Current loading of electrical contacts - involves additional phased current imposed on contact by driver, triggered by pulse generator

摘要

A driver (1) allows a phased current to flow through the electric contact (8), and is timed by a control (2) using the outlet pulse train from a generator (4). At the same time, the control by connect to the address decoder (5) of an automation appts. (7), forces a current flow in the time during which the input (6) of the automation appts. is in communication with the electric contact. During the total time, the pulse train of the generator is controlled by a monitor (3), and a drop in the pulse train is reported to the automation appts. The driver is connected to the electric contact (8) via an advance resistor, and its input is connected to the output of the control, which receives its input signals from the generator and the address decoder of the automation appts. At the same time, the generator is connected to the monitor, which delivers its output signal to the automation appts., whose input is connected to the electric contact. USE/ADVANTAGE - For automated processes, with reliable detecting of an electric contact state.