Allen-Bradley 1747-SN Manuale utente

Publication 1747-5.33

Remote I/O Scanner

Catalog Number 1747-SN

Installation Instructions

2Remote I/O Scanner

Publication 1747-5.33

Important User Information

Because of the variety of uses for the products described in this publication, those

responsible for the application and use of this control equipment must satisfy

themselves that all necessary steps have been taken to assure that each

application and use meets all performance and safety requirements, including any

applicable laws, regulations, codes and standards.

The illustrations, charts, sample programs and layout examples shown in this

guide are intended solely for purposes of example. Since there are many

variables and requirements associated with any particular installation, Allen-

Bradley does not assume responsibility or liability (to include intellectual

property liability) for actual use based upon the examples shown in this

publication.

Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application,

Installation, and Maintenance of Solid-State Control (available from your local

Allen-Bradley office), describes some important differences between solid-state

equipment and electromechanical devices that should be taken into consideration

when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or in part,

without written permission of Allen-Bradley Company, Inc., is prohibited.

Throughout this manual we use notes to make you aware of safety

considerations:

Attention statements help you to:

• identify a hazard

• avoid the hazard

• recognize the consequences

!ATTENTION: Identifies information about practices

or circumstances that can lead to personal injury or

death, property damage or economic loss.

Important: Identifies information that is critical for successful

application and understanding of the product.

Remote I/O Scanner 3

Publication 1747-5.33

For More Information

As part of our effort to preserve, protect, and improve our environment, Allen-

Bradley is reducing the amount of paper we use. Less paper means more options

for you. In addition to traditional printed publications and CD-ROM versions,

we now offer online materials with the most up-to-date information you can get.

We recommend that you read the related publications listed below before starting

up your control system.

Related Publications

How to Get More Information

For Refer to this Document Pub. No.

A more detailed description on how to

install, configure, and operate your

Remote I/O Scanner. Remote I/O Scanner

User Manual 1747-6.6

A more detailed description on how to

install and use your modular

SLC 500™ system SLC 500 Modular Hardware Style

Installation and Operation Manual 1747-6.2

A reference manual that contains

status file data and instruction set

information for SLC 500 processors.

SLC 500™ and MicroLogix™

1000 Instruction Set Reference

Manual 1747-6.15

For Obtain Information By

Fast access to related

publications

• Visiting the Automation Bookstore at

http://www.theautomationbookstore.com — Electronic versions of

our manuals are available for you to search and download.

• Calling (440) 646-5436 for the Allen-Bradley Fax Back service. You

will be faxed information on the topic you request.

Publicationsinprinted

format

Ordering a manual using one of the following methods:

• Filling out and returning the User Manual Request Card that was

shipped with the unit.

• Visiting the Automation Bookstore at

http://www.theautomationbookstore.com

Multiple copies of a

manual • Visiting the Automation Bookstore at

http://www.theautomationbookstore.com

4Remote I/O Scanner

Publication 1747-5.33

Overview

The Remote I/O (RIO) Scanner, 1747-SN, enables communication between an

SLC™ processor and remotely located 1746 I/O chassis and other RIO-

compatible Allen-Bradley operator interface and control devices. The 1747-SN

scanner communicates with remote devices using the A-B Remote I/O link. The

RIO link consists of a single master (scanner) and multiple slaves (adapters).

Communication between devices occurs over twisted-pair cable with the devices

daisy-chained together. Maximum distance for remote communication is

3,048 m (10,000 ft.). The scanner is compatible with any standard RIO adapter

device.

The SLC processor transfers a maximum of 4 logical racks (32 input and 32

output image words) of discrete remote I/O data into the SLC input and output

image files. You can adjust the size of the scanner image files during

configuration of your SLC system so that the scanner only transfers the discrete

I/O data required by your application program. The 1747-SN Series B or later

RIO Scanner can be configured to transfer up to 64 words of data to a remote

device via block transfer. Refer to publication 1747-6.6, Remote I/O Scanner

User Manual, for information on configuration, programming, and block

transfers.

The SLC 500™ processor (SLC 5/02™ or higher) supports multiple scanners in

its local I/O chassis. The maximum number is dependent on the following:

• backplane power requirements (power supply dependent)

• SLC 500 processor I/O data table limit (4,096 input and output bits)

• processor memory to support the application (SLC processor dependent)

RIO Scanner

(Master of the RIO Link)

SLC 5/02 or

later processor

1747-ASB Module

(Adapter/Slave)

Remote Chassis Remote

Expansion Chassis

Dataliner™Message Display

(Adapter/Slave) PanelView™Operator Terminal

(Adapter/Slave) RediPANEL™

(Adapter/Slave)

Local SLC Chassis

Remote I/O Scanner 5

Publication 1747-5.33

Hardware Features

The figure below shows the scanner’s features. RIO Link Connector, Status

LED, and DIP Switch information follows.

RIO Link Connector

This 3-pin male connector connects the scanner to the RIO link. The

Allen-Bradley repair part number is 1746-RT29.



SCANNER



Dip Switch CableTie Slots RIO Link Connector

Status

LEDs

SW1

Line 1

Shield

Line 2

OFF

57.6

115.2

230.4

OFF

1 2 KBAUD

CONNECT ONE END OF

CABLE SHIELDTO CHASSIS

MOUNTING BOLT. REFERTO

USERS MANUAL.

COMM FAULT

1747-SN

LISTED IND. CONT. EQ.

FOR HAZ. LOC. A196

OPERATING

TEMPERATURE

CODET3C

CLASS I, GROUPS A, B, C, AND D, DIV 2

SLC 500

Remote I/O Scanner

CAT

SERIAL NO. FAC

SER

HOST

FRN PLUG

FRN

MADE IN U.S.A.

CURRENT REQUIREMENT 600 mA @ 5VDC

6Remote I/O Scanner

Publication 1747-5.33

Status LEDs

The scanner has two LEDs, FAULT and COMM, which indicate its operating

status.

FAULT LED - indicates the scanner’s overall status. The red FAULT LED

is off whenever the scanner is configured and operating properly.

COMM LED - allows you to monitor communication with all configured

devices. This LED is green once the scanner is in the Run mode. It is red if

a hardware fault is detected. The COMM LED status information is valid

only when the FAULT LED is off.

The table below explains the scanner and communication status as indicated by

the FAULT and COMM LEDs.

FAULT LED COMM LED Status Information

Flashing

Red Not

applicable

Scanner configuration error.

No RIO link communication attempted.

Duplicate scanner detected on RIO link.

Red Not

applicable Major fault on scanner.

No RIO link communication attempted.

Off Red Hardware fault detected.

Off Off Scanner is operating properly.

Scanner is offline (no RIO link communication attempted).

Off Green Scanner is operating properly.

Scanner is online (active communication established with all

devices).

Off Flashing

Green Scanner is operating properly.

At least one configured RIO link device is not communicating.

Off Flashing

Red Scanner is operating properly.

None of the configured RIO link devices are communicating.

Remote I/O Scanner 7

Publication 1747-5.33

Baud Rate DIP Switch

The figure below shows the location of the DIP switch and the DIP switch

settings for the supported baud rates.

Required Tools and Equipment

Have the following tools and equipment ready:

• medium blade screwdriver

• termination kit (the package, containing resistors and a ring lug, which was

included with the scanner)

• approximately 38 cm (15 inches) of #20 AWG wire for grounding the drain

shield to the SLC chassis (for Series A retrofits)

• adequate length of RIO communication cable (Belden™ 9463) for your

specific application

Important: For proper system operation, the baud rate of all devices

on the RIO link must be the same.

12 12 12 12

57.6K baud

115.2K baud

230.4K baud

8Remote I/O Scanner

Publication 1747-5.33

Installation

Make sure you have set the DIP switch properly before installing the scanner.

Insertion

1. Disconnect power.

2. Align the full-sized circuit board with the chassis card guides. The first slot

(slot 0) of the first rack is reserved for the SLC 500 processor.

3. Slide the module into the chassis until the top and bottom latches catch.

4. Attach the RIO link cable to the connector on the front of the module,

behind the door. Ground the cable’s shield wire to a chassis mounting

bracket. Refer to the RIO link wiring illustration on page 10.

!ATTENTION: Disconnect system power before

attempting to install, remove, or wire the module.

Important: Before installation, make sure that your modular SLC

power supply has adequate reserve current capacity. The

scanner requires 600 mA at 5V dc.

Card Guide

Module Release

Cable Tie

Remote I/O Scanner 9

Publication 1747-5.33

5. Insert the cable tie in the slots.

6. Route the cable down and away from module, securing it with the cable tie.

7. Cover all unused slots with the Card Slot Filler, Catalog Number 1746-N2.

Removal

1. Disconnect power.

2. Remove all cabling.

3. Press the releases at the top and bottom of the module and slide the module

out of the chassis slot.

4. Cover all unused slots with the Card Slot Filler, Catalog Number 1746-N2.

RIO Link Wiring

The scanner is connected to other devices on the RIO link in a daisy chain (serial)

configuration. There are no restrictions governing the space between each

device, provided the maximum cable distance (Belden™ 9463) is not

exceeded.A 1/2 watt terminating resistor (included with the module) must be

attached across line 1 and line 2 of the connectors at each end (scanner and last

physical device) of the RIO link. The size of the resistor depends on the baud

rate and extended node capability, as shown in the table below.

Note: To use extended node, all devices on the RIO link must support it. Refer

to each device’s user manual.

Baud Rate Max. Cable Distance

(Belden 9463) Resistor Size

Using Extended

Node Capability

57.6K baud 3048 m (10,000 ft.) 82

Ω

1/2 Watt

Gray-Red-Black-Gold

115.2K baud 1524 m (5,000 ft.)

230.4K baud 762 m (2,500 ft.)

Not Using

Extended Node

Capability

57.6K baud 3048 m (10,000 ft.) 150

Ω

1/2 Watt

Brown-Green-Brown-Gold

115.2K baud 1524 m (5,000 ft.)

230.4K baud 762 m (2,500 ft.) 82

Ω

1/2 Watt

Gray-Red-Black-Gold

10 Remote I/O Scanner

Publication 1747-5.33

For New Installations

To ensure a proper earth ground of the cable shield, follow these steps:

1. While the RIO link connector is plugged into the scanner and lines 1 and 2

are connected, strip the cable back to expose enough shield drain wire to

reach a chassis mounting bracket.

2. Attach the ring terminal lug (supplied) to the end of the shield drain wire.

3. Attach the ring terminal lug to the SLC chassis mounting bracket. Note that

for new installations the middle (shield) terminal is not used when

connecting to the scanner.

Important: The RIO cable shield must be grounded at the scanner

end only.

RIO Scanner

Chassis Mounting

Bracket

Ring Lug Shield

Drain Wire

(For New Series B Installations)

Shield Drain Wire

(For Series A Retrofits)

RIO Link

Connector Terminating

Resistor

Scanner End

Terminating Resistor

Last Physical Device End

Line 1 – Blue

Shield – Shield

Line 2 – Clear

RIO Link

Connector

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