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.
Publication
1734-IN017A-EN-P - December 2005
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.
Publication
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.
Publication
1734-IN017A-EN-P - December 2005
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