When used in conjunction with a IR1051 series card reader the MSLR1 controls a single door through a single reader input. Allows any magnetically encoded card programmed with a Start Sentinel (SS, BH) in the first position access into the vestibule. A potentiometer located on the MSLR1 control board may be adjusted to select the number of seconds the door will be unlocked after a valid card is swiped. Meets all Government and Banking Industry security requirements for ATM vestibule access control. MSLR1 can be installed to operate in all sorts of weather conditions. Manufactured to meet rigorous specifications for trouble free service. The MSLR1 system does not require additional computers or software.