Embedded PC with BACnet/IP CX8191
Ethernet RJ45
Ethernet RJ45
Ethernet port
Address selector
Power LEDs
Input for
power contacts
Power contacts
Coupler supply
E-bus or K-bus
Front flap
extended temperature range

CX8191 | Embedded PC with BACnet/IP

The CX8191 is a control system with a switched Ethernet port. It supports the BACnet protocol. E-bus or K-bus terminals can be attached as required; the CX8191 automatically recognizes the type of I/O system connected during the start-up phase.

The control system is programmed with TwinCAT 3 via the fieldbus interface or the additional Ethernet interface. TwinCAT 3 licenses must be ordered via the TwinCAT 3 price list. The BACnet license is already installed on the device and does not need to be ordered separately.

BACnet (Building Automation Control Network) is a standardized, manufacturer-independent communication protocol for building automation. Areas of application include HVAC, lighting control, safety and fire alarm technology.

In conjunction with the EL6861 BACnet-MS/TP terminals, the CX8191 can act as a router to MS/TP networks including support for several MS/TP networks. In addition, further protocols and services can be supported, such as OPC UA, MQTT or Modbus TCP/RTU. Therefore, the CX8191 is a virtually universal device that can be used very flexibly, from control tasks through to gateway functions.

Technical data CX8191
Processor ARM Cortex™-A9, 800 MHz (TC3: 20)
Flash memory slot for microSD card, 512 MB included (expandable)
Main memory 512 MB DDR3 RAM (not expandable)
Protocol BACnet (client and server) according to ISO 16484-5:2012 (revision 14)
Programming TwinCAT 3
Interfaces 1 x RJ45 10/100 Mbit/s, bus interface
Bus interface 2 x RJ45 (switched)
Data transfer rates 100 Mbit/s
I/O connection E-bus or K-bus, automatic recognition
Power supply 24 V DC (-15 %/+20 %)
Clock internal battery-backed clock for time and date (battery behind the front flap, exchangeable)
UPS 1-second UPS
Operating system Microsoft Windows Embedded Compact 7
Current supply E-bus/K-bus 2 A
Max. power consumption 4 W
Max. power consumption (with loading UPS) 9 W
Dimensions (W x H x D) 71 mm x 100 mm x 73 mm
Weight approx. 230 g
Operating/storage temperature -25…+60 °C/-40…+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
Approvals/markings CE
BACnet/IP For further BACnet/IP products please see the system overview.