Installation Instructions
ControlLogix ControlNet Bridge
(Catalog Numbers 1756-CNB, -CNBR)
Series C and D
Use this document as a guide to install the ControlLogix
ControlNet Bridge module.
For Information About See page
Important User Information 2
Understanding Compliance to European Union Directive 4
Preventing Electrostatic Discharge 5
Understanding Standalone and Redundant Control 6
Prepare to Install the Module 7
Identify Module Features 9
Prepare the Chassis for Module Installation 11
Set the Module’s Network Address Switches 10
Prepare the Chassis for Module Installation 11
Prepare the Chassis for Module Installation 11
Install the Module 14
Connecting to the Network Using a Tap 17
Connecting a Programming Terminal to the Network Using 1786-CP Cable 20
Troubleshooting 22
Module Status Indicator and Display 23
ControlNet Channel Status Indicators 26
Hazardous Location information 28
Module Specifications 30
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Important User Information
Because of the variety of uses for the products described in this
publication, those responsible for the application and use of this
control equipment must satisfy themselves that all necessary steps
have been taken to assure that each application and use meets all
performance and safety requirements, including any applicable laws,
regulations, codes and standards.
The illustrations, charts, and layout examples shown in this guide are
intended solely for purposes of example. Since there are many
variables and requirements associated with any particular installation,
Allen-Bradley does not assume responsibility or liability (to include
intellectual property liability) for actual use based upon the examples
shown in this publication.
Allen-Bradley publication SGI-1.1, Safety Guidelines for the
Application, Installation and Maintenance of Solid-State Control
(available from your local Allen-Bradley office), describes some
important differences between solid-state equipment and
electromechanical devices that should be taken into consideration
when applying products such as those described in this publication.
Reproduction of the contents of this copyrighted publication, in
whole or part, without written permission of Rockwell Automation, is
prohibited.
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Throughout this manual we use the following notes to make you
aware of safety considerations:
3
WARNING
Identifies information about practices or
circumstances that have the potential to create an
explosion hazard.
!
ATTENTION
Identifies information about other practices or
circumstances that can lead to personal injury or
death, property damage or economic loss.
!
Warning and Attention statements help you to:
• identify a hazard
• avoid a hazard
• recognize the consequences
We use the following note to call attention to critical information:
IMPORTANT
Identifies information that is critical for successful
application and understanding of the product.
Change bars are used to indicate information that has changed or
been added since the previous version of these instructions.
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Understanding Compliance to European Union Directive
If this product bears the CE marking, it is approved for installation
within the European Union and EEA regions. It has been designed
and tested to meet the following directives.
EMC Directive
This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standards, in
whole or in part, documented in a technical construction file:
• EN 50081-2 EMC - Generic Emission Standard, Part 2 Industrial Environment
• EN 50082-2 EMC - Generic Immunity Standard, Part 2 Industrial Environment
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low
Voltage, by applying the safety requirements of EN 61131-2
Programmable Controllers, Part 2 - Equipment Requirements and
Tests.
For specific information required by EN 61131-2, see the appropriate
sections in this publication, as well as the following Allen-Bradley
publications:
• Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
• Automation Systems Catalog, publication B113
Open style devices must be provided with environmental and safety
protection by proper mounting in enclosures designed for specific
application conditions. See NEMA Standards publication 250 and IEC
publication 529, as applicable, for explanations of the degrees of
protection provided by different types of enclosure.
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Enclosure and Environmental Requirements Specific To This Product
This product must be mounted within a suitable system enclosure to
prevent personal injury resulting from accessibility to live parts. The
interior of this enclosure must be accessible only by the use of a tool.
This industrial control equipment is intended to operate in a Pollution
Degree 2 environment, in overvoltage category II applications, (as
defined in IEC publication 664A) at altitudes up to 2000 meters
without derating.
Preventing Electrostatic Discharge
The 1756-CNB and 1756-CNBR modules are sensitive to electrostatic
discharge.
ATTENTION
!
Electrostatic discharge can damage integrated
circuits or semiconductors if you touch
backplane connector pins. Follow these
guidelines when you handle the module:
• Touch a grounded object to discharge static
potential
• Wear an approved wrist-strap grounding
device
• Do not touch the backplane connector or
connector pins
• Do not touch circuit components inside the
module
• If available, use a static-safe work station
• When not in use, keep the module in its
static-shield bag
For additional information refer to publication 1770-4.1, Industrial
Automation Wiring and Grounding Guidelines.
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Understanding Standalone and Redundant Control
You can use both the 1756-CNB and 1756-CNBR modules either
standalone or in a redundant control chassis pair. For standalone
control, only one set of modules is required. For redundant control,
two ControlLogix chassis are populated with identical pairs of
modules called partners. The chassis that performs active control is
called the primary chassis and the modules in the chassis are called
primary modules. The other chassis is called the secondary chassis
and the modules in the chassis are called secondary modules. These
installation instructions discuss both standalone and redundant
control; read them carefully to distinguish the procedures and
requirements for each type of control.
IMPORTANT
If you use redundant control, you must select the
same ControlNet Network address for each set of
partner modules. You must also place the partner
module(s) in the same corresponding slot(s) in
their respective redundant control chassis pair.
Primary Chassis
Redundant Control
Chassis Pair
Secondary Chassis
I/O Chassis
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1756-SRM
1756-CNB/CNBR
1756-SRM
1756-CNB/CNBR
1756-CNB/CNBR
ControlNet
Network
Prepare to Install the Module
Before you install the module make sure you:
1. Know how to handle the module (see page 5)
2. Have all of the necessary components shown below:
7
1756-CNB or 1756-CNBR
1786-TPR, -TPS
-TPYR, or -TPYS
(1)
1786-TPS or 1786-TPYS taps recommended for network connections.
1756-A4, 1756-A7, 1756-A10,
1756-A13, or 1756-A17
(1)
1786-TP (temporary
network connections)
1756-PA72/75 or 1756-PB72/75
small screwdriver (optional)
3. Know the type of ControlNet network:
There are two types of scheduled traffic networks for
ControlNet: single-keeper networks and multi-keeper
networks.
power supply
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All 1756-CNB and 1756-CNBR modules are keeper-capable, as
listed in the following table.
CNB(R) Series Major/Minor Revision Keeper Type
A 1.xx Single-Keeper
B 2.xx Multi-Keeper
C 3.xx Single-Keeper
C 4.xx Multi-Keeper
D 5.xx Multi-Keeper
You must match the keeper to the type of network, or upgrade
the firmware of the module at MAC ID 01 to be multi-keeper
capable. Refer to the ControlLogix ControlNet Interface
Module User Manual, publication 1756-6.5.3, for more
information.
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Identify Module Features
Refer to the following figure to identify the hardware components of
the 1756-CNB and CNBR modules.
Network Address
Module Status
Alphanumeric
Display
ControlNet
Channel Status
Indicators
Network
Access Port
Channel B
BNC Connector
(1756-CNBR
only)
Front View
Module
Status
Indicator
Channel A
Channel A
BNC Connector
Switches (not shown)
See page
Side View
Backplane
Connector
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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; for modules in a
redundant chassis, you must specify the same address for the
secondary module that you specified for the corresponding primary
module. You can select an address of 01 to 99 for modules in a
standalone chassis or 01 to 98 for modules in redundant chassis. Note
that OO is an invalid ControlNet address.
side of module
front of module
This module’s network
address is 23.
top of module
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