he CompuLab Interface from the [ [ modulbus ] ] company is a robust and professional solution to connect the DigitalSimulator via the serial interface.
8 digitale out (CMOS-TTL-Output with max. 20 mA/channel)
8 digitale input (5 V (max. 24V). Aktiv LOW)
2 analoge input (not supported from the DigitalSimulator)