fail-secure
English edit
Adjective edit
fail-secure (not comparable)
- Of a device: such that, if it fails, it does so in a way that will cause little or no harm to other devices and personnel.
Usage notes edit
The primary use of the term is with regards to security doors and motorized gates. A motor that has "fail-secure" capabilities will, in case of a power outage, be able to be opened by means of a supplied hand crank.