US 11,852,691 B2
Input/output (IO) module power supply with online load test capability
John R. O'Connell, Painesville, OH (US); and Edward C. Hopsecger, Mentor, OH (US)
Assigned to Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US)
Filed by Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US)
Filed on Aug. 24, 2021, as Appl. No. 17/410,659.
Prior Publication US 2023/0065352 A1, Mar. 2, 2023
Int. Cl. G01R 31/40 (2020.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 3/155 (2006.01)
CPC G01R 31/40 (2013.01) [H02M 1/0009 (2021.05); H02M 1/08 (2013.01); H02M 3/155 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a first voltage supply configured to supply an output current to a load;
testing circuitry coupled to the first voltage supply, wherein the testing circuitry comprises:
a second voltage supply;
a switch configured to close in response to a voltage signal from the second voltage supply; and
a current measurement circuit configured to couple to the switch, wherein the current measurement circuit is configured to receive the output current from the first voltage supply while the switch is closed; and
a control system configured to:
receive an indication of a voltage across the current measurement circuit while the switch is closed from a sensing circuit;
determine an amount of current present in the output current based on a resistance value associated with the current measurement circuit and the voltage; and
perform an operation based on the amount of current.