The CDI 169 is a C-DIAS input module with 16 independent digital inputs. These can be used as a normal sink "open collector" input, as well as an "open collector" event counter and for flow measurement (counter frequency up to 1 kHz).
The inputs are individually configurable as a normal sink input, an event counter and interrupt source.
In the counter mode, it is possible to select the operation mode for each counter separately: forward, backward, rising flanks, falling flanks or both rising and falling flanks. In the corresponding mode, a counter is able to reset another counter. The 8-bit counter can be used as an up or down counter and is expanded to a 32-bit counter in the process image.