Rockwell Automation 1769-ASCII User Manual

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Installation Instructions

Compact 1769-ASCII Module

Cat. No. 1769-ASCII

Inside…

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

Install the Module

Assemble the System

Mount Expansion I/O

Ground the Module

Connect the D-sub Connector Pins

I/O Memory Mapping

Configure the 1769-ASCII Module

Specifications

Status Indicators

Troubleshoot with Error Codes

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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

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

pu 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 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

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

par

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

nsiderations. The following annotations and their accompanying statements

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

the consequences of a potential hazard:

Guidelines for the Application,

WARNING

ATTENTION

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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.

Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss.

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Compact 1769-ASCII Module 3

IMPORTANT

ATTENTION

Identifies information that is critical for successful application and understanding of the product.

Environment and Enclosure

This equipment is intended for use in a Pollution Degree 2

dustrial environment, in overvoltage Category II applications

in (as defined in IEC publication 60664-1), at altitudes up to 2000 meters without derating.

This equipment is considered Group 1, Class A industrial

quipment according to IEC/CISPR Publication 11. Without

e 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

mounted within an enclosure that is suitably designed for

be 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 pu

blication 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.

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4 Compact 1769-ASCII Module

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

ector

conn

3b Channel 1 isolated ASCII

ector

conn

4 Stationary bus connector with

male pi

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Compact 1769-ASCII Module 5

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

(2)

exceeding Over Voltage Category II

(IEC 60664-1).

(1)

) and to circuits not

(3)

ATTENTION

Preventing Electrostatic Discharge

This equipment is sensitive to electrostatic discharge, which can cause inter

nal damage and affect normal operation. Follow these

guidelines when you handle this equipment:

ouch a grounded object to discharge potential static.

• T

ear an approved grounding wriststrap.

• W

• Do not touch connectors or pins on component boards.

o not touch circuit components inside the equipment.

• D

vailable, use a static-safe workstation.

• If a

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.

(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.

(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.

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6 Compact 1769-ASCII Module

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.

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.

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1. Disconnect power.

Compact 1769-ASCII Module 7

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:

nding an erroneous signal to your system’s field devices,

• se causing unintended machine motion

sing an explosion in a hazardous environment

• cau

Electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance.

2. Che

ck that the bus lever of the module to be installed is in the

unlocked (fully right) position.

e the upper and lower tongue-and-groove slots (1) to secure the

3. Us modules together or to a controller.

ve the module back along the tongue-and-groove slots until the

4. Mo bus connectors (2) line up with each other.

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

5. Use slightly to clear the positioning tab (3).

o enable communication between the controller and module, move

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

Ensure it is locked firmly in place.

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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8 Compact 1769-ASCII Module

7. Attach an end-cap terminator (5) to the last module in the system by using the tongue-and-groove slots as before.

ck the end-cap bus terminator (6).

8. Lo

IMPORTANT

You must use a 1769-ECR or -ECL right- or left-end cap to terminate the end of the serial communication bus.

Mount Expansion I/O

ATTENTION

IMPORTANT

Minimum Space

Maintain spacing from enclosure walls, wireways, adjacent equipment, etc. Allow 50 mm (2 in) of space on all sides for adequate ventilation.

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.

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.

To p

Side Side

Controller

Compact I/O

End Cap

Compact I/O

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Bottom

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Compact 1769-ASCII Module 9

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

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)

Host Controller

(1.38)

Compact I/O

28.5

(1.12)

Compact I/O

Right End Cap

NOTE: All dimensions are in mm (inches). Ho spacing tolerance:

±0.4 mm (0.016 in.)

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.

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

1. On

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

of all module-mounting holes on the panel.

eturn the assembled modules to the clean work surface, including

3. R any previously mounted modules.

rill and tap the mounting holes for the recommended M4 or #8

4. D screw.

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10 Compact 1769-ASCII Module

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

ttach the modules to the panel using the mounting screws.

6. A

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

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

pu tapping of the next group.

epeat steps 1 to 6 for any remaining modules.

7. R

Mount on the DIN Rail

The module can be mounted on these DIN rails:

x 7.5 mm (EN 50022 - 35 x 7.5)

• 35

x 15 mm (EN 50022 - 35 x 15)

• 35

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

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

th will momentarily open and lock into place.

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Compact 1769-ASCII Module 11

Replace a Single Module Within a System

The module can be replaced while the system is mounted to a panel or DIN rail.

move power.

1. Re

ATTENTION

nding an erroneous signal to your system’s field devices,

• se causing unintended machine motion

sing an explosion in a hazardous environment

• cau

Electrical arcing causes excessive wear to contacts on both the

odule and its mating connector. Worn contacts may create

m electrical resistance.

2. On

the module to be removed, remove the upper and lower mounting screws from the module (or open the DIN latches using a flat-blade or Phillips-style screwdriver).

ve the bus lever to the right to disconnect (unlock) the bus.

3. Mo

ove the bus lever on the right-side adjacent module to the right

4. M (unlock) to disconnect it from the module to be removed.

ntly slide the disconnected module forward.

5. Ge

If you feel excessive resistance, check that the module has been disconnected from the bus, and that both mounting screws have been removed (or DIN latches opened).

You may need to rock the module slightly from front to back to remove it, or, in a panel-mounted system, to loosen the screws of adjacent modules.

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12 Compact 1769-ASCII Module

6. Before installing the replacement module, be sure that the bus lever on the module to be installed and on the right-side adjacent module are in the unlocked (fully right) position.

ide the replacement module into the open slot.

7. Sl

nect the modules together by locking (fully left) the bus levers on

8. Con the replacement module and the right-side adjacent module.

eplace the mounting screws (or snap the module onto the DIN rail).

9. R

Ground the Module

This product is intended to be mounted to a well-grounded mounting surface such as a metal panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if used) are not required unless the mounting surface cannot be grounded. Refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1, for additional information.

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+ 28 hidden pages

Rockwell Automation 1769-ASCII User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important User Information

About the Module

Install the Module

Assemble the System

Mount Expansion I/O

Ground the Module