Tongue Switch

Tongue Operated Safety Interlock Guard 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.

They are designed to provide robust position interlock detection for moving guards.

Depending upon the risk assessment for the application, they can be used independently to provide positively operated contacts to IEC60947-5-1 or they can be used in combination with any dual channel safety monitoring relays to provide up to Category 4 PLe ISO13849-1 or SIL3 EN60261. 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.

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.

For the harsh environments like Food Processing, Pharmaceutical and Petro-Chemical Industries the Stainless Steel 316 range offers protection up to IP69K for use in high pressure chemical cleaning or CIP/SIP applications.

Solenoid Locking Tongue Safety Switches

IDEM's extensive range of Solenoid Locking Tongue Safety Switches has been designed to provide robust position interlock detection for moving guards and provide a lock mechanism to keep the guard closed until the hazard has been removed.

They are tongue operated and have been designed and manufactured in the UK to fit to the leading edge of sliding or hinged machine guards to provide positively operated switching contacts and provide a tamper resistant, not easily defeatable key mechanism.

Depending on the risk assessment for the application they can be used independently to provide positively operated contacts to IEC60947-5-1. Additionally they can be used in combination with any dual channel safety monitoring relays to provide up to PLe Category 4 to ISO13849-1 or SIL3 EN62061.

Available in various materials and housing styles to provide complete flexibility of choice depending upon the application. They offer a choice of contact blocks, LED diagnostics and various actuators to aid installation and maintain durability throughout the rigorous applications of Factory Automation, Packaging, Food Processing, Pharmaceutical and Petro-Chemical Industries.

EXPLOSION PROOF SAFETY Tongue Interlock Switches

IDEM's range of Explosion Proof Tongue Interlock Switches have been developed to satisfy the latest IECEx and ATEX Standards and provide Explosion Proof switching to satisfy the hazardous conditions created within the oil, chemical, pharmaceutical and food processing and packaging industries.

Designed to fit to the leading edge of sliding, hinged or lift off machine guards they provide positively operated switching contacts and provide a tamper resistant, not easily defeated key mechanism.

They combine Explosion Proof protection and satisfy high functional safety requirements all in one device.

They are available in a range of housings - extremely robust polyester (coloured red), die cast metal (painted red) or Stainless Steel 316 to satisfy virtually all applications where the potential for explosion exists.

They are manufactured with ATEX EExd IIC T6 certified explosion proof contact blocks. All electrical switching elements are fully encapsulated.

The range conforms to European harmonised standards EN60079-0 and EN60079-1 and are suitable for use in European Zones 1,2,21,22 environments (Gas and Dust).

All switches have been designed to satisfy the latest ISO13850 standard and the switch mechanism latches the instant the safety contacts open.

Designed for use in the Oil, Petro-Chemical, Food Processing and Packaging, Pharmaceutical industries where potential explosive atmospheres are present.