Shuttle offers a wide range of optional accessory products for its BPCWL02 und BPCAL02 box PCs. The box PC already has a permanently installed RS232-COM port on the rear. With the Shuttle Accessory CSD01 an additional COM port (RS232/422/485) can be installed on the front. In addition, you can install another COM port (RS232) with the Shuttle Accessory CRS01. Compatibility