Escape, Emergency and Auxiliary Release

When using interlocks with guard locking a risk assessment may show that the guard locking function needs to be overridden, known as a “supplementary release of guard locking”. There are three ways of overriding guard locking, escape release, emergency release and auxiliary release. Each is used for three different reasons and they have different requirements, they all must initiate a stop command on opening the guard. These supplementary release methods are defined in even more detail in ISO 14119:2013.




Escape Release

A reactive inhibit function allows a person to escape if they become trapped inside a safeguarded space. It can only be actuated from inside the area and generates a stop command. Escape release must be manually operated and act directly on the principle of the locking mechanism.


Emergency Release

Allows entry into the safeguarded space in an emergency, for example in a medical emergency or fire. Manually operated from outside the safeguarded space and must generate a stop command.

NB. Emergency release may create further risks due to allowing entry during run down time. A risk assessment is essential to determine if escape release is practicable.


Auxiliary Release

Some tasks such as maintenance and teaching require operators to run the machine with a guard open. An auxiliary release overrides the guard locking function using a special tool or key. Take care to ensure only trained and authorized personnel have access to this tool. Alternative risk reduction measures should be used alongside an auxiliary release, such as enabling devices or two hand controls.


Fortress has options for escape release, emergency release and auxiliary release available across our ranges. Contact us to discuss your specific application.