Document Reference No.: ES_000086

ES-R-2x01B-M RS-232 to RS-422/RS-485 Converters Manual

Version 1.0

Clearance No.: ES

©2010 - 2011 EasySYNC Ltd.

10

DB-9 Male connector

The table below shows the RS-422 pin-out of the DB-9 Male connector.

Pin Number

Description

1

TxD- = Transmit data, negative polarity

2

TxD+ = Transmit data, positive polarity

3

RxD+ = Receive data, positive polarity

4

RxD- = Receive data, negative polarity

5

GND = Signal ground

6

RTS- = Request to send, negative polarity

7

RTS+ = Request to send, positive polarity

8

CTS+ = Clear to send , positive polarity

9

CTS- = Clear to send, negative polarity

Table 6

RS-422 Pin-Out for DB-9 connector

5-way Terminal Block

The table below shows the RS-422 pin-out of the 5-way terminal block.

Pin Number

Description

1

TxD- = Transmit data, negative polarity

2

TxD+ = Transmit data, positive polarity

3

RxD+ = Receive data, positive polarity

4

RxD- = Receive data, negative polarity

5

GND = Signal ground

Table 7

RS-422 Pin-Out for 5-way terminal block