SENA Parani-SD1100 - Manual (Page 33)

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Appendix A: Connections
A.1. Serial Port Pin Outs
Parani-SD is compatible with the RS422/485 standard, a DB9 Male interface.
Figure A-1 Pin layout of the DB-9 male connector
Table A-1. Pin assignment of the DB-9 male connector
Pin # Signal Direction Description
1 VCC Input Power Supply 5V~12V
2 - - -
3 RXD-
TRXD-
Input
In/Output
RS422 Received Data Negative
RS485 TX/RX Data Negative
4 TXD+ Output RS422 Transmit Data Positive
5 GND - Signal Ground
6 VCC Input Power Supply 5V~12V
7 RXD+
TRXD+
Input
In/Output
RS422 Received Data Positive
RS485 TX/RX Data Positive
8 TXD- Output RS422 Transmit Data Negative
9 GND - Signal Ground