EL/EU means what

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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 both levers (inside and outside cylinder with deadbolt) - Both knobs/levers continuously locked (EL) or unlocked (EU) by 12 or 24V DC. EL is fail safe (power fail...
Electrically locking and unlocking both levers (no cylinder) - Both knobs/levers continuously locked (EL) or unlocked (EU) by 12 or 24V DC. EL is fail safe (power failure allows outside knob/lever ...
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.