You can connect a ±30 V tachometer input signal to pin 1 of the Digital Function header of the DT7816 module. In software, you can read tachometer measurements as part of the input stream. Refer to the DT7816 User's Manual for more information on the tachometer input features.
The following figure shows how to connect a tachometer to the Digital Function header on
the DT7816 module; you can access this signal using the Digital Function
connector of the STP781x
screw terminal panel: