Rockwell Automation 1768-CNBR Installation Instructions

Installation Instructions

CompactLogix ControlNet Interface Module

Catalog Numbers 1768-CNB, 1768-CNBR

Top ic Page

Important User Information 2

North American Hazardous Location Approval 3

Environment and Enclosure 4

Prevent Electrostatic Discharge 5

Before You Begin 6

Installing the Modules 8

Connect to a ControlNet Network 16

Remove a Module 22

Interpreting the Status Indicators 24

ControlNet Network Channel-status Indicators 27

Specifications 28

About This Publication

Use this document as a guide to install the CompactLogix ControlNet Bridge
Interface Module.

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2 CompactLogix ControlNet Interface Module

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://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.

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 to identify a
hazard, avoid a hazard and recognize the consequences.

Labels may be on or inside the equipment, for example, a drive or motor, to alert
people that dangerous voltage may be present.

Labels may be on or inside the equipment, for example, a drive or motor, to alert
people that surfaces may reach dangerous temperatures.

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CompactLogix ControlNet Interface Module 3

North American Hazardous Location Approval

The following information applies
when operating this equipment in
hazardous locations.

Products marked CL I, “DIV 2, GP A, B, C, D” are
suitable for use 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 temperature code (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.

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.

Informations sur l'utilisation de cet
équipement en environnements
dangereux.

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.

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.

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4 CompactLogix ControlNet Interface Module

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
publication 60664-1), at altitudes up to 2000 m (6561 ft) 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 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:

• Industrial Automation Wiring and Grounding Guidelines, for additional
installation requirements, Allen-Bradley publication 1770-4.1.

• NEMA Standards publication 250 and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure.

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CompactLogix ControlNet Interface Module 5

Prevent Electrostatic Discharge

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.

For additional information, refer to Industrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1.

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6 CompactLogix ControlNet Interface Module

Before You Begin

Plan for this minimum spacing from enclosure walls, wireways, and other
equipment.

Minimum Spacing

105 mm (4 in.)

90 mm

Power

24Vdc NOMIN A L

120W

OUT

(3.54 in.)

105 mm (4 in.)

Publication 1768-IN006A-EN-P - September 2007

90 mm

(3.54 in.)

31661-M

CompactLogix ControlNet Interface Module 7

Required System Components

Item Catalog Number or Size

1768 CompactLogix power supply 1768-PA3

1768 CompactLogix controller 1768-L4x

1769 end cap
Connects to the controller as either the last
module:

• without any 1769 series modules attached to
the controller (1768 series only).

• with a combination of 1768 series and 1769
series modules attached to the controller.

Serial cable to connect to a 1768 controller 1756-CP3

BNC connectors See Connect to a ControlNet Network.

DIN rail or mounting screws DIN rail Either of these sizes:

1769-ECR

• 35 x 7.5 mm
(EN 50 022 - 35 x 7.5)

• 35 x 15 mm

(EN 50 022 - 35 x 15)

Screws M4 or #8 panhead screws

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8 CompactLogix ControlNet Interface Module

Installing the Modules

ATTENTION

This product is grounded through the DIN rail to chassis ground. Use
zinc-plated yellow-chromate steel DIN rail to assure proper
grounding. The use of other DIN rail materials (for example,
aluminum or plastic) that can corrode, oxidize, or are poor
conductors, can result in improper or intermittent grounding. Secure
DIN rail to mounting surface approximately every 200 mm (7.87 in.)
and use end-anchors appropriately.

IMPORTANT

Do not use screws and DIN rail to mount the modules. It is possible

to break the mounting tabs off if you screw the modules to the panel
while they are on DIN rail.

Mount Modules with Screws

The steps in these instructions show how to mount the modules on DIN rail.
If you are using screws instead of DIN rail, make these changes to the
instructions.

1. Follow the steps in Mount the Module on the DIN Rail on page 10 to
connect the modules together.

2. Use the modules as a template and mark pilot holes on your panel.

3. Drill the pilot holes for M4 or #8 screws.

ATTENTION

Do not let metal to fall into modules while drilling. This could damage
the modules.

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CompactLogix ControlNet Interface Module 9

4. Use M4 or #8 screws to mount the modules to your panel with

1.16 Nm (10 lb-in) of torque.

5. Ground the module on a ground bus with a dedicated Earth-ground
stake.

6. Connect the ground bus to a functional Earth-ground on the DIN rail
or panel.

Refer to Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1, for additional information.

Install the DIN Rail

Mount the DIN rail in a suitable location.

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10 CompactLogix ControlNet Interface Module

Mount the Module on the DIN Rail

1

1768-CNB Module

TIP

2

1768-CNBR Module

(rear)

(front)

31646A-M

31646AB-M

Throughout this installation instruction the graphic used for the
module is the 1768-CNBR module.

b

a

(rear)

(front)

31647 -M

c

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CompactLogix ControlNet Interface Module 11

2

b

a

(rear)

(front)

31647 -M

c

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