For what purpose is the Safety Relay Unit provided with a feedback circuit?
For example, a feedback circuit is employed to detect welding of the contact point of the contactor which drives motors.
In this case, even if the contact point is welded, the Safety Relay Unit does not restart thanks to this circuit, thus ensuring safety.
However, be sure to use double contactors.
For Safety Light Curtain Robust & Basic New Lineup. Understanding the Indicators at a Glance.
Compact (104.5 mm), lightweight (1.3 kg) and easy-to-install Safety Laser Scanner
Supports ISO 13849-1 (PLe/Safety Category 4). Can be used on higher risk level applications by connecting to Safety Controllers.