Digital input card for a computer has multiple input channels and an evaluation unit, such as an analogue to digital converter that allows a user to set voltage thresholds individually for each channel

摘要

Digital input card for a computer has a number of input channels to which an input signal is applied and an evaluation unit that assigns input signals with a voltage above a threshold value a value of 1, while those below the threshold are assigned a 0 value. The threshold vale is variable and can be set or changed by a user. The user can set the threshold voltage value for each input channel.