Switch in line connecting two systems includes logic circuit sensing voltages determining opening or closure for bi-directional communication

摘要

The circuitry (1) includes a switching unit (11) in and controlling, the connecting line (4) between two systems (2, 3). It also contains a switching logic unit (12) connected to the two systems. Depending on voltage(s) appearing at input(s) of the switching logic unit, the latter adopts one of two possible states. These are open or closed, the latter permitting bidirectional communication between the two systems.