CIRCUIT FOR SWITCHING THE ACTUATOR OUTPUTS OFF IN AN ASI SYSTEM IN THE EVENT OF DATA COMMUNICATION FAILURE

摘要

The circuit of the invention makes it possible to switch in a defined manner the output switching stages (5) off in an actuator-sensor-interface system on the failure of data communication. This is attained by a timer (3) controlled by trigger pulses available at the data strobe connector (2) of the circuit (1) during data communication. If there are no trigger pulses, a downstream electric switch (4) opens so that the output switching stages (5) are cut off from the d.c. power supply.