INPUT/OUTPUT MODULE HAVING A COMBINATION INPUT/OUTPUT POINT

摘要

A combination input/output (I/O) module (11) for a microprocessor based device is disclosed. The combination I/O module (11) includes a combination point (15) which is operable as either an input point adapted for coupling to an input device (17), an output point adapted for coupling to an output device (19) or both. The combination I/O module (11) provides continuous sensing of the presence or absence of the output device (19). The combination I/O module (11) includes a triac (21) and provides for continuous sensing of the conductive state of the triac (21).