Rockwell Automation 1756-CN2R Installation Instructions

Installation Instructions

ControlLogix ControlNet Bridge Module

Catalog Numbers 1756-CN2, 1756-CN2R

Inside . . .

For See Page

About This Publication 1
Important User Information 2
European Hazardous Location Approval 3
North American Hazardous Location Approval 4
Environment and Enclosure 5
Preventing Electrostatic Discharge 6
About the ControlLogix ControlNet Bridge Module 6
Before You Begin 7
Install the Module 11
Troubleshoot the Modules 19
Specifications 25
Additional Resources 29

About This Publication

Use this document as a guide to install the ControlLogix ControlNet
bridge module.

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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 liab le for indir ect or consequen tial damage s
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 th is manual, in whole or in part, without writ t en p e r mission 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 practic es or circu mstances th at can cause an explosion in
a hazardous environment, which may lead to personal injury or death, property
damage, or economic loss.

IMPORTANT

ATTENTION

HOCK HAZARD

BURN HAZARD

Publication

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, and recognize the consequences.

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

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

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ControlLogix ControlNet Bridge Module 3

European Hazardous Location Approval

European Zone 2 Certification
(The following applies when the product bears the EEx Marking.)
This equipment is intended for use in potentially explosive

atmospheres as defined by European Union Directive 94/9/EC.
The LCIE (Laboratoire Central des Industries Electriques) certifies that

this equipment 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 potentially explosive
atmospheres, given in Annex II to this Directive. The examination
and test results are recorded in confidential report No. 28 682 010.

Compliance with the Essential Health and Safety Requirements has
been assured by compliance with EN 50021.

IMPORTANT

This equipment is not resistant to sunlight or other
sources of UV radiation.

The secondary of a current transformer shall not be
open-circuited when applied in Class I, Zone 2
environments.

Equipment of lesser Enclosure Type Rating must be
installed in an enclosure providing at least IP54
protection when applied in Class I, Zone 2
environments.

This equipment shall be used within its specified ratings
defined by Allen-Bradley.

Provision shall be made to prevent the rated voltage
from being exceeded by transient disturbances of more
than 40% when applied in Class I, Zone 2 environments.

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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 Divisi on 2 Groups A, B,
C, D, Hazardous Locations and nonhazardous
locations only. Each product is supplied with
markings on the rating nameplate indic ating 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

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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.

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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.

AVERTISSEMEN

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.

Environment and Enclosure

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ControlLogix ControlNet Bridge Module 5

ATTENTIO

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.

NOTE: 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 Industrial Automation Wiring and
Grounding Guidelines, Allen-Bradley publication
1770-4.1, for additional installation requirements
pertaining to this equipment.

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Preventing Electrostatic Discharge

ATTENTIO

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.

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

About the ControlLogix ControlNet Bridge Module

We designed the enhanced ControlLogix ControlNet module for
applications that require higher capacity, and we recommend that
you use this module with ControlLogix controllers to:

• expand systems for twice as much I/O control.

• effectively double the amount of Produce/Consume tags that

can be transferred between controllers.

• speed up existing applications to run faster.

Use the 1756-CN2 ControlLogix ControlNet module for stand-alone
applications only. Applications requiring controller redundancy must
use the 1756-CNB module.

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ControlLogix ControlNet Bridge Module 7

5

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Before You Begin

Before you install the module, make sure you:

• know how to handle the module (see Preventing Electrostatic
Discharge).

• know the type of ControlNet network.

There are two types of scheduled traffic networks for
ControlNet: single-keeper networks and multi-keeper
networks. The 1756-CN2 and 1756-CN2R bridges are
multi-keeper capable.

You must match the keeper to the type of network. Refer to
the ControlNet Modules in Logix5000 Control Systems User
Manual, publication CNET-UM001, for more information.

Parts List

You need all of the components shown.

1756-CN2 or 1756-CN2R

1756-A4, 1756-A7, 1756-A10,
1756-A13, or 1756-A17

1756-PA72/75 or 1756-PB72/7

Power Supply

1786-TPR, -TPS

-TPYR, or -TPYS

(1)

1786-TPS or 1786-TPYS taps recommended for network connections.

(1)

1786-CP (Temporary
Network Connections)

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Small Screwdrive
(Optional)

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or

C
B
(
o

Identify Module Features

Refer to this figure to identify the hardware components of the
1756-CN2 and 1756-CN2R bridge modules.

Network Address
Switches (not shown)
See page 9.

Module Status
Alphanumeric
Display

ControlNet
Channel Status
Indicators

Network
Access Port
(NAP)

Module
Status
Indicator

Backplan
Connect

hannel B
NC Connector

1756-CN2R

nly)

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Front View

Channel A

Channel A
BNC Connector

Side View

ControlLogix ControlNet Bridge Module 9

side of module

front of module

top of module

Set the Module’s Network Address Switches

Use your fingers or a small screwdriver to set the module’s network
address switches. For modules in a standalone chassis, you must
specify a unique ControlNet network address. You can select an
address of 01 to 99 for modules in a standalone chassis. Note that 00
is an invalid ControlNet address.

This module’s network
address is 23.

Prepare the Chassis for Module Installation

Before you install the 1756-CN2 module, you must install and connect
a ControlLogix chassis and power supply. A 4-slot chassis with a
power supply is shown below.

Power
Supply

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Chassis

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10 ControlLogix ControlNet Bridge Module

For information about installing these products, refer to the
publications listed in this table.

Chassis Type

Series B: 1756-A4, 1756-A7,
1756-A10, 1756-A13, 1756-A17

Chassis
Installation

Publication
1756-IN080

Power Supply

1756-PA72/C Publication
1756-PB72/C
1756-PA75/B Publication
1756-PB75/B

Power Supply
Installation

1756-IN078

1756-IN596

These modules are compatible with all versions of chassis and power
supplies.

Determine Module Slot Location

This figure shows chassis slot numbering in a 4-slot chassis. Slot 0 is
the first slot and is always the leftmost slot in the rack (the first slot to
the right of the power supply). You can use any size ControlLogix
chassis and install the module in any slot. You can also install
multiple bridge modules in the same chassis. You can install as many
modules as your power supply can accommodate (that is, the
number for which the power supply is rated).

Slot 1

Slot 2

Slot 3

Slot 0

Power Supply

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Chassis

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