This video shows a functional test of Pilz's PNOZsigma safety relays that were returned by a customer claiming all of them were defective:
• PNOZ s3 (3 pieces):
www.pilz.com/en-CA/eshop/Relay-modules/Safety-relays-protection-relays/PNOZsigma-safety-relays/Monitoring-of-E-STOP-safety-gates-light-barriers/PNOZ-s3-24VDC-2-n-o/p/750103; and
• PNOZ s5 (1 piece):
www.pilz.com/en-CA/eshop/Relay-modules/Safety-relays-protection-relays/PNOZsigma-safety-relays/Time-monitoring/PNOZ-s5-24VDC-2-n-o-2-n-o-t/p/750105.
There was no description of the circumstances under which the safety relays were deemed to be defective. Therefore, the safety relays were tested as intended:
• in two different dual-channel a...