whatdoes EL and EU stand for?

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Procedure for the L9090EL/EU, L9091EL/EU, L9092EL/EU, L9093EL/EU, L9094EL/EU, L9095EL/EUThese devices have a selectable switch in the upper right corner of chassis.  Simply move the switch to ...
Procedure for the L9080EL/EU and L9082EL/EUTo modify an electrified L9000 from EU to EL or EL to EU move the link pin to the appropriate location indicated below in Figure 1.  
The ND electrified motor driven locks shipping as of  March 14, 2016 has a field selectable operating mode, you can convert from EL to EU or EU to EL by flipping a switch on the chas...
The electrified ND electrified solenoid driven lock shipped prior to March 14, 2016 can be converted between fail safe (EL) and fail secure (EU) by swapping out the solenoid, sleeve,...
EL: Electrically Locked (Fail Safe), locks when power is supplied and is unlocked when there is no power. EU: Electrically Unlocked (Fail Secure), unlocks when power is supplied and is locked when...
Electrically locking and unlocking outside lever (outside cylinder, inside thumbturn with deadbolt) - Outside knob/lever continuously locked (EL) or unlocked (EU) by 12 or 24V DC. EL is fail safe (...
Electrically locking and unlocking outside lever (inside and outside cylinder with deadbolt) - Outside lever continuously locked (EL) or unlocked (EU) by 12 or 24V DC. EL is fail safe (power failur...