Rockwell Automation 1738-EXT1, 1738-EXT3 User Manual

Installation Instructions

ArmorPoint Extension Units, Series A

Cat. No. 1738-EXT1 and -EXT3

What Is the ArmorPoint Extension Unit?

Important User Information

Use an ArmorPoint I/O extension unit to extend the backplane to
additional I/O. The 1738-EXT1 is a one-meter bus extension unit. The
1738-EXT3 is a three-meter bus extension unit.

Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application,
Installation and Maintenance of Solid State Controls (Publication SGI-1.1
available from your local Rockwell Automation sales office or online at
http://www.ab.com/manuals/gi) describes some important differences
between solid state equipment and hard-wired electromechanical devices.
Because of this difference, and also because of the wide variety of uses for
solid state equipment, all persons responsible for applying this equipment
must satisfy themselves that each intended application of this equipment is
acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for
indirect or consequential damages resulting from the use or application of
this equipment.

The examples and diagrams in this manual are included solely for illustrative
purposes. Because of the many variables and requirements associated with
any particular installation, Rockwell Automation, Inc. cannot assume
responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to
use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without
written permission of Rockwell Automation, Inc. is prohibited.

Throughout this manual, when necessary we use notes to make you aware of
safety considerations.

WARNING

IMPORTANT

1 Publication 1738-IN018A-EN-E - December 2004

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

2 ArmorPoint Extension Units, Series A

SHOCK HAZARD

ATTENTION

BURN HAZARD

ATTENTION

Identifies information about practices or circ um st anc e s
that can lead to personal injury or death, property
damage, or economic loss. Attentions help you:

• identify a hazard

• avoid a hazard

• recognize the consequence

Labels may be located on or inside the equipment (e.g.,
drive or motor) to alert people that dangerous voltage may
be present.

Labels may be located on or inside the equipment (e.g.,
drive or motor) to alert people that surfaces may be
dangerous temperatures.

Environment and Enclosure

This equipment is intended for use 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.

Publication 1738-IN018A-EN-E - December 2004

This equipment is supplied as "enclosed" equipment. It
should not require additional system enclosure when used
in locations consistent with the enclosure type ratings
stated in the Specifications section of this publication.
Subsequent sections of this publication may contain
additional information regarding specific enclosure type
ratings, beyond what this product provides, 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.

ArmorPoint Extension Units, Series A 3

46 mm

Mount the Extension Unit

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.

To mount the extension unit on a wall or panel, use the screw holes
provided in the extension unit.

Refer to the drilling dimensions mounting illustration for the extension
unit.

Drilling Dimensions

4.02 in.
102 mm

Adapter

1.81 in.

1.9 in.

47.2 mm

2.0 in.
50 mm

Install the extension unit as follows:

1. Lay out the required points as shown in the drilling dimension
drawing.

2. Drill the necessary holes for #8 (M4) machine or self-tapping
screws.

3. Mount the extension unit using #8 (M4) screws.

Total length of cable
is 1M (EXT1) or
3M (EXT3)

Ground lug connection

0.94 in.

23.9 mm

0.87 in.
22 mm

2.0 in.
50 mm

43839

4. Ground the system using the ground lug connection. (The
ground lug connection is also a mounting hole.)

Publication 1738-IN018A-EN-E - December 2004