Rockwell Automation 1734-EPAC User Manual

Installation Instruction

POINT I/O 120/240V ac Expansion Power
Supply

Catalog Number 1734-EPAC

Contents

For See Page

Important User Information 2
Before You Begin 4
Identify the Components 4
Install the ac Expansion Power Supply 6
Remove an ac Expansion Power Supply from the DIN Rail 6
Replace an ac Expansion Power Supply 7
Wire the ac Expansion Power Supply 8
North American Hazardous Location Approval 12
Specifications 13
Current Derating for DIN-Rail Mounting Orientation 16

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2 POINT I/O 120/240V ac Expansion Power Supply

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

Important User Information

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.literature.rockwellautomation.com) 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.

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.

Identifies information about practices or circumstances 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 (for example, drive or motor) to
alert people that dangerous voltage may be present.

Publication

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

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POINT I/O 120/240V ac Expansion Power Supply 3

ATTENTION

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.

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 Industrial Automation Wiring and
Grounding Guidelines, Allen-Bradley publication 1770-4.1, for
additional installation requirements pertaining to this equipment.

POINT I/O is grounded through the DIN rail to chassis ground. Use
zinc plated, yellow-chromated steel DIN rail to assure proper
grounding. Using other DIN rail materials (for example, aluminum or
plastic) which can corrode, oxidize, or are poor conductors can result
in improper or intermittent platform grounding.

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4 POINT I/O 120/240V ac Expansion Power Supply

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.

• Use a static-safe workstation, if available.

• Store the equipment in appropriate static-safe packaging

when not in use.

Before You Begin

Read this manual for information about how to install the 1734-EPAC
POINT I/O 120/240V ac Expansion Power Supply.

Identify the Components

Use the figure to identify the external features of the ac expansion power
supply.

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1734-IN017A-EN-P - December 2005

About the ac Expansion Power Supply

1734-EPAC

1734-EPAC Power
Supply

Removable
Terminal
Block (RTB)

RTB Removal Handle

DIN-rail Locking
Screw

Module Label

Interlocking
Side Pieces

The 1734-EPAC ac expansion power supply passes 120/240V ac field power
to the I/O modules to the right of it. This unit extends the backplane bus
power for up to 17 I/O modules to the right of the supply, and creates a new
field-voltage partition segment for driving field devices. The number of I/O
modules supported by this power supply depend on the current required for
each module and the DIN-rail mounting position. Do not exceed the current
draw as shown in the specifications.

The ac expansion power supply also separates field power from I/O modules
to the left of the unit, effectively providing functional and logical partitioning
for:

POINT I/O 120/240V ac Expansion Power Supply 5

• separating field power between input and output modules.

• grouping modules to perform a specific task or function.

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1734-IN017A-EN-P - December 2005