HVAC, HMI and integration platform for building automation based on Beckhoff PLC


The CX9020 is a compact, DIN rail-mountable Ethernet control system with 1 GHz ARM Cortex™-A8 CPU. The connection for the Beckhoff I/O systems is directly integrated into the CPU module. The unit offers automatic bus system identification (K-bus or E-bus) and independently switches in the corresponding mode. The CX9020 comprises the CPU with two microSD card slots, the internal RAM and 128 kB NOVRAM as non-volatile memory. The basic configuration also includes two switched Ethernet RJ 45 interfaces, four USB-2.0 interfaces and a DVI-D interface. The RJ 45 interfaces are connected to an internal switch and offer a simple option for creating a line topology without the need for additional Ethernet switches. The operating system is Microsoft Windows Embedded Compact 7. TwinCAT 2 automation software transforms a CX9020 system into a powerful PLC and Motion Control system that can be operated with or without visualisation. Optionally, the unit can be ordered with a fieldbus, serial or audio interface.

The extended operating temperature range between -25 and +60 °C enables application in climatically demanding situations.

The order identifier of the basic CPU module is derived as follows:

Technical data
ARM Cortex™-A8, 1 GHz
Flash memory
256 MB microSD (optionally expandable), 2 x microSD card slot
Internal main memory
Persistent memory
128 KB NOVRAM integrated
2 x RJ 45 (Ethernet, internal switch), 10/100 Mbit/s, DVI-D, 4 x USB 2.0, 1 x optional interface
Diagnostics LED
1 x power, 1 x TC status, 2 x flash access, 2 x bus status
internal battery-backed clock for time and date (battery exchangeable)
Operating system
Microsoft Windows Embedded Compact 7, English
Control software
TwinCAT 2 PLC runtime or TwinCAT 2 NC PTP runtime
Power supply
24 V DC (-15 %/+20 %)
Dielectric strength
500 V (supply/internal electronics)
128 kbytes
Current supply I/O terminals
2 A
Max. power loss
5 W (including the system interfaces)
Dimensions (W x H x D)
85 mm x 100 mm x 91 mm
Operating/storage temperature
-25…+60 °C/-25…+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
Protection class
IP 20
TC3 performance class
economy plus (30), not yet available; please see here for an overview of all the TwinCAT 3 performance classes
More information on Beckhoff site