Allen-Bradley 1769-ASCII Manual de usuario

Publication 1769-IN068B-EN-P - May 2005

Installation Instructions

Compact 1769-ASCII Module

Cat. No. 1769-ASCII

Inside…

About the Module ............................................................................................4

Install the Module.............................................................................................5

Assemble the System........................................................................................6

Mount Expansion I/O ....................................................................................8

Ground the Module........................................................................................12

Connect the D-sub Connector Pins ............................................................13

I/O Memory Mapping...................................................................................16

Configure the 1769-ASCII Module .............................................................25

Specifications...................................................................................................29

Status Indicators..............................................................................................32

Troubleshoot with Error Codes ...................................................................33

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Publication 1769-IN068B-EN-P - May 2005

Important User Information

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

those responsible for the application and use of these products 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. In no event will

Rockwell Automation be responsible or liable for indirect or consequential

damage resulting from the use or application of these products.

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

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

variables and requirements associated with any particular installation,

Rockwell Automation 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

Rockwell Automation 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

part, without written permission of Rockwell Automation, is prohibited.

Throughout this publication, notes may be used to make you aware of safety

considerations. The following annotations and their accompanying statements

help you to identify a potential hazard, avoid a potential hazard, and recognize

the consequences of a potential hazard:

WARNING Identifies information about practices or circumstances that can

cause an explosion in a hazardous environment, which may lead

to personal injury or death, property damage, or economic loss.

ATTENTION Identifies information about practices or circumstances that can

lead to personal injury or death, property damage, or economic

loss.

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Publication 1769-IN068B-EN-P - May 2005

IMPORTANT Identifies information that is critical for successful application

and understanding of the product.

ATTENTION Environment and Enclosure

This equipment is intended for use in a Pollution Degree 2

industrial environment, in overvoltage Category II applications

(as defined in IEC publication 60664-1), at altitudes up to 2000

meters without derating.

This equipment is considered Group 1, Class A industrial

equipment according to IEC/CISPR Publication 11. Without

appropriate precautions, there may be potential difficulties

ensuring electromagnetic compatibility in other environments

due to conducted as well as radiated disturbance.

This equipment is supplied as “open type” equipment. It must

be mounted within an enclosure that is suitably designed for

those specific environmental conditions that will be present and

appropriately designed to prevent personal injury resulting from

accessibility to live parts. The interior of the enclosure must be

accessible only by the use of a tool. Subsequent sections of this

publication may contain additional information regarding

specific enclosure type ratings that are required to comply with

certain product safety certifications.

NOTE: See NEMA Standards publication 250 and IEC

publication 60529, as applicable, for explanations of the degrees

of protection provided by different types of enclosure. Also, see

the appropriate sections in this publication, as well as the

Allen-Bradley publication 1770-4.1 (“Industrial Automation

Wiring and Grounding Guidelines”), for additional installation

requirements pertaining to this equipment.

4Compact 1769-ASCII Module

Publication 1769-IN068B-EN-P - May 2005

About the Module

The 1769-ASCII module provides a flexible network interface to a wide

variety of RS-232, RS-485, and RS-422 ASCII devices. The module provides

the communication connections to the ASCII device.

Item Description

1a Upper DIN rail latch

1b Lower DIN rail latch

2a Upper tongue-and-groove slots

2b Lower tongue-and-groove slots

3a Channel 0 isolated ASCII

connector

3b Channel 1 isolated ASCII

connector

4Stationary bus connector with

male pins

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Publication 1769-IN068B-EN-P - May 2005

Install the Module

Compact I/O is suitable for use in an industrial environment when installed

in accordance with these instructions. Specifically, this equipment is intended

for use in clean, dry environments (Pollution Degree 2(1)) and to circuits not

exceeding Over Voltage Category II(2) (IEC 60664-1).(3)

(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except

that occasionally a temporary conductivity caused by condensation shall be expected.

ATTENTION Preventing Electrostatic Discharge

This equipment is sensitive to electrostatic discharge, which can

cause internal damage and affect normal operation. Follow these

guidelines when you handle this equipment:

•Touch a grounded object to discharge potential static.

•Wear an approved grounding wriststrap.

•Do not touch connectors or pins on component boards.

•Do not touch circuit components inside the equipment.

•If available, use a static-safe workstation.

When not in use, store the equipment in appropriate static-safe

packaging.

WARNING If you connect or disconnect the serial cable with power applied

to this module or the serial device on the other end of the cable,

an electrical arc can occur. This can cause an explosion in

hazardous locations. Be sure that power is removed or the area is

nonhazardous before proceeding.

(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level

transient voltages are controlled and do not exceed the impulse voltage capability of the product’s

insulation.

(3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC)

designations.

6Compact 1769-ASCII Module

Publication 1769-IN068B-EN-P - May 2005

Assemble the System

Attach the module to the controller or an adjacent I/O module before or

after mounting. For mounting instructions, see the Panel Mount or Mount on

the DIN Rail sections. To work with a system that is already mounted, see

Replace a Single Module Within a System section.

ATTENTION This product is grounded through the DIN rail to chassis

ground. Use zinc-plated, yellow-chromate steel DIN rail to

assure proper grounding. The use of other DIN rail materials

(e.g., aluminum, plastic, etc.), which can corrode, oxidize, or are

poor conductors, can result in improper or intermittent

grounding.

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Publication 1769-IN068B-EN-P - May 2005

1. Disconnect power.

2. Check that the bus lever of the module to be installed is in the

unlocked (fully right) position.

3. Use the upper and lower tongue-and-groove slots (1) to secure the

modules together or to a controller.

4. Move the module back along the tongue-and-groove slots until the

bus connectors (2) line up with each other.

5. Use your fingers or a small screwdriver to push the bus lever back

slightly to clear the positioning tab (3).

6. To enable communication between the controller and module, move

the bus lever fully to the left (4) until it clicks.

Ensure it is locked firmly in place.

ATTENTION Remove power before removing or inserting this module. When

you remove or insert a module with power applied, an electrical

arc may occur. An electrical arc can cause personal injury or

property damage by:

•sending an erroneous signal to your system’s field devices,

causing unintended machine motion

•causing an explosion in a hazardous environment

Electrical arcing causes excessive wear to contacts on both the

module and its mating connector. Worn contacts may create

electrical resistance.

ATTENTION When attaching I/O modules, it is very important that the bus

connectors are securely locked together to ensure proper

electrical connection.

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Publication 1769-IN068B-EN-P - May 2005

7. Attach an end-cap terminator (5) to the last module in the system by

using the tongue-and-groove slots as before.

8. Lock the end-cap bus terminator (6).

Mount Expansion I/O

Minimum Space

Maintain spacing from enclosure walls, wireways, adjacent equipment, etc.

Allow 50 mm (2 in) of space on all sides for adequate ventilation.

IMPORTANT You must use a 1769-ECR or -ECL right- or left-end cap to

terminate the end of the serial communication bus.

ATTENTION During panel or DIN rail mounting of all devices, be sure that all

debris (metal chips, wire strands, etc.) is kept from falling into

the module. Debris that falls into the module could cause

damage on power up.

IMPORTANT When mounting the CompactLogix system, either use screws

to panel mount the system OR use DIN rail. Do NOT use

both. Use of both mounting methods may cause hardware

damage and cause the system to fail.

Controller

Compact I/O

End Cap

Top

Bottom

Side Side

Compact 1769-ASCII Module 9

Publication 1769-IN068B-EN-P - May 2005

Panel Mount

Mount the module to a panel by using two screws per module. Use M4 or #8

panhead screws. Mounting screws are required on every module.

Panel Mount Procedure With the Dimensional Template

Panel Mount Procedure With Modules as a Template

The following procedure lets you use the assembled modules as a template for

drilling holes in the panel. Due to module mounting hole tolerance, it is

important to follow these procedures.

1. On a clean work surface, assemble no more than three modules.

2. Using the assembled modules as a template, carefully mark the center

of all module-mounting holes on the panel.

3. Return the assembled modules to the clean work surface, including

any previously mounted modules.

4. Drill and tap the mounting holes for the recommended M4 or #8

screw.

Host Controller

Compact I/O

Right End Cap

NOTE: All dimensions

are in mm (inches). Ho

spacing tolerance:

±0.4 mm (0.016 in.)

or more than 2 modules: (number of modules - 1) X 35 mm (1.38 in.)

Refer to host controller documentation for this dimension.

132

(5.197)

122.6±0.2

(4.826±0.008)

(1.38)

28.5

(1.12)

10 Compact 1769-ASCII Module

Publication 1769-IN068B-EN-P - May 2005

5. Place the modules back on the panel, and check for proper hole

alignment.

6. Attach the modules to the panel using the mounting screws.

If mounting more modules, mount only the last one of this group and

put the others aside. This reduces remounting time during drilling and

tapping of the next group.

7. Repeat steps 1 to 6 for any remaining modules.

Mount on the DIN Rail

The module can be mounted on these DIN rails:

•35 x 7.5 mm (EN 50022 - 35 x 7.5)

•35 x 15 mm (EN 50022 - 35 x 15)

Before mounting the module on a DIN rail, close the DIN rail latches. Press

the DIN rail mounting area of the module against the DIN rail. The latches

will momentarily open and lock into place.

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