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.

12

DB-9 Male connector

The table below shows the RS-485 (half duplex) pinout of the DB-9 male connector.

Pin Number

Description

1

Data– = Transmit / Receive Data, negative polarity

2

Data+ = Transmit / Receive Data, positive polarity

5

GND = Signal ground

Note: Other pins have no function in this mode and should be left unconnected.

Table 8

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

5-way Terminal Block

The table below shows the RS-485 (half duplex) pinout of the 5 way terminal block.

Pin Number

Description

1

Data– = Transmit / Receive Data, negative polarity

2

Data+ = Transmit / Receive Data, positive polarity

5

GND = Signal ground

Note: Other terminals have no function in this mode and should be left unconnected.

Table 9

RS-485 half-duplex pin-out for 5-way terminal block