Safety control circuits have been segmented, depending on their ability to maintain their integrity
in the event of a failure
In the United States, only one level of safety system integrity has been defined: control reliability
typically incorporates redundant
controls and self-checking circuitry to maintain a safe working environment.
Typically, both ANSI
have associated control reliability
requirements with the point of operation
of hazardous machines, where operators
feed and remove parts.
Integrity: (Machine Safety) The degree to which a circuit, system or device can be expected to perform an anticipated function unimpaired in the even of a fault. [ MORE »