Share on (60725020583):
There are two versions of NeoDen4, with rails and without rails. The main difference between these two models is fixation method.
The without rails version will use magnetic pins and bars to fix board, the with rails version could use auto rails to advance board automatically.
The maximum PCB size of with rails version is 310*1,500mm, without rails version is and 310*400mm.
The advantage for with rails version is it could help to handle 1.2m/1.5m long board and connect with a conveyor to achieve a continuous SMT line, if you board is not that long, both versions will be workable.