Tutto sui PLC: la CPU
A practical engineering guide to PLC CPU operation, from deterministic scan cycles and I/O image tables to memory, communications, diagnostics, redundancy, processor sizing, and reliable system...
The BECKHOFF CX5120-0155 is an Embedded PC belonging to the CX5100 series, designed for DIN rail mounting in industrial automation environments. Powered by an Intel Atom E3815 processor with a clock frequency of 1.46 GHz and a single core, this controller is engineered to execute PLC, motion control, and visualization tasks within a compact housing. It is equipped with 2 GB of DDR3 RAM and operates under the Microsoft Windows 10 IoT Enterprise 2016 LTSB operating system, featuring the pre-installed TwinCAT 3 runtime (XAR) corresponding to performance level 40.
System integration is facilitated by two independent 10/100/1000 Mbit/s Ethernet ports, a DVI-D interface for display connection, four USB 2.0 ports, and one optional interface slot. The device supports automatic recognition of connected BECKHOFF I/O systems, accommodating both E-bus and K-bus terminals directly. For data integrity and safe shutdown procedures, the unit includes an integrated 1-second uninterruptible power supply (UPS) backed by persistent memory on a Compact Flash card, alongside an exchangeable battery-backed internal clock.
| Parameter | Specification |
|---|---|
| Manufacturer | BECKHOFF |
| Exact Model | CX5120-0155 |
| Processor | Intel Atom E3815, 1.46 GHz |
| Number of Cores | 1 |
| Main Memory | 2 GB DDR3 RAM (not expandable) |
| Persistent Memory | Integrated 1-second UPS (1 MB on Compact Flash card) |
| Flash Memory | Slot for CFast card and microSD card (cards not included) |
| Parameter | Specification |
|---|---|
| Operating System | Microsoft Windows 10 IoT Enterprise 2016 LTSB |
| Control Software | TwinCAT 3 runtime (XAR) |
| TwinCAT 3 Platform Level | Performance (40) |
| Parameter | Specification |
|---|---|
| Ethernet Interfaces | 2 x RJ45 10/100/1000 Mbit/s |
| Video Interface | 1 x DVI-D |
| USB Interfaces | 4 x USB 2.0 |
| Optional Interface | 1 x slot for optional interface |
| I/O Connection | E-bus or K-bus, automatic recognition |
| Parameter | Specification |
|---|---|
| Power Supply | 24 V DC (-15 % / +20 %) |
| Current Supply E-bus/K-bus | 2 A |
| Max. Power Consumption | 11 W |
| Max. Power Consumption (Loading UPS) | 18 W |
| Parameter | Specification |
|---|---|
| Dimensions (W x H x D) | 122 mm x 100 mm x 92 mm |
| Weight | approx. 975 g |
| Protection Rating | IP20 |
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
| Relative Humidity | 95 %, no condensation |
| 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 |
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Returns & Warranty

The BECKHOFF CX5120-0155 is an Embedded PC belonging to the CX5100 series, designed for DIN rail mounting in industrial automation environments. Powered by an Intel Atom E3815 processor with a clock frequency of 1.46 GHz and a single core, this controller is engineered to execute PLC, motion control, and visualization tasks within a compact housing. It is equipped with 2 GB of DDR3 RAM and operates under the Microsoft Windows 10 IoT Enterprise 2016 LTSB operating system, featuring the pre-installed TwinCAT 3 runtime (XAR) corresponding to performance level 40.
System integration is facilitated by two independent 10/100/1000 Mbit/s Ethernet ports, a DVI-D interface for display connection, four USB 2.0 ports, and one optional interface slot. The device supports automatic recognition of connected BECKHOFF I/O systems, accommodating both E-bus and K-bus terminals directly. For data integrity and safe shutdown procedures, the unit includes an integrated 1-second uninterruptible power supply (UPS) backed by persistent memory on a Compact Flash card, alongside an exchangeable battery-backed internal clock.
| Parameter | Specification |
|---|---|
| Manufacturer | BECKHOFF |
| Exact Model | CX5120-0155 |
| Processor | Intel Atom E3815, 1.46 GHz |
| Number of Cores | 1 |
| Main Memory | 2 GB DDR3 RAM (not expandable) |
| Persistent Memory | Integrated 1-second UPS (1 MB on Compact Flash card) |
| Flash Memory | Slot for CFast card and microSD card (cards not included) |
| Parameter | Specification |
|---|---|
| Operating System | Microsoft Windows 10 IoT Enterprise 2016 LTSB |
| Control Software | TwinCAT 3 runtime (XAR) |
| TwinCAT 3 Platform Level | Performance (40) |
| Parameter | Specification |
|---|---|
| Ethernet Interfaces | 2 x RJ45 10/100/1000 Mbit/s |
| Video Interface | 1 x DVI-D |
| USB Interfaces | 4 x USB 2.0 |
| Optional Interface | 1 x slot for optional interface |
| I/O Connection | E-bus or K-bus, automatic recognition |
| Parameter | Specification |
|---|---|
| Power Supply | 24 V DC (-15 % / +20 %) |
| Current Supply E-bus/K-bus | 2 A |
| Max. Power Consumption | 11 W |
| Max. Power Consumption (Loading UPS) | 18 W |
| Parameter | Specification |
|---|---|
| Dimensions (W x H x D) | 122 mm x 100 mm x 92 mm |
| Weight | approx. 975 g |
| Protection Rating | IP20 |
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
| Relative Humidity | 95 %, no condensation |
| 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 |
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Germany
|