US 11,726,466 B2
Safety detector and safety detection system including said safety detector
Patrick Leyx, Angoulême (FR); and Christophe Deschamps, Saint Martin d'Hères (FR)
Assigned to Schneider Electric Industries SAS, Rueil Malmaison (FR)
Filed by Schneider Electric Industries SAS, Rueil Malmaison (FR)
Filed on Dec. 10, 2020, as Appl. No. 17/117,323.
Claims priority of application No. 1914257 (FR), filed on Dec. 12, 2019.
Prior Publication US 2021/0181731 A1, Jun. 17, 2021
Int. Cl. G05B 23/02 (2006.01); G05B 9/02 (2006.01)
CPC G05B 23/0216 (2013.01) [G05B 9/02 (2013.01); G05B 23/0213 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A safety detector comprising two supply terminals, a first control input and a first control output, a first safety output and a second safety output, a first free terminal and a second free terminal and a second control input connected to the first free terminal and a second control output connected to the second free terminal, the safety detector further comprising a control and processing unit configured for:
reading a control signal at an input;
applying a first test sequence comprising disabling the first control output and testing a start loop connected between the second control output and the first control input and/or a second test sequence comprising disabling the second control output and testing a start loop connected between the first control output and the second control input; and
applying a third test sequence comprising reading a status of the first control output and a status of the second control output.