B&B Electronics 485OPDR-HS User Manual

Product Overview

2

Wiring Example

Terminal Block

Connectors

A – F

DIP Switches

1 – 8

1

Connections

Terminal
Block

Signal

A OUT (+)

B OUT (-)

Signal

C

Ground

Power

D

Ground

E IN (+)

F IN (-)

A-F Side

Terminal Block
Connectors
G – M

DIP Switches

1 – 8

2-Wire RS-485 System

TD/RD(A)-

.

.

TD/RD(B)+

H In ­G In +

L Out -

K Out +

J

M IGND1

Cable is 2 twisted pairs
+ shield (not shown)

485OPDR-HS

10-30
VDC

Out - B
Out + A
In - F
In + E

GND D

IGND2 C

.

.

GND/REF

POWER
SUPPLY

-V NC +V

3

L N

DIP Switches

AC Power lines
or AC outlet
using plug

Signal
Ground

Set DIP switches for RS-422, 2-Wire RS-485
or 4-Wire RS-485. The sample settings shown
below are for 2-Wire RS-485 half duplex

operation.

Switches 1, 2, 3, 4, 5 = ON
Switch 6 = OFF
Switches 7, 8 = Not Used

Attention: Please follow proper ESD
protection procedures when configuring
this device.

G IN (+)

H IN (-)

+10 to 30

J

K OUT (+)

L OUT (-)

M

VDC

Signal
Ground

G-M Side

Echo
Off

Echo
On

2W 2W

4W 4W

RS-485

Switch 1 2 3 4 5 6 7 8

Position

ON ON ON ON ON ON *** ***

OFF OFF OFF OFF OFF OFF *** ***

RS-422

Bias
IN

Bias
OUT

IN

Term
OUT

Used

Not
Used

Not

Term

Not
Used

Not
Used

Troubleshooting

Q. What are the factory presets?
A. “2-Wire” RS-485 half duplex operation; echo off, bias in,
termination out.
Switches 1, 2, 3, 4, 5 = ON
Switche 6 = OFF.
Switches 7, 8 = Not used.

Q. I want to use “4-Wire” RS-485 but the “4-Wire” RS485
devices do not respond with data.
A. When this unit is used to talk to a “4-Wire” device that
does not have biasing across the RS-485 receiver lines it may
be necessary to set the Transmitter to RS-422 Transmit mode:
Switch 1 = OFF.

This setting can be used providing that the master is on the
opposite side of the repeater. No other 4-Wire device can
be connected to the transmit lines on the side set for RS-422
transmit. The 485OPDRI has switches to enable separate
Transmit bias & Receive bias.

Biasing

Bias is provided by 4.7kΩ pull-up/down
resistors on the Data In lines. This value
is adequate for most applications without
termination.

Recommended Accessories

DIN rail mount
power supply
MDR-20-24

http://www.bb-elec.com/Products/Power­Supplies-Accessories/DIN-Power-Supplies/
Industrial-Slimline-Power-Supplies.aspx

Dataline Surge
Suppressor
HESP4DR

http://www.bb-elec.com/Products/Serial­Connectivity/Surge-Protection/Heavy-Duty­Surge- Protectors.aspx

Fast Easy Answers...

You can use your
smart phone to access
complete documentation
on our website. Simply
scan code to the right.

485OPDR-HS

High Speed, Isolated

RS-422/485 Repeater

Q

S

tart

G

uide

uick

Document number – pn9830_R1_485OPDR-HS_3213qsg

1-888-948-2248 | Europe: [phone]

www.bb-elec.com

707 Dayton Road | PO Box 1040 | Ottawa, IL 61350

Phone: [phone] | Fax: [phone]
www.bb-elec.com | E-mail: [e-mail]

© 2011 B&B Electronics Manufac turing Compa ny

First Things First...

Before you begin, be sure you have
the following:

485OPDR-HS

Additional items required but not included:

Power Supply (10 to 30 VDC, 0.7 W)

RS-422/485 Cable

Fast and easy on the web:

www.bb-elec.com