DMC is 485 but not standard. You need a 232 to 485 converter and it will not work with any kind of USB serial adapter. It needs a native serial port with the correct ACPI driver. The 3 Schindler controllers are all the same and use the same HHT program. They’re straight 232 like a Tac20. Use a 9 to 25 pin cable or adapter. NO NULL MODEM.
