Rs-485 Do I need a rs-485 port on 45xp to connect to a langmuir

Do I need a rs-485 port on 45xp to connect to a langmuir table

No you dont need one, if you have it already you should be able to use it. The CPC port is the less expensive option of the two, or just wire it directly. Are you looking at the PRO w/ THC or a non THC table?