Electronic simulator for motor or jacking system - comprises gating circuits driving end of travel signalling circuits with LED's indicating travel position

摘要

The simulator comprises a number of modules each of which represents a motor or hydraulic jacking system. Each module has a selector switch which permits selection of the type of equipment to be simulated. This switch applies fixed logic signals to the inputs of NAND gates. Other inputs are received from forward or reverse action inputs and are signalled by LED indicators. The logic circuits drive an up-down counter using a clock signal common to all the modules. The counter drives a decoder with LED's at its output to indicate position of the jack or motor system. Transistor relay drivers driven from the gating circuits provide end of travel signals for the forward or reverse directions.