Low level voltage programmable logic control

Details Low level voltage programmable logic control Low level voltage programmable logic control

H - Electricity

02

H

348/26

H02H 3/093 (2006.01)

Patent

CA 1280500

ABSTRACT A universal programmable logic control device for monitoring the current of a circuit and for signalling a circuit control device, such programmable logic control device including; electrical power circuitry for activating the circuit control device; electrical circuitry for monitoring the current in the electrical circuit, such electrical circuitry including, adjustable electrical signal input circuitry to match the programmable logic control device to the electrical current in the circuit, adjustable pick-up circuitry for adjusting the level of the current monitored in the electrical circuit, adjustable time circuitry for adjusting the time duration of the selected level of electrical current, so as to command the electrical power circuitry to activate the control device when the electrical current in the electrical circuit reaches the selected level and time duration; and a zenor diode in reverse mode for controlling the level of voltage applied to the adjustable pick-up circuitry and time circuitry substantially without resistive burden, the zenor diode in reverse mode passing a reference voltage which is less than an input voltage to the said device.

528091

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