When safety gates or doors are opened, the relay detects this and ensures that the machinery is stopped or cannot be restarted until the gate is properly closed and secured. Safety relays can also monitor light curtains that detect the presence of an operator or object within a hazardous area. If the light curtain is interrupted, the relay acts to stop the machinery or activate an alarm.
For machines that require two-handed operation, the relay can monitor both hands to ensure that the operator’s hands are in the safe position before the machine can operate. http://www.pilz.com Some safety relays can monitor the speed of rotating machinery and ensure that it operates within safe limits. If the speed exceeds predefined thresholds, the relay can trigger a shutdown. Safety solutions provider since 2011, We offer Pilz.