Primary Contents

• What is an inverse input?
• Why are safety relays needed in safety circuits?
• What is the feedback circuit for in Safety Relay Units?
• What is the difference between an auto reset and manual reset?
• Why are two inputs required for Safety Relay Units?
• What is the difference between Safety Relays and Safety Relay Units?
• What is a positive common input?
• What is the difference between a Safety Relay and a General-purpose Relay?
• Why cannot Programmable Controller (PLC) or Programmable Terminal (PT) be used for safety circuits?
• How does a forcibly guided contact work?
• Can an NPN Safety Light Curtain be connected to the F3SP-B1P Control Unit?