Yes, should be possible; we used 1100 RID on a 1050 system routinely until the pointy-haired boss decided 1050s were "too old" and got rid of them, so I had to connect that detector to Open Lab system every time I needed to use it...
I'm retired now, so working off memory. I think the 1100 DAD module must be connected to the system with GPIB, not LAN, and you'd need the 9-pin remote connector cable. You'd need to set up using Configuration Editor and the correct "code/address" for the 1100 module, then start up ChemStation. And of course you'd need to add the DAD module to the ChemStation software, with its 10-character license number.
What Windows and what Chemstation are you using?