Patent ID: 9054725
Filing Date: 2015-06-09
Classification: H04L

Abstract:
1. A signal powered controller, with failure detection ability and a digital display, capable of measuring an input signal from an input current loop and transmitting the signal over an optical isolator, to a desired output current loop, the controller comprising: a. a signal input circuit ( b. the energy storage device ( c. the microcontroller ( d. the optical isolator ( e. the signal transmitter circuit ( wherein when an input signal ( 211 , 212 ) is supplied to the controller, the signal input circuit uses the current provided by the input signal to generate a voltage ( 213 ) as well as a ground ( 214 ) that powers the microcontroller and the input circuit, whereupon the voltage charges the energy storage device, whereupon the energy storage device ( 220 ) delivers power to the microcontroller ( 200 ) when a input signal is not present, whereupon the input signal ( 211 , 212 ) is linearly transformed by the input signal circuitry into an intermediate signal ( 215 , 216 ) which is positive with respect to the A/D ground, and input to the analog-to-digital converter of the microcontroller, whereupon, the microcontroller detects the intermediate signal and generates a signal measurement, whereupon the microcontroller outputs a pulse-width modulated signal ( 251 ) representing the signal measurement to the first pulse-width modulated output, whereupon the pulse-width modulated version of the signal is transmitted to the optical isolator ( 250 ), which acts as an isolation barrier that electrically separates the input signal circuit ( 210 ) from the transmitter circuit ( 260 ), whereupon the optical isolator acts as a switch in the transmitter circuit, which opens and closes as the pulse width modulated signal is sent to the optical isolator, whereupon the transmitter circuit generates a corresponding output signal based upon the signal received by optical isolator, which is transmitted to the output current loop ( 261 , 262 ).