hi everyone! i'm new member of forum, i'm start research equipment of schneider electronic. i have problem with communicate between premium and another equipment, because i must use Modbus to communicate pass card TSXSCP114. i don't know to add wire from Card to 3 wire (common, DA,DB). I enclose a file guide that I follow but still error. in this picture,is connect from pin 2 to pin 9,pin 1 to pin 10 ? what must i get 3 wire data from pins? who have experience about this please help me. thank you very much! p/s: my english is low level, please reply clearly.