Several folks have asked me for the list of Somfy parts I ended up using. Here is the list with updated part numbers (because Somfy has made it even more confusing!):
[x2] Somfy Sonesse (ST) ILT2 504S2 Motor (110V AC) Round Head Motor #1030077 (#1030053 for star head version)
Note: you don't need the limit setting tool if you use the 4ILT interface.
Note: make sure you get the ILT2 version of the motor (see 4ILT data sheet)
Note: I used the round rather than star head because of the lower profile end allowed it to mount closer to the screen frame
Note: this can be programmed for 8 different stop positions per motor. Two of these positions can be triggered by contact closure; all can be retrieved via IR or RS485.
[x1] Somfy RS485 4ILT interface #1870130. Check out this page
for more information.
[x1] Somfy IR Sensor #9154205
[x1] Somfy IR transmitter- IRT803 #1870132
Hardware for motor attachment
[x2] 2" roller blind tube #1781148 (or equivalent)
[x2] Somfy LT50 Idler End10 MM #9420800
[x2] Somfy LT50 Idler End Bracket 10mm #9410635
[x2] Somfy LT50 2" Soft Clip Drive #9206089
Pop rivet gun to attach soft clip drive to tube
RS232 to RS485 convertor to control 4ILT interface from a computer or A/V equipment (assuming you don't want to use IR)
Hope this helps.