US 12,222,701 B2
Control device with guard module
Winfried Gruber, Ostfildern (DE)
Assigned to Pilz GmbH & Co. KG, Ostfildern (DE)
Filed by Pilz GmbH & Co. KG, Ostfildern (DE)
Filed on Oct. 22, 2021, as Appl. No. 17/508,952.
Claims priority of application No. 102020128026.2 (DE), filed on Oct. 23, 2020.
Prior Publication US 2022/0128965 A1, Apr. 28, 2022
Int. Cl. G05B 19/406 (2006.01); H04L 41/046 (2022.01)
CPC G05B 19/406 (2013.01) [H04L 41/046 (2013.01); G05B 2219/50193 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A guard apparatus for monitoring operability of an input module and an output module of a control device having a modular structure, the guard apparatus comprising:
a bus module part configured to receive state information from at least one of the input module and the output module;
a logic module part configured to evaluate the state information from the input module and the output module; and
an output module part configured to confirm an output signal of the output module based on the evaluation,
wherein:
the input module and the output module form a first potential group within the modular structure, and
at least the logic module part of the guard apparatus forms a second potential group independent of the first potential group within the modular structure.