Explosion Proof Trapped Key Interlocks

The SKORPION Trapped Key System has been developed to provide extremely robust mechanical coded key safeguarding and interlocking for hazardous machinery.

The explosion proof contact block conforms to EN60079-0 and EN60079-1 for Zones 1, 2, 21, 22 environments (Gas and Dust). Adheres to the latest standard ISO13850.

The system works on the principle of releasing factory coded mechanical keys in a pre-determined sequence to ensure machine power is isolated before any access can be gained to hazardous or dangerous machinery.

After the machine control has been isolated (first key turned in the system) the key from the isolator can then be used to release other trapped keys to enable access to the guarded areas. After release of the first key (power isolation) safeguarding can be achieved without the need for electrical wiring, this makes the system ideal for use in harsh environments.

ATEX Limit Switch – ATEX Trapped Key