Mechanical Limits Motors A basic workhorse motor used predominantly for roller shutters and occasional automation use. Also compatible with many lift system designs. WSS40 5/28 Universal – for internal roller blinds WSS50S 10/17 short motor – narrow roller shutters WSS50GREY 20/17 – economy roller shutter motor WSS50 30/17 Universal – roller shutters & awnings WSS50 50/13 Universal – roller shutters & awnings WSEB60 80/12 – heavy duty roller shutters WSEB60 120/9 – heavy duty roller shutters WSME50 30/17 M/Override – roller shutters & awnings WSME50 50/13 M/Override – roller shutters & awnings WSME60 80/12 M/Override – roller shutters & awnings WSME60 140/9 M/Override – roller shutters & awnings WSM50 30/17 M/Override – roller shutters & awnings WSM50 50/13 M/Override – roller shutters & awnings WSM60 80/12 M/Override – roller shutters & awnings WSM60 120/9 M/Override – roller shutters & awnings WSM60 140/9 M/Override – roller shutters & awnings