Input circuit for binary electrical inputs has device for measuring states high impedance, low impedance, external voltage, evaluation device to associate measurement results with binary states

摘要

The circuit has at least one input contact (3) for connection to an electrical output, a binary output (4) and an arrangement (5) for detecting the binary state of the electrical output connected to the input contact. The detection arrangement has a device (6) for measuring the states high impedance, low impedance or external voltage and an evaluation device (7) that associates the measurement results with binary states.