DataI/O is the lousy about supporting the older equipment. I have a model 29 and a 2B module. I do have instructions for the 29 but not for the module. The 29 can be programmed from a computer by simple data transfer via Rs-232. Or you can use the keypad to enter all the data or to modify the data. BUT you need the instructions for the module since they include the code numbers used to identify the various EPROMS to the programmer. Without those codes the programmer is useless.