Rockwell Automation 1788-CN2FF User Manual
Installation Instructions
ControlNet-to-Foundation Fieldbus H1 Linking
Device
Catalog 1788-CN2FF
Product Overview
ATTENTION
The ControlNet-to-Foundation Fieldbus H1 linking device (1788-CN2FF) connects a
ControlNet™ network with one or two F
Each H1 network consists of multiple Fieldbus devices. Each field device has one or more
function blocks. Each function block performs an elementary control function such as analog
input, analog output, discrete input, or discrete output. The ControlNet network consists of
controllers, such as PLC
1788-CN2FF has three broad functions, supporting the following:
• closed-loop control
• configuration
• a redundant ControlNet network design
The 1788-CN2FF module ships from the factory with
configuration switches set to “ON (RESET)”. With switches
“ON”, any configuration data would be reset on Power
interruption. Set the switches to “OFF (NORMAL)” after initial
power-up (to clean any Factory test configurations) but before you
configure the module with your application.
Remove power to the module before resetting configuration
switches. For more information on configuration
to Configuring the 1788-CN2FF Linking Device on page 9.
OUNDATION Fieldbus H1 (Fieldbus) networks.
®
processors, HMIs, drives, I/O devices, and so on. The
refer
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2 ControlNet-to-Foundation Fieldbus H1 Linking Device
Use this document as a guide when you install the 1788-CN2FF module.
For information about: Refer to page:
Important User Information 4
Handling the 1788-CN2FF Module 6
System Requirements 6
1788-CN2FF Hardware Description 7
Installation Considerations 7
Power Conditioning 8
Configuring the 1788-CN2FF Linking Device 9
Installing the 1788-CN2FF 10
Removing the 1788-CN2FF 11
Connecting Power 12
Connecting to the ControlNet Network 13
Interpreting the LEDs: ControlNet Network Status 15
Interpreting the LEDs: Module Status 16
Connecting to the Fieldbus Network 17
Device vs. Connection Clarifications 18
Specifications 22
Rockwell Automation Support 24
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ControlNet-to-Foundation Fieldbus H1 Linking Device 3
Additional Information
Refer to the following publications for additional information on the NI-FBUS Configurator,
the 1788-CN2FF Linking Device, and general fieldbus solutions information.
Pub Number Publication Title Scope Source
AG-140 Wiring and Installation
AG-163 31.25 kbit/s Intrinsically
AG-165 Fieldbus Installation and
1788-UM052 NI-FBUS Configurator
1788-6.5.1 ControlNet to Foundation
1757UM006
31.25 kbit/s, Voltage
Mode, Wire Medium
Application Guide
Safe Systems
Planning Guide
User Manual
Fieldbus User Manual
Fieldbus Solutions for
Rockwell Automation’s
Integrated Architecture
Overview of what you need to
know to wire, power, and
layout network components
Complements the previous
document, introduces you to
the principles of intrinsic
safety, and outlines how to
apply approved devices in a
hazardous area.
Outlines things to consider
before installing a Fieldbus
network
Provides the information you
need to use the NI-FBUS
Configurator software.
Provides the information about
the 1788-CN2FF module.
Overview of integrating
fieldbus into ProcessLogix,
ControlLogix and PLC5.
Fieldbus Foundation
9005 Mountain Ridge Dr.,
Bowie - Suite 190
Austin, TX 78759 USA
512.794.8890
www.fieldbus.org
Rockwell Automation
www.theautomationbookstore
.com
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4 ControlNet-to-Foundation Fieldbus H1 Linking Device
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.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 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.
IMPORTANT
ATTENTION
SHOCK HAZARD
BURN HAZARD
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 drive to alert people that dangerous voltage
may be present.
Labels may be located on or inside the drive to alert people that surfaces may be
dangerous temperatures.
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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 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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Handling the 1788-CN2FF Module
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.
System Requirements
This section describes the required hardware and software components you need before you
can use the 1788-CN2FF. You should also review the README.TXT file on the setup disk
for the latest information.
Hardware
• ControlNet-to-Foundation Fieldbus H1 linking device, 1788-CN2FF module
• PC ControlNet interface: 1784-KTCX15, 1784-PCC, 1784-PCIC
• ControlNet and Fieldbus cabling
Software
The following software is necessary to configure the Fieldbus devices and the 1788-CN2FF
using ControlNet.
• Windows NT 4.0, service pack 6 or Windows 2000, service pack 3 or higher
• NI-FBUS Configurator, 1788-FFCT version 2.6.0 or higher
• RSLinx OEM 2.40.00 (build 16) or later, RSLinx Lite is not sufficient.
Other Software
To use the 1788-CN2FF module with RSLogix 5000 and a ControlLogix controller you will
need:
• RSLogix 5000 version 11.11 or later
• RSNetWorx for ControlNet version 4.01.00 (build 04) or later
To use the 1788-CN2FF module with ProcessLogix, refer to:
• The ProcessLogix Installation and Upgrade Guide.
• Knowledge Builder
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ControlNet-to-Foundation Fieldbus H1 Linking Device 7
1788-CN2FF Hardware Description
Figure 1 ControlNet-to-Foundation Fieldbus Linking Device
1
9
8
7
2
3
10
6
4
1
5
43163
1. ControlNet A and B BNC
Connectors, to support single or
redundant network topologies.
2. Case/Enclosure
3. ControlNet Network Status LEDs
4. Non-isolated ControlNet Network
Access Port (NAP)
5. Power Supply Connector
6. DIN Rail Clip
7. ControlNet Module STATUS LED
8. Fieldbus Connectors
9. Network Address Switches
(under cover)
10. Not Used
Installation Considerations
The 1788-CN2FF is designed to be mounted on a 35 mm DIN rail. The device dimensions
are 4.375 x 4.375 and is 4.5 inches high. ControlNet connectors are on top of the unit, allow
1.5 inches for the connectors.
IMPORTANT
Make sure that the power to the network is off
when connecting the module.
The CN2FF supports redundant media and a ControlNet network access port (NAP). There
are 2 (A, B) BNC ControlNet connectors. We recommend using the “A” BNC connector
when setting up a single network and then using the “B” connector for the second
(redundant) network. It does not matter, but when you are working with redundant networks,
the industry tends to refer to the primary network as A and the secondary network as B.
The ControlNet status LEDs on the front of the module display the current status of each of
the redundant media channels. The rotary switches are used to set the ControlNet network
address. You can write the network address in the space provided on front of the device.
The module has two separate Fieldbus ports which supports 2 Fieldbus networks. The power
connections are used to supply power to the CN2FF.
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Power Conditioning
You must use a power conditioner between your Fieldbus power supply and the Fieldbus
network. You can use a power supply designed for Foundation Fieldbus operation which has
the proper power conditioning elements. If you are using an ordinary power supply, a separate
power conditioner must also be used. If an ordinary power supply is connected directly to the
Fieldbus, the power supply would absorb signals on the cable because it would try to maintain
a constant voltage level. The power conditioner puts an inductor between the power supply
and the Fieldbus wiring. The inductor connects the DC power to the Fieldbus wiring but
prevents signals from going into the power supply.
In practice, a real inductor is not used in the power conditioner but an electronic equivalent.
The electronic inductor circuit has the added advantage of limiting the current provided to
the network segment if the cable is shorted.
The voltage supplied to the Fieldbus cable can be as high as 32 V. The voltage at any device
can be as low as 9 V for the device to operate correctly. A typical Fieldbus device takes about
20 mA of current from the cable. The Fieldbus is configured so that one of the wires has a
(+) voltage, the other wire has a (-) voltage and the shield is grounded.
A cable with the orange wire as plus and the blue wire as minus is shown above. This type of
cable is available from Fieldbus cable manufacturers. Other cables or existing plant wiring
conventions may be different. Regardless of the color convention, keep the sense of Fieldbus
(1)
polarity consistent throughout the plant.
IMPORTANT
We suggest that you not use White/Black or White/Red pairs since
they may be mistaken for 115 volt power wiring.
Be sure to follow the wiring and installation requirements in the Foundation Fieldbus
publications listed in the section
(1)
RELCOM inc., Fieldbus Wiring Design and Installation Guide (2221 Yew Street, Forest Grove, OR 97116) p. 5. Reprinted by
permission.
Additional Information on page 3.
Publication 1788-IN051D-EN-P - February 2004
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