ADAM-5081 is a 4-Channel High Speed Counter/Frequency Module, users can select either counter or frequency mode for data input. This high speed module can support a high input frequency from 5Hz to 1MHz. And it provide a noise filter function 1~65000μsec. ADAM-5081 offers users flexible and versatile applications such as counter, frequency, alarm setting, Up / Down, Up, A/B phase or Bi-direction Functions.