I am trying to link 3 pieces of assembly equipment to one PC to make it easier for the maintenance technicians to troubleshoot a problem rather than connecting to indvidual robots using a PIC driver. I am using one "1" PC and using three "3" SLC 500 DH-485 LINK COUPLERS to do this. I believe I need to "daisy chain" link these together but I don't know where to start. I need information on what cables and other things I would need to set this up. I would just buy a module for this but I am trying to save money and use what I already have . Any information about DH-485 and specifcally concerning my issue would be greatly appreciated.