The CX8080 has two serial interfaces: one with RS232 and one with RS485 physics. Both serial interfaces are on the D-sub socket.
They are not bound to a particular protocol and can be expanded with the appropriate TwinCAT supplements for the different serial communication protocols.
Alternatively, K-bus or E-bus terminals can be series-connected; the CX8080 automatically detects which system is connected during the start-up phase.
The controller is programmed via the additional Ethernet interface.