Can Mortise Locks Function be changed in the field?

Are you able to change Mortise Locks from Fail Safe to Fail Secure or vice versa in the field?

Yes. All motorized lever control locks can be easily changed between Fail Safe and Fail Secure by flipping the EU/EL switch in the chassis.  Additionally, the solenoid versions of ML80 and ML180 can be changed between Fail Safe and Faile Secure by removing the chassis cover and moving the locking pin.  Please see the model instructions for the specific process.