Fortress mGard Mechanical Trapped Key Interlocks Overview
Fortress mGard is a configurable family of mechanical trapped-key interlocks for enforcing a defined access and equipment-state sequence, using selected locks, key exchange and associated isolation or control arrangements in a complete machine architecture.
Key Specifications
Product detail | Specification |
Manufacturer | Fortress Safety |
Model | Fortress mGard Mechanical Trapped Key Interlocks |
Product identity | Fortress mGard mechanical trapped-key range, distinct from amGardpro guard-switch products |
System elements | Selected access, bolt, key-exchange and isolation/control arrangements as specified |
Sequence | Key retention and release enforce the engineered process sequence |
Protective qualification | Manufacturer identifies suitability up to PL e/Category 4 or SIL3 within applicable product and architecture scope |
Environmental selection | Materials, mounting and environmental options depend on the full component references |
Procurement | Complete key schedule, lock functions, interfaces and validation evidence must be defined |
Review Summary

mGard is useful when a documented mechanical key sequence fits the required access and hazardous-energy design. Select and validate the complete arrangement, including personnel-access requirements where applicable; a certified component family does not automatically validate the machine or replace its approved isolation procedure.
Price and Availability
Request a quote for the selected configuration and delivery schedule. Any published reference price applies only to its stated configuration and is not a store checkout price.




