Please download the dossier by clicking on the dossier button x
×

Lighting relay panel features for improved safety and reliability

  • US 10,129,950 B1
  • Filed: 03/01/2018
  • Issued: 11/13/2018
  • Est. Priority Date: 04/26/2017
  • Status: Active Grant
First Claim
Patent Images

1. A relay control interface for controlling a plurality of relays, comprising:

  • a first relay drive circuit connected to a first relay, wherein the first relay drive circuit includes a first relay close input, a first relay open input, and a first relay output based on a voltage across a first current sense resistor;

    a second relay drive circuit connected to a second relay, wherein the second relay drive circuit includes a second relay close input, a second relay open input, and a second relay output based on a voltage across a second current sense resistor;

    a relay sense circuit, wherein the first relay output is connected to a first input of the relay sense circuit and the second relay output is connected to a second input of the relay sense circuit, the first and second inputs of the relay sense circuit are connected to an input of an op amp, and an output of the op amp indicates current through an actuator of the first relay or current through an actuator of the second relay and is connected to an output of the relay sense circuit; and

    a controller connected to the first relay close input and the first relay open input for controlling the first relay, connected to the second relay close input and the second relay open input for controlling the second relay, and connected to the output of the relay sense circuit,wherein the controller determines a first relay actuation delay for the first relay based on a time difference between a first control signal on the first relay close input and a first output signal on the output of the relay sense circuit and determines a second relay actuation delay for the second relay based on a time difference between a second control signal on the second relay close input and a second output signal on the output of the relay sense circuit.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×