SF420 ir vienkāršs, bet labs biometriskais pieejas un darba laika kontroles termināls ar TCP/IP komunikācijas funkciju.

SF420 ir savietojams ar bezmaksas ZK Access 3.5 uzkaites programmu, kā arī ar citām T&A programmām. Var savietot ar RS485 lasītājiem. Ir arī analogā ieeja, lai iekārtu varētu savietot ar kādu citu iekārtu (piemēram dūmu detektoru vai kustību sensoru) tādejādi nodrošinot papildus funkcijas.

It is connectible with ZKAccess 3.5 software for access control and time attendance management.With Wiegand output, SF420 is flexible to connect with ZK or any 3rd party controllers as a slave reader. Wiegand input configures two SF420 units to utilize Master & Slave solution to enable users verification at both entrance and exit. Anti-passback function is also enabled to maximize the security level.Auxiliary input interface allows SF420 to connect with an extra source, for instance, a smoke detector or emergency switch. Once the linkage function is enabled through the machine menu, the device generates an alarm signal and opens doors in case of emergency.