Industrial safety specialist Fortress
Interlocks has integrated a key
switch function into key exchange
units, making it possible to isolate the
power and release access keys in one
operation.

The XMR unit simplifies the
traditional interlock procedures for
safeguarding potentially dangerous
machines and areas with multiple
access doors. By simply turning the
first key of the XMR the safety
contacts are broken, isolating the
machine power. This key is then
trapped and the other access keys can
be used to open the door locks
allowing access to the safeguarded
areas. Only when all keys are returned
to the XMR can the machine be
restarted. This means separate key
transfer between an (isolation) key
switch and key exchange unit is no
longer needed, providing a simplified
and cost efficient solution for lots of
safeguarding applications.