Operating modes and functions Operating Manual
8 Solenoid Drop Bolt with manual Key Override WN 60425 45532/16458 - 08/2022
4 Operating modes and functions
4.1 Overview of functions
The DB25K is a magnetically operated deadbolt lock for single-closing doors. The
intelligent electronics provide a range of functions:
Features
• Multi-voltage input (DC 12 V/24 V)
• Multiple locking/unlocking attempts
• Timed relocking
• Optimized energy consumption (standby)
• Monitoring of door position and bolt position
• High mechanical strength
Profile cylinder
The DB25K allows the inclusion of a profile cylinder. The profile cylinder allows the
lock to be closed manually with the use of a key. The electronic access control is
thus bypassed. Depending on the variant (fail-safe or fail-secure) and the
connection type, the deadbolt is moved electrically or mechanically during manual
closing.
Permanent unlocking
The lock opens when triggered at the control input. If the control signal is
permanently present, the lock remains unlocked for the duration of the control
signal.
Short-term unlocking
If the control signal is present only briefly, the lock unlocks only briefly. If the door
is not opened, the lock locks again after an adjustable time has elapsed (typically 9
seconds). This ensures that a door does not remain unsecured if it has been
unlocked but not opened. The time is configured during commissioning (0, 3, 6 or 9
seconds).
The functions of the two variants normally open (fail-safe) and normally closed
(fail-secure) are explained by two examples. Both have the closed and locked door
as their initial state.
Function of the fail-safe variant (currentless opening)
• Brief activation of the control input unlocks the door for 9 seconds
(adjustable).
• If the door has not been opened, the lock automatically locks again.
• If the door has been opened, the lock remains unlocked until the door is closed.
When the door is closed, the relocking time is started.
• After the door is closed and the relocking time has elapsed, the lock operates
the bolt 9× within 15 seconds at full power.
Function Variant Fail-secure (de-energized closing)
• Brief activation of the control input unlocks the door.
• Within the next 9 seconds, the lock operates the bolt 5× within 9 seconds with
full power.
• If the door has not been opened, the lock locks again within 9 seconds.
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