Mega-system-tech RS485 Manual de usuario descargar pdf (Pagina 6)

NET101 User’s Manual -4-

Chapter 1: Introduction

Section 5. NET101 DB-9 Pin Assignment

Fig.4 DB-9 Male

NET101 DB-9 PIN Assignment

DB-9 Pin No. RS-232 RS-422

RS-485

Full Duplex

RS-485

Half-Duplex

1

DCD RxD- RxD-

2

RxD RxD+ RxD+

3

TxD TxD+ TxD+ TxD+ / RxD+

4

DTR TxD- TxD- TxD- / RxD-

5

GND GND GND GND

6

DSR

7

RTS

8

CTS

9

RI

Fig.5 NET101 DB-9 PIN assignment

1 2 3 4 5 6 7 8 9 10 11 ... 28 29

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