The device has six digital inputs which all share a common reference pin. The inputs are intended for general-purpose digital I/O interfacing.
Note: Digital inputs are designed for reading the status of the feeder (open, traveling, closed) and not for detecting short-duration changes.
The inputs are optically isolated and work with voltage (bipolar) levels from 5 to 60 V. This range is guaranteed to be interpreted as a logical high state. Voltage levels less than 1.65 V are interpreted as a logical low state.