特性

• Three simultaneous mechanical actions occur when the key is inserted into the operating head to make it difficult to defeat with common tools
• Rugged cast aluminum body stands up to harsh industrial environments
• Three actuating key styles for mounting flexibility including a self-aligning version
• Choose from 1N.O.-1N.C. or 2N.C. DPDB contacts
• Operating head and switch body interlock for strength and a sure fit
• Four unique head mounting positions
• 1/2 – 14 NPT conduit entrance or pin connector versions
• All models meet UL, CSA, European and International requirements

"The E48 Safety Key Interlock Limit Switch is designed to be used with movable guards or covers which must be closed for operational safety. The key portion of the switch is affixed to the movable door, cover or other such guard. The switch itself is mounted to a rigid portion of the machine. When the guard is opened, the key is removed from the switch, thereby positively breaking the normally closed contacts. This interrupts the control circuit, stopping machine operation.","NEMA Standard Key Interlock Switch"