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.

14

DB-9 Male connector

The table below shows the RS-485 (full duplex) pinout 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

Note: Other pins have no function in this mode and should be left un-connected.

Table 10

RS-485 full duplex pin-out for DB-9 connector

5-way Terminal Block

The table below shows the RS-485 (full duplex) pinout 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 11

RS-485 full duplex pin-out for terminal block