16 • Schlage • WRI400 user guide
Power failure modes
The installer may configure the strike and/or auxiliary relay status (with SUS on the HHD) for
the possible event of power failure.
The default power failure mode is
fail secure
(locked).
To maximize security, a valid credential must be presented before any change to the
strike relay can take effect.
• For the system to
fail secure
, the secure mechanism must be tied to the normally
closed side.
• For
fail secure
, UL listed panic hardware must be used to allow emergency exit from
the protected area.
• To
fail safe
(unlocked), the secure mechanism must be tied to the normally open side
and the SUS must also be configured to enable
fail safe
mode. Strike and auxiliary
relays need not be configured the same.
• Third party locking devices must have some form of uninterruptible power supply for the
WRI400 to control their power failure mode.
