Please use terminating resistors and Profibus connectors as shown in the DP-master FX2N-32DP-IF PDF manual
and Profibus connector manual
Mitsubishi FX2N-32DP-IF Manual FX2N-32DP-IF Manual FX2N-32DP-IF PDF.
Mitsubishi FX2N-32DP-IF FX2N-32DP-IF PDF Manual PDF.
Profibus-DP Interface
FX2N-32DP-IF FX2N-32DP-IF Manual FX2N-32DP-IF PDF Unit Mitsubishi FX2N-32DP-IF User's Manual PDF.
Mittsubishi FX2N-32DP-IF Manual FX2N-32DP-IF Hardware Manual FX3U-32DP Manual PDF.
Profibus-DPP FX2N-32DP-IF PDF Interface Unit Mitsubishi FX2N-32DP-IF User's Manual PDF.