B&B Electronics 485ABOIC Manuale utente

Documentation Number 485ABOIC1702 – pg. 1/2

This product designed and manufactured in USA of domestic and imported parts by

Optically Isolated RS-485 to RS-485 PLC Converter

Connects to your PLC network safely

Model 485ABOIC

Description

Make quick and easy connections to your Allen Bradley® PLC® models SLC™ 500, 5/01, 5/02, & 5/03™

using B&B Electronic’s model 485ABOIC. The unit optically isolates balanced half-duplex RS-485 signals to

balanced half-duplex RS-485 signals, comparable to the converter provided by Allen Bradley. The 485ABOIC is

housed in a compact enclosure ready to be mounted on a DIN rail or panel.

Optical isolation adds security against conventional problems like ground loops, spikes, and surges that may

be present on data and control lines. No power supply is required as the module draws power from the PLC

connection. If needed, there is a 3-position screw terminal block for an external supply. An LED indicates power.

An included two-foot cable connects easily from the PLC to the unit using the 8-pin SDL Amp connector. The

6-position terminal block provides the RS-485 backbone link to the network. By using B&B’s model 232ABRJ45

(not included) handheld devices or PC/laptops can be connected to the RS-485 network through the RJ45 port.

The RJ45 jack can also be used for daisy chaining to another unit.

Features

•Straight forward easy connections

•Compact enclosure

•DIN mountable

•Panel mountable

•Provides 2000 VAC isolation

•Two-foot cable included for connections to the PLC

•Two power method - directly from PLC or external (not

included)

•Power status LED for quick reference

Connections

Power can be brought in through the optional external screw barrier strip as marked on the enclosure. The

RS-485 backbone network link is made through the removable terminal block with pin descriptions marked on the

enclosure. The PLC connection is made through the 8-pin Amp connector using the provided cable (male 8-pin

Amp to male RJ45). Table 1 shows the pin outs of the Amp connector. The RJ45 jack is designed for jumping to

another unit using a straight through RJ45 cable. It can also be used with B&B’s model 232ABRJ45 (not included)

to interface to a handheld device or PC/laptop. Table 2 shows the pin outs of the RJ45 jack.

Table1–8PositionAmpPinOuts Table2–RJ45PinOuts

Signal Pin Number Direction

DATA + 1 Bidirectional

DATA - 2 Bidirectional

24VDC IN 3 Input

GND 4 Bidirectional

TX EN 5 Input

NC 6 N/A

GND 7 Bidirectional

24VDC OUT 8 Output

Signal Pin Number Direction

DATA + 1 Bidirectional

DATA - 2 Bidirectional

NC 3 N/A

GND 4 Bidirectional

TX EN 5 Input

NC 6 N/A

GND 7 Bidirectional

24VDC OUT 8 Output

Documentation Number 485ABOIC1702 – pg. 2/2

This product designed and manufactured in USA of domestic and imported parts by

RS-232

PLC

MODEL 232ABRJ45

DB25

DB9

RJ45

SLC 5/00, 5/01, 5/02, & 5/03

RJ45

8PINAMP

ALLEN BRADLEY PLC

RS-485 NETWORK LINK

B&B

electronics

MANUFACTURING COMPANY

www.bb-elec.com Ottawa, IL 61350 USA

MODEL 485ABOIC

OPTICALLY ISOLATED

RS-485 TO RS-485

PLC CONVERTER

24VDC

DC NEUT

CHS GND

RS-485 LINK

PERIPHERAL

PLC

DIN OR PANEL

MOUNTABLE

IMPORTANT

Always connect CHS GND to the nearest ground.

This connection must be made whether or not

an external 24 VDC supply is used.

NOTE 1

In normal operation with the PLC connected to the unit, both the unit

and the interface converter (like model 232ABRJ45, if connected) are

NOTE 2

If no PLC is connected to the unit, then a 24 VDC power supply

should be used to supply power to this unit and the interface

converter (if connected).

NOTE 3

One and only one of the unit at the end of the network link must have

terminals 1 and 2 of the removable terminal block jumpered together.

NOTE 4

Units on both end of the network must have terminals 5 and 6 of the

removable terminal block jumpered together.

B&B

electronics

MANUFACTURING COMPANY

www.bb-elec.com Ottawa, IL 61350 USA

Figure 1 - Setup and Installation

™

CHASSIS GROUND 1

SHIELD 2

SIGNAL GROUND 3

DATA 4

DATA B 5

TERMINATION 6

RS-485 LINK

Warning

CONNECT CHS GND TO

THE NEAREST GROUND.

AMISWIREDPOWER

SOURCE WILL RESULT

IN PERMANENT DAMAGE

TO THE CIRCUITRY.

Specification Summary

PLC Allen Bradley SLC 5/00, 5/01, 5/02, & 5/03™

RS-485 Backbone 6-position removable terminal block

RS-485 Peripherals RJ45 female jack

PLC 8-pin Amp connector

Speed 38.4K baud max.

LED 1 red LED for power status

Isolation 2000 VAC

Power Requirement 24 VDC @ 25 mA max (does not include power consume by peripheral connection)

PLC powered using included cable or externally powered (not included)

Approval FCC Class A

Temperature 0to70°C (32 to 158°F)

Dimensions 4.5x3.5x1.3in(11.4x8.9x3.2cm)

Allen Bradley, PLC, and SLC are trademarks owned by Rockwell Automation and its various subsidiaries.

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