling.

The CX5120-0111 PC meets EMC standards EN 61000-6-2 and EN 61000-6-4 that ensure electromagnetic compatibility in regulated conditions. The platform supports both E-bus and K-bus systems that are automatically detected during configuration. This enables seamless integration into distributed I/O networks. The diagnostic feedback provided by the front-panel indicators helps in monitoring system health during operation. The PC enables dependable operation in automation workflows where timing, control logic, and communication consistency are essential. The modular structure of the PC allows for scalable installation without changing the existing base unit. The integrated DVI-D port supports visualization systems that require clear digital signal transmission.

Cpu
Intel Atom® E3815, 1.46 GHz
Dimensions (w X H X D)
142 mm x 100 mm x 92 mm
Dvi-d Interface
1 x DVI-D (1920 x 1080 max.)
Ethernet Interfaces
2 separate MAC addresses
Fieldbus Connections
2x Ethernet 10/100/1000BASE-T
Flash Memory
40 GB SSD (SATA, CFast card)
Operating System
Microsoft Windows Embedded Compact 7 or Embedded Standard 7
Operating Temperature
-25...+60 °C
Power Consumption
Approx. 8 W
Power Supply
24 V DC (-15%/+20%)
Processor Cores
1
Protection Class
IP20
Ram
2 GB DDR3L RAM
Serial Interface
1 x RS232
Usb Interfaces
4 x USB 2.0
Symptom / Diagnostic Indicator Probable Cause Recommended Corrective Action
PWR LED off – unit will not start 24 V DC absent or internal fuse blown Check field wiring, measure supply, and replace fuse or power supply as required
System hangs during boot – OS never reaches TwinCAT Damaged CFast file-system, wrong BIOS setup, or card ejected Power-down, reseat/replace CFast; restore default BIOS; re-image system if necessary
TC LED red (Stop Mode) after power-up TwinCAT autostart disabled or configuration invalid From a Service PC set TwinCAT to Run and save boot project; correct PLC errors
TC LED yellow (PLC crash) Runtime exception in IEC 61131 code Review last PLC log, fix faulty code/module, rebuild and download project
HDD LED remains red or flashes incessantly CFast card suffering read/write errors or nearing end-of-life Backup data, install industrial-grade Beckhoff CFast, run chkdsk/image restore
FB1 / FB2 LED red or rapid blink Fieldbus (E-bus / EtherCAT) wiring, address, or module fault Inspect cabling & termination, verify slave addresses, replace faulty I/O slice
I/O ERR LED blink code on power-supply Terminal configuration doesn’t match stored scan Count blink pattern, compare to manual, correct order or ID of terminals
ERR LED red immediately on start-up – no boot Bootloader corrupted Re-flash firmware with Beckhoff USB stick; if LED stays red, return to service
Clock/time resets every boot; battery warning in logs RTC coin-cell (CR2032) exhausted (≥ 5 years) Replace battery (CR2032, observe polarity) and clear BIOS warning
“Data carrier ejected” message; device won’t boot CFast removed without shutdown Power-down, re-insert or replace card, then cold-start the CX5120-0111
Spec / Feature CX5120-0111 CX5130-0120 CX5140-0150 CX5020-0112 CX5010-0111 CX9020-0111
CPU / SoC Intel Atom E3815 Intel Atom E3827 Intel Atom E3845 Intel Atom Z530 Intel Atom Z510 Arm Cortex-A8
Physical cores 1 2 4 1 (HT) 1 1
Base clock (GHz) 1.46 1.75 1.91 1.6 1.1 1
RAM (GB) 2 DDR3 4 DDR3 4 DDR3 0.5 DDR2 0.5 DDR2 1 DDR3
Flash / Storage medium CFast + µSD (512 MB incl.) CFast + µSD CFast + µSD CompactFlash 128 MB CompactFlash 128 MB 2 × µSD (512 MB incl.)
Ethernet ports 2 × 1 GbE 2 × 1 GbE 2 × 1 GbE 2 × 1 GbE 2 × 1 GbE 2 × 100 Mb
USB 2.0 ports 4 4 4 4 4 4
Max. power consumption (W) 11 14 16 13 12 n/a
Typical OS options WEC 7 / WES 7 / Win 10 IoT WEC 7 / WES 7 / Win 10 IoT WES 7 / Win 10 IoT CE 6 / WES 2009 CE 6 / WES 2009 WEC 7
TwinCAT support (platform level) TC2/TC3 (40) TC2/TC3 (40) TC2/TC3 (60) TC2/TC3 (40) TC2/TC3 (40) TC2/TC3 (20)
Error code / LED indication What it means
PWR LED flashes red 8 × s-1 24 Vdc supply out-of-tolerance or over-current
PWR LED flashes red 3 × s-1 No CFast card detected or card defective
TC LED steady red TwinCAT in Stop mode – PLC not executing
TC LED steady yellow PLC exception/crash (TwinCAT 3 only)
K-BUS ERR LED fast continuous flash EMC interference on K-bus
K-BUS ERR LED: 3 slow flashes Command error – terminal missing/defective
K-BUS ERR LED: 4 slow flashes Data error – break behind PSU / end clamp missing
K-BUS ERR LED: 5 slow flashes Register-communication fault with terminal n
K-BUS ERR LED: 6 slow flashes Initialization/internal data error
K-BUS ERR LED: 7 slow flashes Process-image length mismatch (configuration changed)

Frequently Asked Questions about CX5120-0111:

Q: Does CX5120-0111 support expandable RAM?

A: No, the CX5120-0111 includes 2 GB DDR3 RAM that is not expandable. This fixed memory supports its embedded applications.

Q: How does CX5120-0111 maintain data during power loss?

A: It has an integrated 1-second UPS with 1 MB of persistent memory on the Compact Flash card. This ensures critical data retention.

Q: Why are there two RJ45 Gigabit Ethernet ports on CX5120-0111?

A: Two RJ45 ports enable independent network connections for communication and control. This supports flexible industrial network topologies.

Q: Does CX5120-0111 include flash memory cards?

A: No, the device has slots for CFast and microSD cards, but these cards are not included and must be purchased separately.

Q: How does CX5120-0111 handle I/O connections?

A: It supports E-bus or K-bus I/O connections with automatic recognition. This allows seamless integration with Beckhoff I/O modules.


Internal Product Review

  • ‘‘The CX5120-0111 embedded PC offers a single-core Intel Atom processor and 2 GB DDR3 RAM for stable control performance. It provides multiple interfaces, including USB 2.0 and DVI-D. The integrated 1-second UPS ensures data retention during power interruptions. Its compact size and low power consumption make it a practical choice.’’

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