Allen-Bradley ControlNet 1786-RPFRL/B Manuale utente

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.

Spare Allen-Bradley Parts

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.

Spare Allen-Bradley Parts

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.

Spare Allen-Bradley Parts

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-RPA

CH1 CH2

1786-RPA 1786-RPFR(X)L

1786-RPA

1786-RPFR(X)L

CH1 CH2

Rx Tx Rx Tx

Rx Tx

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.

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