3 rs485-1 line reception, rs485-2 line repetition, 4 rs485 tx/rx line, 6 serial terminations/connections – Videotec ULISSE PLUS User Manual
Page 25: Y units ( "7.4.5.3 rs485-1, Line reception, rs485-2 line repetition, Tion on rs485-1 line ( "7.4.5.4
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