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Installation Instructions
FOUNDATION Fieldbus Junction Box
Catalog Number 1788-FBJB4R, 1788-FBJB6
Topic |
Page |
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Important User Information |
2 |
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About the Junction Boxes |
3 |
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Additional Resources |
3 |
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Installation Requirements |
4 |
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Wire the Junction Box |
8 |
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Set DIP Switches |
11 |
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Operate the Junction Box |
12 |
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Specifications |
13 |
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Certifications (when product is marked) |
15 |
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Dimensions |
16 |
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2 FOUNDATION Fieldbus Junction Box
Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
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: 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. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
Labels may also be on or inside the equipment to provide specific precautions.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).
Rockwell Automation Publication 1788-IN006A-EN-P - September 2014
FOUNDATION Fieldbus Junction Box 3
About the Junction Boxes
The 1788-FBJB4R and 1788-FBJB6 junction boxes provide a simple and fault tolerant means of connecting a FOUNDATION Fieldbus network. The 1788-FBJB4R connects to up to four field devices and has dual trunk input and output connectors for use in redundant FOUNDATION Fieldbus configurations. The 1788-FBJB6 has a single trunk input connector and trunk output connector and connects to up to six field devices.
The junction box continuously monitors the bus current on each field device port. If a field device port over-current fault is detected, current to the faulted port is limited to a safe value. Even with one drop line shorted, all other field devices are able to communicate.
Additional Resources
These documents contain additional information concerning related products from Rockwell Automation.
Resource |
Description |
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FOUNDATION Fieldbus Linking Devices Technical |
Provides technical data and specifications for the |
Data, publication 1788-TD001 |
FOUNDATION Fieldbus linking devices. |
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FOUNDATION Fieldbus Design Considerations |
Provides design choices and best practices for |
Reference Manual, publication PROCES-RM005 |
implementing a FOUNDATION Fieldbus network |
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with the 1788-EN2FFR and 1788-CN2FFR linking |
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devices. |
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EtherNet/IP and ControlNet to FOUNDATION Fieldbus |
Describes installation and operation of the |
Linking Device User Manual, publication |
1788-EN2FFR and 1788-CN2FFR linking devices. |
1788-UM057 |
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Industrial Automation Wiring and Grounding |
Provides general guidelines for installing a Rockwell |
Guidelines, publication 1770-4.1 |
Automation industrial system. |
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Product Certifications website, http://www.ab.com |
Provides declarations of conformity, certificates, and |
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other certification details. |
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You can view or download publications at http://www.rockwellautomation.com/literature/. To order paper copies of technical documentation, contact your local Allen-Bradley distributor or
Rockwell Automation sales representative.
Rockwell Automation Publication 1788-IN006A-EN-P - September 2014
4 FOUNDATION Fieldbus Junction Box
Installation Requirements
WARNING: If you connect or disconnect the communications cable with power applied to this module or any device on the network, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding.
ATTENTION: Prevent 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.
To comply with the CE Low Voltage Directive (LVD), all connections to this equipment must be powered from a source compliant with Safety Extra Low
Voltage (SELV) or Protected Extra Low Voltage (PELV).
To comply with UL restrictions, all connections to this equipment must be powered from a source compliant with Class 2 or Limited Voltage/Current.
Rockwell Automation Publication 1788-IN006A-EN-P - September 2014
FOUNDATION Fieldbus Junction Box 5
Environment and Enclosure
ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is not intended for use in residential environments and may not provide adequate protection to radio communication services in such environments.
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 enclosure must have suitable flame-retardant properties to prevent or minimize the spread of flame, complying with a flame spread rating of 5VA or be approved for the application if nonmetallic. 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.
In addition to this publication, see the following:
•Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1, for additional installation requirements.
•NEMA Standard 250 and IEC 60529, as applicable, for explanations of the degrees of protection provided by enclosures.
Rockwell Automation Publication 1788-IN006A-EN-P - September 2014
6 FOUNDATION Fieldbus Junction Box
European Hazardous Location Approval
This equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/EC and has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of Category 3 equipment intended for use in Zone 2 potentially explosive atmospheres, given in Annex II to this Directive.
Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 60079-15:2010 and
EN 60079-0:2012+A11:2013..
WARNING: This equipment shall be mounted in an ATEX-certified enclosure with a minimum ingress protection rating of at least IP54 (as defined in IEC 60529) and used in an environment of not more than Pollution Degree 2 (as defined in IEC 60664-1) when applied in Zone 2 environments. The enclosure must have a tool-removable cover or door.
WARNING: Provision shall be made, either in the apparatus or external to the apparatus, to prevent the rated voltage from being exceeded by transient disturbances of more than 140%.
WARNING: Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means provided with this product.
WARNING: Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.
WARNING: Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.
WARNING: Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means provided with this product
WARNING: This equipment shall be used within its specified ratings defined by Rockwell Automation.
WARNING: Devices shall be used in an environment of not more than Pollution Degree 2.
ATTENTION: This equipment is not resistant to sunlight or other sources of UV radiation.
Rockwell Automation Publication 1788-IN006A-EN-P - September 2014
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