# Operation Mode

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Both operation modes RS232 and RS485 are possible with the same hardware.

•RS232 is a two wire point to point communication.

•RS485 is a four wire system (full duplex) or a two wire system (half duplex) and supports also multiple device communication.

| Enum | Description
Operation Mode | RS232 | Communication over RS232 Use Pin RXD and TXD
RS485 | Communication over RS485 Use Pin A,B,X,Y
Service Interface Over RS232 | Communication with CPA over RS232 Use Pin RXD and TXD