When adding units to a new project there are 2 options for each Occupancy Sensor model i.e. 5750WPL (SENPIRSS or SENPIROA), 5751L (SENPIRSS or SENPIRIA), and 5753L (SENPIRSS or SENPIRIB). Question. If you pick the model with SENPIRSS as it's unit type why doesn't the network recognise and match up with the database unit? The only way to match units is to match serial numbers and manually input the Group Addresses and Part Name because you get an error message that unit types are different and cannot transfer database programming.