Thank you Ken. This is a dedicated module, manufactured by an old company called "New Technology Inc", (I donot know if it changed name or no longer exists). everything I know about the HSD, is that this module can be programmed to work on multiple machines for steel or aluminum cans like: Bodymakers; Cuppers, Printers, Internal Coater aplication. I think, I can to read resolver signs with this module on PLC5. I'll post a picture of the module as soon as possible.