Life-safety openings often need fail safe. Stair towers and some exterior doors use fail secure.
Pick the mode the opening and code require, then match the Transmitter Solutions lock.
Door HardwareReviewed 2026-08-28
Fail safe vs secure
Fail safe unlocks on power loss. Fail secure stays locked on power loss.
Also called
fail safe lockfail secure strikepower loss behaviorFail safe vs fail securefail safe vs fail secure
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Lock Type
Source: Transmitter Solutions product training