How can I switch the ML190 Series Electrified Mortise Lock between Fail Safe and Fail Secure modes?

[SanBrooke]

To modify the operational mode of your ML190 Series Electrified Mortise Lock between Fail Safe and Fail Secure, follow these instructions:

1. Remove the Faceplate: Begin by unscrewing the two Phillips head screws that secure the faceplate or armor front of the lock.
2. Locate the Switch: Inside the deadbolt cavity, you'll find the EU/EL Switch. This switch controls the lock's fail-safe or fail-secure behavior.
3. Adjust the Switch: To set your desired mode, position the EU/EL Switch accordingly. For Fail Secure (Electrically Locked), set the switch to "EU." For Fail Safe (Electrically Unlocked), select "EL." No power is needed to change the function at this stage.
4. Apply Power: The lock will adopt the new setting the next time it receives power. This power typically comes from your access control system.
5. Activate the Motor: Press and hold the momentary power button until you hear the motor engage (around 5 seconds).
6. Test the Functionality: Verify that the lock operates as expected in the selected mode.
7. Reassemble: Reattach the faceplate or armor front using the two Phillips head screws to complete the process. By following these steps, you can easily configure your ML190 Series Electrified Mortise Lock to meet your specific security requirements.