Fuji Electric ZPB Insruction Manual page 26

(5) Communication: RS-485 connector
< RS-485 connector >
5 1
9 6
D-sub 9-pin female
3.6 Timing of contact output for calibration
1) Manual calibration (See "Section 6.8 Calibration".)
(GND)
1
6
RT D+
2
7
RT D-
3
8
4
9
5
16
INZ-TN2ZPB-E