Primary Contents

• What is direct opening force (DOF)?
• What is pretravel (PT)?
• What is diversity?
• What is the processing for the conduit section, and what are the recommended connectors for D4B-[]N Safety Limit Switch?
• What is a form lock mechanism?
• What is negative operation and positive operation?
• What is slow action?
• What is a snap action?
• What is a direct opening mechanism (forcibly opened contacts) ?
• What is the difference between the Safety Limit Switches and the General Limit Switches?
• What is direct opening travel (DOT)?
• What is redundancy?
• What are the symbols for NC and NO contacts?
• What is the conduit section?
• What is total travel (TT)?
• What is Y/Za/Zb?