Tongue Interlock Safety Switches

IDEM Tongue operated Safety Interlock switches are designed to fit to the leading edge of sliding, hinged or lift off machine guards to provide positively operated switching contacts and provide a tamper resistant, not easily defeatable key mechanism.

IDEM tongue interlock switches are designed to provide robust position interlock detection for moving guards.

Depending upon the risk assessment of the application, they can be used independently to provide positively operated contacts to IEC 60947-5-1 or they can be used in combination with any dual channel safety monitoring relays to provide up to Category 4 PLe ISO 13849-1 or SIL3 EN62061. They are available in various materials and housing styles to provide complete flexibility of choice depending upon the application. They offer a choice of contact blocks (including Explosion Proof) and various actuators to aid installation and maintain durability.

IDEM Operation Use

The switch is rigidly mounted to the frame of the guard or machine. The actuator is fitted to the moving part (frame) of the guard and is aligned to the switch entry aperture. The actuator profile is designed to match a cam mechanism within the switch head and provides a positively operated not easily defeatable interlock switch. When the actuator is inserted into the switch the safety contacts close and allow the machine start circuit to be enabled. When the actuator is withdrawn from the switch the safety contacts are positively opened and the machine circuit is broken. Standard versions use high specification plastic or die-cast housing and are sealed to IP67 and provide long term protection against moisture ingress. For harsh applications like Food Processing, Pharmaceutical and Chemical Industries the Stainless Steel 316 range offers protection up to IP69K for use in high pressure chemical cleaning or CIP/SIP applications.

IDEM Tongue Operated Safety Interlock Product Range

• IDIS-1: Tongue Interlock Safety Switch
• IDIS-2: Hinge Interlock Safety Switch
• K-15 & K-15-SS: Tongue Switches
• KP & KP-SS: Kobra Interlock Switch
• KM: Kobra Metal Tongue Switch
• K-SS: Stainless Steel Tongue Switch HYGIECAM
• KM-SS: Stainless Steel Interlock HYGIECAM

For more information about IDEM Tongue operated Safety Interlock Switches, contact More Control on 0345 00 00 400.