Publication 1752-UM001A-EN-P - October 2006
Glossary 233
system reaction time
The worst-case time from a safety-related event as input to the system
or as a fault within the system, until the time that the system is in the
safety state. System reaction time includes sensor and activator
reaction times as well as the controller reaction time.
test pulse
A signal used to detect when external wiring comes into contact with
the power supply (positive), or to identify short-circuits between
signal lines.