Allen-Bradley ControlNet 1786-RPFRL/B User manual

Installation Instructions
ControlNet Fiber-optic Ring Repeater
Modules
Catalog Numbers 1786-RPFRL/B, 1786-RPFRXL/B
About the Module
The ControlNet Fiber-optic Ring Repeater module supports fiber media
redundancy by using a ring topology. The fiber-optic technology permits long
(1786-RPFRL/B module) or very long (1786-RPFRXL/B module)
transmission ranges. Both modules provide optimum protection against EMI
effects along the transmission link and at the repeaters themselves. The fiber link
provides ground isolation between nodes and is less susceptible to noisy
environments than traditional copper media.
Topic Page
Important User Information 2
Environment and Enclosure 3
North American Hazardous Location Approval 4
Fiber-optic Safety Statements 5
About Fiber Topology 8
Mount the Fiber Modules 11
Choose Fiber-optic Cable for the Module 19
Connect the Cable Between the Repeater Modules 24
Interpret the Status Indicators 28
Specifications 33
Additional Resources 37
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2ControlNet Fiber-optic Ring Repeater Modules
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
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.rockwellautomation.com/literature/) 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: 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 consequences.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, drive or motor,
to alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, drive or motor,
to alert people that surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of the
product.

ControlNet Fiber-optic Ring Repeater Modules 3
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
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 considered Group 1, Class A industrial equipment
according to IEC/CISPR 11. Without appropriate precautions, there
may be difficulties with electromagnetic compatibility in residential
and other environments due to conducted and radiated disturbances.
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, V2, V1, V0 (or
equivalent) if non-metallic. 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.
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4ControlNet Fiber-optic Ring Repeater Modules
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
North American Hazardous Location Approval
The following information applies
when operating this equipment in
hazardous locations.
Informations sur l’utilisation de cet
équipement en environnements
dangereux.
Products marked "CL I, DIV 2, GP A, B, C, D" are
suitable foruse in Class I Division 2 Groups A, B, C,
D, Hazardous Locations and nonhazardous
locations only. Each product is supplied with
markings on the rating nameplate indicating the
hazardous location temperature code. When
combining products within a system, the most
adverse temperaturecode(lowest"T"number)may
be used to help determine the overall temperature
code of the system. Combinations of equipment in
your system are subject to investigation by the
local Authority Having Jurisdiction at the time of
installation.
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne
conviennent qu'à une utilisation en environnements
de Classe I Division 2 Groupes A, B, C, D dangereux et
non dangereux. Chaque produit est livré avec des
marquages sur sa plaque d'identification qui indiquent
le code de température pour les environnements
dangereux. Lorsque plusieurs produits sont combinés
dans un système, le code de température le plus
défavorable (code de température le plus faible) peut
être utilisé pour déterminer le code de température
global du système. Les combinaisons d'équipements
dans le système sont sujettes à inspection par les
autorités locales qualifiées au moment de
l'installation.
WARNING:
Explosion Hazard -
•Do not disconnect equipment
unless power has been removed
or the area is known to be
nonhazardous.
•Do not disconnect connections to
this equipment unless power has
been removed or the area is
known to be nonhazardous.
Secure any external connections
that mate to this equipment by
using screws, sliding latches,
threaded connectors, or other
means provided with this product.
•Substitution of components may
impair suitability for Class I,
Division 2.
•If this product contains batteries,
they must only be changed in an
area known to be nonhazardous.
AVERTISSEMENT:
Risque d’Explosion –
•Couper le courant ou s'assurer que
l'environnement est classé non
dangereux avant de débrancher
l'équipement.
•Couper le courant ou s'assurer que
l'environnement est classé non
dangereux avant de débrancher les
connecteurs. Fixer tous les
connecteurs externes reliés à cet
équipement à l'aide de vis, loquets
coulissants, connecteurs filetés ou
autres moyens fournis avec ce
produit.
•La substitution de composants peut
rendre cet équipement inadapté à
une utilisation en environnement de
Classe I, Division 2.
•S'assurer que l'environnement est
classé non dangereux avant de
changer les piles.

ControlNet Fiber-optic Ring Repeater Modules 5
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
Prevent Electrostatic Discharge
Fiber-optic Safety Statements
ATTENTION: 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.
ATTENTION: Laser light can damage your eyes. Laser light is
invisible. Looking at it directly does not cause pain. The iris of the
eye will not close involuntarily as when you view a bright light.
Consequently, serious damage to the retina of the eye is possible.
Never look into the end of a fiber when it may have a laser coupled to
it, or directly into fiber ports. Should accidental eye exposure to laser
light be suspected, get an eye examination immediately.
ATTENTION: Class 1 laser product. Laser radiation is present
when the system is open and interlocks bypassed. Only trained and
qualified personnel should be allowed to install, replace, or service
this equipment.
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6ControlNet Fiber-optic Ring Repeater Modules
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
WARNING: Hazardous areas require the use of specially designed
products. Only when the product is marked accordingly (see the
product ID label) it may be used in Class I Division 2 hazardous
environments. Rockwell Automation provides similar products that
are intrinsically safe and are suitable for more hazardous
environments. Use the appropriate products that are designed for
the specific hazardous environments that your installation requires.
In intrinsically-safe applications, consult with your local safety
coordinator because you need specific products on both ends of the
fiber link. Refer to the ControlNet EX Media Planning and
Installation Manual, publication CNET-IN003.
TIP
You must use an adapter module (1786-RPA/B) with the
1786-RPFRL/B or 1786-RPFRXL/B modules to provide power to all
repeaters, and control the flow of data from one repeater to
the next.
IMPORTANT
The distance between repeaters that can be supported is
dependent on the quality of the fiber, number of splices, and
connectors. The total loss of the fiber link must be less than
15 dB for the 1786-RPFRL/B module and 10.5 dB for the
1786-RPFRXL/B module.
The total size of the ring or length of the copper and fiber
ControlNet network is limited by the ControlNet protocol to
20 km or less. Refer to Determine Maximum Network Length
on page 21 for more information.
To determine the maximum distance between any two fiber
modules, refer to the table on page 19.

ControlNet Fiber-optic Ring Repeater Modules 7
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
The 1786-RPFRL/B and 1786-RPFRXL/M modules provide the following:
•Two fiber channels
•Activity status indicators for each fiber channel
•Relay contact connector for communication and system status
Figure 1- Module Components
Relay Contact Connector (not shown)
42546
Right-side
Backplane
Connector
with
Protective
Cover
Both sides of the module contain a backplane connector.
Channel 2 Fiber Port
Module Locking Tab
Channel 1 Fiber Port
Protective
Caps
Indicators
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8ControlNet Fiber-optic Ring Repeater Modules
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
About Fiber Topology
The 1786-RPFRL/B or 1786-RPFRXL/B long or extra-long modules can be
used to create a redundant optical link between segments. When used in a ring
topology, a single media failure between any two repeater modules in a ring will
not impact the communication link.
The repeaters detect the failure of an optical link. When a failure occurs, the
affected channel port status indicator will be one of the following:
•Red, indicating a faulty link
•Flashing green/off, indicating no network activity is present
Refer to Interpret the Status Indicators on page 28 for more information.
In addition, a relay contact connector on the 1786-RPFRL/B and
1786-RPFRXL/B modules indicates a remote faulty link. See page 32 for more
information on the relay contact connector.
We recommend that you install the duplex optical cables of the two optical
channels along different routes. For more information on cabling, refer to
the ControlNet Fiber Media Planning and Installation Guide,
publication CNET-IN001.
The fiber repeater consists of the following:
• A 1786-RPA/B repeater adapter
• Up to two 1786-RPFRL/B or 1786-RPFRXL/B long or extra-long fiber
repeater modules
• Up to four 1786-RPCD copper fiber repeater modules
• Up to four 1786-RPFS or 1786-RPFM short- or medium-distance fiber
repeater modules

ControlNet Fiber-optic Ring Repeater Modules 9
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
The maximum number of repeater modules (in any combination) you can use in
a configuration is dependent on the current draw of each repeater module. Total
current draw supplied by the 1786-RPA/B repeater adapter cannot exceed
1.6 A @ 5V DC.
In addition to using the fiber repeater in a ring topology, you can do the
following:
•Extend the total length of your segment
•Create a point-to-point or star configuration (multiple directions from
one point)
•Provide electrical isolation and immunity to interference
•Use in hazardous areas
The number of fiber repeaters and cable length total limit depends on your
network topology.
Example Topology Application
See page 10 for an example topology.
For more information on topology application rules in relation to fiber rings,
refer to the ControlNet Fiber Media Planning and Installation Guide,
publication CNET-IN001.
IMPORTANT
You cannot have media redundancy if you have a closed loop ring
installation anywhere in the network. You may use the
1786-RPFRL/B, 1786-RPFRXL/B, 1786-RPFM, or 1786-RPFS
modules in a linear fiber topology.
Do not mix fiber repeater modules to achieve a ring topology and
1786-RPFM modules to achieve a redundant media topology in
one configuration.
For additional topology configurations, refer to Allowable
Configurations When Using Repeaters in a Ring Topology on
ControlNet, Knowledgebase Technical Note ID 32215.
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10 ControlNet Fiber-optic Ring Repeater Modules
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
Fiber-optic Ring Topology
Use this configuration for long distances. A fiber-optic ring may contain as many
as 20 member modules. These member modules (four shown in Figure 2)
include the following:
•1786-RPA/B repeater adapter module
•1786-RPFRL/B long-distance ring repeater module
•1786-RPFRXL/B extra long-distance ring repeater module
Figure 2 - Fiber Ring Topology Example
TIP
You cannot exceed 20 repeater modules in a series. If a ring is
broken, whether accidentally or on purpose for testing, the
configuration then becomes linear and the number of repeaters
depends on where the ring is broken. Most likely you will have as
many repeaters as in the original ring, such as the four shown in
Figure 2.
1786-RPA
1786-RPFR(X)L
1786-RPFR(X)L
1786-RPA
CH1 CH2
CH1 CH2
1786-RPA 1786-RPFR(X)L
1786-RPA
1786-RPFR(X)L
CH1 CH2
CH1 CH2
Rx Tx Rx Tx
Rx Tx Rx Tx
Rx Tx
Rx Tx
Rx Tx
Rx Tx
1794-ACNR15
1794-ACNR15
1794-ACNR15
31237-M
On all fiber repeater modules, the leftmost connector is the RX (Receive) port;
the rightmost connector is the TX (Transmit) port.