ما الفرق بين +?DH-485 AND DH

DH+ and DH485 are Rockwell protocols. DH485 is used with low end SLC5's and relevant hardware, uses 6 core cable, uses a 19.2k baud rate with up to 32 nodes, maximum length of 4000ft and is token passing from memory. DH+ uses a 2 core shielded cable referred to a 'Blue Hose', baud rates of 57.6k, 115.2k (not common) and 230k, up to 64 nodes but that is not recommended, up to 10,000ft at 57.6k and is token passing. Requires end termination resistors . Both DH+ and DH485 require specialise connection modules for PC's