I think if you need individual car call security control you have to add a UIO and maybe software. But if you can lock all secured floors with a single input you should be able to set BSI Security Key to enabled, program a security code to the floor or floors you want to lock in the F3 menu, then use spare input BSI to toggle security on/off. But please someone let me know if there’s an easier way, especially to add card reader security without getting new software.