Bb-electronics 485LDRC9 - Quick Start Guide User Manual download pdf

Set The 422/485 Side of Converter

Connect Your RS232 Device

(Terminal Block OR DB9 Port)

Computer

Termination Switch: Set to OFF (Recommended)

Switch 5

If you want to enable termination,

refer to: http://www.bb-elec.com/

485LDRC9

Set the Dipswitch Settings for Baud Rate

For baud rates not listed above refer to:

http://www.bb-elec.com/485LDRC9

Additional tech notes on RS232 DTE DCE connections

are located at: http://www.bb-elec.com/tech/DTE-DCE

Loopback Test (Optional)

To verify serial port and 485LDRC9 functionality

• Congure for RS-485 four wire,

9600 baud.

• Jumper terminals H to L and G to K.

• Connect a PC to the RS-232 port

(see Step 1).

• Using HyperTerminal or similar program,

connect to the appropriate COM port

(remember to set the baud rate at 9600).

Turn off HyperTerminal local echo.

• Start typing. If you can see the data

you are typing, you have a good loop-

back. If you cannot, contact tech support.

• LED Indicators: Power is ON when power

is applied. TD ﬂashes when RS-422/485

data is sent. RD ﬂashes when RS-422/485

data is received.

Set DIP

Switches to:

Your Device485LDRC9

• Use a straight through DB9 to DB9 if you are

connecting to a computer (DTE).

• Use a cross over (null modem) DB9 to DB9

if you are not connecting to a computer. (DCE)

Additional tech notes on 422/485 are located at:

http://www.bb-elec.com/485LDRC9

Product Overview

Terminal Block

Connectors

A – F

Terminal Block

Connectors

G – M

DB9 F PINS

DIP Switches

1 – 8

Top View

(232 and Power Side)

Bottom View

(422/485 Side)

Connect Your Power Supply

External Power

Supply

Terminal C:

(Ground/V (–)

Terminal F:

V (+)

Field Device

Your Device485LDRC9

Please Note:

Terminal block and DIP switch settings located on product.

2 Wire 485 4 Wire 485/422

Your Device Your Device485LDRC9 485LDRC9

DTE DCE

Converter uses 0.5 W

RS-485 4-Wire

DATA

B (+)

DATA

A (-)

GND

TDB (+)

TDA (-)

RDB (+)

RDA (-)

GND

OFF

SW-1 SW-2 SW-3 SW-4

RS-485 2-Wire Half Duplex

ON ON ON ON

RS-485 4-Wire Full Duplex

ON OFF OFF OFF

RS-422 Full Duplex

OFF OFF OFF OFF

SW-6 SW-7 SW-8 Timeout (MS)

2400

OFF OFF ON 4.16

4800

OFF ON OFF 2.08

9600

ON OFF OFF 1.04

19.2K

ON ON ON 0.580

Use the 120Ω

Built-in Termination

Use External or

No Termination

OFF

1 2 3

Product Overview 1
485LDRC9 2

Summary of Contents

Page 1 - Product Overview

Set The 422/485 Side of ConverterConnect Your RS232 Device (Terminal Block OR DB9 Port)ComputerTermination Switch: Set to OFF (Recommended)Switch 5If

Page 2 - 485LDRC9

TroubleshootingFast, Easy AnswersTiming Issues? (Usually applies when using 2-wire 485)The 485LDRC9 uses RC time constant. This means that when you ar

Page 3

UL Installation InformationUnderwriters Laboratories Conditions of Acceptability – When installed in the end-use equipment, consideration should be

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Bb-electronics 485LDRC9 - Quick Start Guide User Manual

Browse online or download User Manual for Accessories communication Bb-electronics 485LDRC9 - Quick Start Guide. B&amp;B Electronics 485LDRC9 - Quick Start Guide User Manual

Summary of Contents

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Browse online or download User Manual for Accessories communication Bb-electronics 485LDRC9 - Quick Start Guide. B&B Electronics 485LDRC9 - Quick Start Guide User Manual