The SDC EntryCheck™ 918 Series are indoor stand alone digital keypads designed to control access of a single entry point for facilities with up to 500 users. Each user is assigned a personal identification number (PIN). Keypad entry of a valid one to six digit code activates one or both of the output relays which releases an electric door lock. The SDC EntryCheck™ 918W is designed to interface with most access control systems and provides a standard 26-bit Wiegand output.