Installation Instructions
ControlLogix ControlNet Interface Module
Catalog Numbers 1756-CNB, 1756-CNBR, Series E
Contents
For See Page
Important User Information 2
European Hazardous Location Approval 3
North American Hazardous Location Approval 4
Environment and Enclosure 5
Prevent Electrostatic Discharge 6
About the 1756-CNB and 1756-CNBR Series E Modules 6
Understand Standalone and Redundant Control 7
Before You Begin 8
Install or Remove the Module Under Power 14
Install the Module 15
Remove the Module 16
Connect the Module to the Network 17
Troubleshoot the Module 23
Interpret the Module Status Indicator and Display 24
ControlNet Network Channel Status Indicators 28
Specifications 30
Rockwell Automation Support BackCover
About This Publication
Use this document as a guide to install the ControlLogix ControlNet Bridge
module.
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2 ControlLogix ControlNet Interface Module
S
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 Interface 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 de fined 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 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
Publication
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
ControlLogix ControlNet Interface Module 5
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 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 publicatio n
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 requirement s pe rt aining to this equipment.
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6 ControlLogix ControlNet Interface Module
Prevent Electrostatic Discharge
ATTENTION
This equipment is sensitive to electrostatic disch ar ge , 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 appropr iate st atic-safe
packaging.
For additional information, refer to Industrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1.
About the 1756-CNB and 1756-CNBR Series E Modules
The 1756-CNB and 1756-CNBR Series E modules work for all nonredundant
ControlLogix applications.
IMPORTANT
Only the 1756-CNB and 1756-CNBR, Series D modules are
supported in ControlLogix Redundancy releases 8, 11, 13, and 15.
After a firmware upgrade to version 11.xx, Series E will be
supported in ControlLogix Redundancy releas e 15 or lat er.
You cannot upgrade a Series D module to a Series E module.
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ControlLogix ControlNet Interface Module 7
Understand Standalone and Redundant Control
You can use the 1756-CNB and 1756-CNBR Series E modules as standalone
or in firmware version 11.xx as redundant control. 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
Primary Chassis
Redundant Control
Chassis Pair
Secondary Chassis
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 modules in the same corresponding slots in their
respective redundant control chassis pair.
1756-SRM
1756-CNB
1756-CNB/CNBR
1756-CNBR
1756-SRM
1756-CNB
1756-CNB/CNBR
1756-CNBR
I/O Chassis
Publication
1756-CNB
1756-CNBR
ControlNet
Network
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8 ControlLogix ControlNet Interface Module
5
l)
Before You Begin
Before you install the module you need to make sure you:
• Know how to handle the module.
Refer to the section Prevent Electrostatic Discharge.
• Have all of the necessary components:
1756-CNB or 1756-CNBR
1786-TPR,1786 -TPS
1786-TPYR, or1786 -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-PB72/7
Power Supply
Small Screwdriver (optiona
• Know the type of ControlNet network:
There are two types of scheduled traffic networks for ControlNet:
single-keeper networks and multi-keeper networks.
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ControlLogix ControlNet Interface Module 9
All 1756-CNB and 1756-CNBR modules are keeper-capable, as listed.
1756-CNB and 1756-CNBR 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
D 7.xx Multi-keeper
E 10.xx Multi-keeper
E 11.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 ControlNet Modules in Logix5000 Control Systems User
Manual, publication CNET-UM001, for more information.
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10 ControlLogix ControlNet Interface Module
Identify Module Features
Refer to the figure Module Features to identify the hardware components of
the 1756-CNB and 1756-CNBR modules.
Module Features
Module Status
Alphanumeric
Display
ControlNet
Network
Channel Status
Indicators
Network
Access Port
Channel B
BNC Connector
(1756-CNBR only)
Front View
Module
Status
Indicator
Channel A
Channel A
BNC Connector
Network Address
Switches
Side View
Backplane
Connector
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ControlLogix ControlNet Interface Module 11
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; for modules in a redundant chassis, you must
specify the same address for the secondary module that you specified for the
corresponding primary module.
This module’s network
address is 23.
TIP
You can select an address of 01 to 99 for modules in a
standalone chassis or 01 to 98 for modules in redundant
chassis. 00 is an invalid ControlNet network address.
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12 ControlLogix ControlNet Interface Module
Prepare the Chassis for Module Installation
Before you install the module, you must install and connect a ControlLogix
chassis and power supply. A 4-slot chassis with a power supply is shown in the
Chassis and Power Supply.
figure
Chassis and Power Supply
Power
Supply
Chassis
For information on installing these products, refer to the table Chassis
Installation Publications.
Chassis Installation Publications
Chassis Type Chassis Installation Power Supply Power Supply
Installation
Series B
1756-A4
1756-A7
1756-A10
1756-A13
Publication
1756-IN080
1756-PA72/B Publication 1756-5.67
1756-PB72/B
1756-PA75/A Publication 1756-5.78
1756-PB75/A
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ControlLogix ControlNet Interface Module 13
Slot 0
Slot 2
Determine Module Slot Location
The figure Chassis Slot Numbering 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
1756-CNB and 1756-CNBR modules in the same chassis. You can install as
many modules as your power supply can accommodate (such as the number
for which the power supply is rated).
IMPORTANT
If you plan to install a redundant system, you must place the primary
and redundant modules in the same corresponding slot in their
respective chassis. For example, if you place a 1756-CNB R module
in slot 3 (from the left) in the primary chassis, you must also place
a 1756-CNBR module in slot 3 in the redundant chassis.
Chassis Slot Numbering
Slot 1
Power Supply
Slot 3
Chassis
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14 ControlLogix ControlNet Interface Module
Install or Remove the Module Under Power
You can install or remove the module while chassis power is applied if you
observe the following precautions.
WARNING
When you insert or remove the module while backplane power is on,
an electrical arc can occur. This could cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before
proceeding. Repeated electrical arcing causes excessive wear to
contacts on both the module and its mating connector. Worn contacts
may create electrical resistance that can affect module operation.
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Install the Module
Slide the module into
the chassis. Make
sure the module
backplane connector
properly connects to
the chassis
backplane
The module is properly installed when it is flush with the power
supply or other installed modules.
ControlLogix ControlNet Interface Module 15
Align the circuit board with
top and bottom guides in
the chassis.
Circuit
Board
ATTENTION
Do not force the module into the backplane connector. If you cannot
seat the module with firm pressure, check the alignment. Forcing the
module into the chassis can damage the backplane connector or the
module.
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16 ControlLogix ControlNet Interface Module
Remove the Module
Upper Tab
Push on the upper and lower tabs
to disengage them. Then slide
the module out of the chassis.
If you are replacing an existing module with an identical one, and you want to
resume identical system operation, you must install the new module with the
same ControlNet address in the same slot.
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ControlLogix ControlNet Interface Module 17
Connect the Module to the Network
You can connect the module to the ControlNet network using a tap
(1786-TPR, 1786-TPS, 1786-TPYR, or 1786-TPYS) or a network access cable
(1786-CP).
WARNING
If you connect or disconnect the communications cable with power
applied to this module or any device on the n etwork, an electrica l arc
can occur. This could cause an explosion in hazardous location
installations.
TIP
Use the 1786-CP cable for temporary connections, such as
programming software. For permanent connections, use a tap.
The following figure shows an example ControlNet network using redundant
media.
ControlNet Network
Node
ControlNet Link
ControlNet
Node
Redundant Media
(optional)
1756-CNBR Module
(in a 1756-A4 chassis)
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18 ControlLogix ControlNet Interface Module
When connecting the module to a ControlNet network, you should also refer
to the following documentation:
• ControlNet Coax Tap Installation Instructions, publication 1786-5.7
• ControlNet Cable System Planning and Installation Manual,
publication CNET-IN002
TIP
For network connections we recommend taps with a straight
connector (1786-TPS or 1786-TPYS) because of the location of the
BNC connectors on the bottom of the module.
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ControlLogix ControlNet Interface Module 19
D
2
Connect to the Network with a Tap
Perform the following steps to connect the module to the network using a tap.
1. Remove and save the dust caps from the ControlNet network taps.
ATTENTION
Do not allow any metal portions of the tap to contact any conductive
material. If you disconnect the tap from the module , place the dust
cap back on the straight or right-angle connector to prevent the
connector from accidentally contacting a metallic grounded surface.
Segment 1
ust Cap
Segment 2
1756-CNB - Segment 1
1756-CNBR - Segments 1 and
Dust Cap
2. Connect the tap’s straight or right-angle connector to the module’s
BNC connector.
If Your Node Suppor ts Connect The T ap’s Connecto r
nonredundant media
1756-CNB
redundant media • from trunkline A to channel A on the
(1)
While both channels are active, Rockwell recommends us ing channel A for nonred undant
media.
to the channel A connector on the module
(channel B on the 1756-CNBR is not used)
1756-CNBR
• from trunkline B to channel B on the
1756-CNBR
(1)
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20 ControlLogix ControlNet Interface Module
IMPORTANT
Segment 1
T o preven t ina dverte nt re versal of t he t ap co nnection s (re sulting in
incorrect status displays requiring troubleshooting), check the tap
drop cable for the label indicating the attached segment before
making your connection.
T o work properly, when you use modules in a redundant control
chassis pair, the primary and redundant partner modules must be
connected to the same network segment. If you are usin g redundant
media, connect the channel of each partner to the same netwo rk
segment.
Segment 2
A
Tap
Tap
B
A
Tap
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ControlLogix ControlNet Interface Module 21
3. Apply power to the module and check module status.
Use the following flowchart as a guide.
Turn the chas sis
power supply on.
Module
status
indicator
red?
Yes
Module performs a
power-on self-test
initialization.
INIT
Module
status
indicator
red?
Yes
INIT has failed, and the
module displays an
error message. Refer to
Troubleshoot section.
Replace the module.
See the
No
Troubleshoot
section.
OR
Initialization is
No
complete. The
status indicator
blinks green.
Channel A and B
indicators alternately
flash.
Module is functional
and operating.
Module
status
displays
OK?
Yes
Modules are in a
redundant control
chassis pair.
No
OK
A#xx
WAIT
SRM
Channel A and B
indicators display the
network condition as
listed on page 28.
See the
Troubleshoot
section.
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22 ControlLogix ControlNet Interface Module
1784-KTC, KTCx,
Connect a Programming Terminal to the Network with a 1786-CP Cable
To connect a programming terminal to the network using a 1786-CP cable,
you have the following options:
• Use a 1784-KTC, 1784-KTCx, or 1784-PCC communication card and
a 1786-CP cable:
1756-CNBR
PCIC, or PCC Card
1786-CP Cable
ControlNet Link
IMPORTANT
To work properly, the primary and redundant partner
module must be connected to the same network
segment. If you are using redundant media, connect the
channel of each partner to the same network segment.
• Use a 1770-KFC communication interface, a serial or parallel
connection, and a 1786-CP cable:
1756-CNBR
1770-KFC
1786-CP
Cable
Serial or Parallel
Connections
ControlNet Link
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ControlLogix ControlNet Interface Module 23
e
The 1786-CP cable can be plugged into any ControlNet network product’s
network access port (NAP) to provide programming capability on the
ControlNet network. A programming terminal connected through this cable
is counted as a node and must have a unique network address.
ATTENTION
Use a 1786-CP cable when connecting a prog ramming terminal to the
network through network access port (NAP). Using a commercially
available RJ-style cable could result in netwo rk fail ur e.
Troubleshoot the Module
The 1756-CNB and 1756-CNBR modules have the diagnostic indicators as
shown:
1756-CNB
1756-CNBR
ControlNet Channel Status
Indicators - See Page 28.
Channel A BNC Connector
Channel B BNC Connector
Module Status Display - Se
Pages 24 to 27.
Module Status Indicator See Pages 24 to 27.
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24 ControlLogix ControlNet Interface Module
OK
Interpret the Module Status Indicator and Display
The Module Status Indicator LED and Module Status Display table provide
diagnostic information.
Module Status Indicator LED and Module Status Display
LED Display
Cause Action
Off None The module is not
Red Msg
scrolls
BPA#
ERR
BPRX
ERR
BPIC
ERR
CNIC
communicating due to a power
supply fault or internal fault.
The module’ s network address is
(1)
set to 00, an invalid ControlNet
network address, or 99, an
invalid ControlNet network
address if you are using
redundant control. See footnote
at end of table.
The module detected a different
slot address from that latched in
at power-up. Excessive noise on
the backplane causes this error.
There are too many CRC errors
being generated by the multicast
backplane receiver, so the
backplane multicast receivers
have been shut off.
There is a hardware fault
within the module.
ERR
1. Check the power supply.
2. Check the cable connectors.
3. Make sure the module is firmly
seated in the chassis.
4. If the indicator remains off,
replace the module.
1. (Optional, see page 12.)
Turn chassis power supply off.
2. Remove the module from the
chassis.
3. Set the network address
switches to a unique address
(01-99, or 01-98 if redundant
control)
4. Install the module in the
chassis.
5. If off, turn chassis power
supply on.
Replace the chassis or module.
Replace the module.
Replace the module.
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ControlLogix ControlNet Interface Module 25
OK
Module Status Indicator LED and Module Status Display
LED Display
Cause Action
Red DUPL
NODE
RACK
ERR
STOP The module commanded to stop
WAIT
SRM
Flashing
Red
BOOT The module has invalid
ROM
UPDT
SNGL
KPR!
For a redundant system this may
be a temporary condition during
chassis switchover. Otherwise,
the module’s network address is
the same as another module’ s on
the link.
Cannot read backplane EEPROM,
or rack/slot address incorrect
functioning by the redundancy
module. This occurs when a
nonredundancy compliant
module is placed into a
redundant secondary chassis.
The module waiting for the
(2)
redundancy module to complete
power-up.
firmware.
Flash update is in progress. None required.
The module detected that it has
been connected to a ControlNet
1.5 (single-keeper) network.
1. (For redundant systems only.)
2. (Optional, see page 12.)
3. Remove the module from the
4. Set the network address
5. Install the module in the
6. If off, turn chassis power
Replace the chassis.
Remove nonredundancy compliant
module from redundant secondary
chassis and replace wit h
redundancy compliant module.
None required.
Update module firmware with
ControlFlash Update Utility.
Update the module’s firmware at
MAC ID 01 and reschedule the
network.
Wait 10 seconds; if the
condition persists, perform the
following steps:
Turn chassis power supply off.
chassis.
switches to a unique address
(01-99).
chassis.
supply on.
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26 ControlLogix ControlNet Interface Module
OK
Module Status Indicator LED and Module Status Display
LED Display
Cause Action
Green OK Normal operation None required
INIT The module is initializing.
BW
>MAX
CMPT
DSNP
PwDS
PwQg
PwQS
PwNS
Qfng
QS
SW
ERR
The module is receiving too
much network traffic and
connections are timing out. The
network bandwidth has been
exceeded.
(2)
The secondary module is
compatible with its partner.
(2)
The secondary module is
disqualified with no partner.
(2)
The module is primary with a
disqualified secondary partner.
(2)
The module is primary with a
qualifying secondary partner.
(2)
The module is primary with a
qualified secondary partner.
(2)
The module is primary with no
secondary partner.
(2)
The secondary module is
qualifying.
(2)
The secondary module is
qualified.
The node address switch
changed after power-up.
None (temporary condition).
If this happens frequently, add
another 1756-CNB or 1756-CNBR
and split the traffic between them.
None required.
Check corresponding slot of
primary chassis for type and
revision of module.
Check the type and revision of the
1756-CNB module.
Redundant system status. No
action required.
Check corresponding slot of
secondary chassis for correct
module.
Redundant system status. No
action required.
None required, but we recommend
that you either return switches to
their original settings or replace
the module, since this could
indicate a latent hardware
problem.
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ControlLogix ControlNet Interface Module 27
OK
Module Status Indicator LED and Module Status Display
LED Display
Cause Action
Flashing
Green
CNFG
ERR
NET
ERR
ControlNet network
configuration error.
Network cabling error or no
other active nodes on network.
Recheck configuration.
Re-check your network cabling
and make sure another node on
the network is active (online).
Green or
Off
(1)
If switches are set to 00 the display scrolls: “FAULT: ADDRESS SWITCHES = 00, ILLEGAL”
If switches are set to 99 in a redundant chassis, the display scrolls: “FAULT: ADDRESS SWITCHES =
99, ILLEGAL IN REDUNDANT SYSTEM”
(2)
Messages are for redundant control. These messages will be available in Series E firmware version
11.xx.
SO_1
SO_2
SO_3
SN_1
SN_2
SN_3
?Cpt
!Cpt
(2)
Old primary switchover phase 1
in progress.
(2)
Old primary switchover phase 2
in progress.
(2)
Old primary switchover phase 3
in progress.
(2)
New primary switchover phase 1
in progress.
(2)
New primary switchover phase 2
in progress.
(2)
New primary switchover phase 3
in progress.
(2)
the module has not determined
if it is compatible.
(2)
the module has determined that
it is not compatible.
If the display shows any message
for more than three seconds, then
the module failed during transition
from one redundancy phase to
another. Replace one or both
redundancy modules.
Replace the module with correct
type and revision.
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ControlNet Network Channel Status Indicators
The ControlNet network channel status indicators appear in one of the
following states:
• Steady - indicator is on continuously in the defined state.
• Alternating - the two indicators alternate between the two defined
states at the same time (applies to both indicators viewed together).
The two indicators are always in opposite states, out of phase.
• Flashing - the indicator alternates between the two defined states
(applies to each indicator viewed independent of the other). If both
indicators are flashing, they must flash together, in phase.
The ControlNet Network Channel Status Indicators table summarizes the
meanings of these states.
ControlNet Network Channel Status Indicators
Cause Action
and
AB
Off No power None or power up.
Steady red Faulted unit Cycle power or reset unit.
If fault persists, contact A-B
representative or distributor.
Alternating
red/green
Alternating red/off Incorrect node configuration Check network address and other
or
AB
Off Channel disabled Program network for redundant
Steady green Normal operation None
Flashing green/off Temporary errors None; unit will self-correct.
Self-test None
ControlNet network configuration
parameters.
Cause Action
media, if required.
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ControlLogix ControlNet Interface Module 29
ControlNet Network Channel Status Indicators
Cause Action
and
AB
Node is not configured to go on
line
Flashing red/off Media fault Check media. For example: broken
No other nodes present on
network
Flashing red/green Incorrect network configuration Cycle power or reset unit .
(1)
The configuration manager node is the node responsible for distributing ControlNet network
configuration data to all nodes on the network.
Make sure the configuration
manager node is present and
working and selected address is
not greater than selected UMAX
cables, loose connectors, missing
terminators.
Add other nodes to the network.
If fault persists, contact A-B
representative or distributor.
(1)
.
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30 ControlLogix ControlNet Interface Module
Specifications
ControlLogix ControlNet Interface Module 1756-CNB, 1756-CNBR, Series E
Attribute Value
Connectors
1756-CNB
1756-CNBR
Cable Quad shield RG-6 coaxial cable
Ground isolation Transformer
ControlNet network
communication rate
Diagnostics Yes
Weight
1756-CNB
1756-CNBR
Mounting type Chassis
Mounting location 1756 ControlLogix Chassis
Number of nodes, max 99
Slot width 1
Connections supported, max 64
Communication interface type Bridge
Device type Communication interface
Power dissipation 5.14 W
Thermal dissipation 17.5 BTU/hr
1 BNC connector for nonredundant media operation
1 NAP (RJ-45 8-pin with shield)
2 BNC connectors for redundant media operation
1 NAP (RJ-45 8-pin with shield)
5 M
0.260 kg (0.57 lb)
0.293 kg (0.64 lb)
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ControlLogix ControlNet Interface Module 31
ControlLogix ControlNet Interface Module 1756-CNB, 1756-CNBR, Series E
Attribute Value
Backplane current 970 mA @ 5.1 V
1.7 mA @ 24 V
Isolation voltage
(continuous-voltage withstand
rating)
Wiring category
(1)
Use this Conductor Category information for planning conductor routing. Refer to Industrial
Automation Wiring and Grounding Guidelines, publication 1770-4.1.
(1)
50V
Tested to 500V ac for 60 seconds
2 - on communications ports
Environmental Specifications ControlLogix ControlNet Interface Module
1756-CNB, 1756-CNBR, Series E
Attribute Value
Operational temperature IEC 60068-2-1 (Test Ad, Operating Cold),
Storage temperature IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Cold),
Relative humidity IEC 60068-2-30 (Test Db, Unpackaged Nonoperating Damp Heat):
Vibration IEC 60068-2-6 (Test Fc, Operating):
Operating shock IEC 60068-2-27 (Test Ea, Unpackaged Shock):
Nonoperating shock IEC 60068-2-27 (Test Ea, Unpackaged Shock):
Emissions CISPR 11:
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
0…60 °C (32…140 °F)
IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat),
IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal Shock):
-40…85 °C (-40…185 °F)
5…95% noncondensing
2 g @ 10…500 Hz
30 g
50 g
Group 1, Class A
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32 ControlLogix ControlNet Interface Module
Environmental Specifications ControlLogix ControlNet Interface Module
1756-CNB, 1756-CNBR, Series E
Attribute Value
ESD immunity IEC 61000-4-2:
Radiated RF immunity
Series E
EFT/B immunity IEC 61000-4-4:
Surge transient immunity IEC 61000-4-5:
Conducted RF immunity IEC 61000-4-6:
Enclosure type rating None (open-style)
6 kV contact discharges
8 kV air discharges
IEC 61000-4-3:
10 V/m with 1 kHz sine-wave 80%AM from 30…2000 MHz
10 V/m with 200 Hz 50% Pulse 100%AM at 900 MHz
10 V/m with 200 Hz 50% Pulse 100%AM at 1890 MHz
1 V/m with 1 kHz sine-wave 80%AM from 2000 MHz…2700 MHz
±2 kV at 5 kHz on communications ports
±2 kV line-earth(CM) on communications ports
10V rms with 1 kHz sine-wave 80%AM from 150 kHz…80 MHz
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ControlLogix ControlNet Interface Module 33
Certifications 1756-CNB Series E and 1756-CNBR, Series E
Certification Value
Certifications
(when product is marked)
UL UL Listed Industrial Control Equipment
(1)
cULus UL Liste d for Class I, Division 2 Group A,B,C,D
Hazardous Locations, certified for U.S. and Canada
CSA CSA Certified Process Control Equipment
CSA CSA Certified Process Control Equipment for Class I,
Division 2 Group A,B,C,D Hazardous Locations
FM FM Approved Equipment for use in Class I Division 2
Group A,B,C,D Hazardous Locations
CE European Union 89/336/EEC EMC Directive, compliant
with:
EN 50082-2; Industrial Immunity
EN 61326; Meas./Control/Lab., Industrial
Requirements
EN 61000-6-2; Industrial Immunity
EN 61000-6-4; Industrial Emissions
EN 61131-2; Programmable Controllers (Clause 8, Zone
A & B)
C-TickAustralian Radiocommunications Act, compliant with:
AS/NZS CISPR 11; Industrial Emissions
EEx European Union 94/9/EC ATEX Directive, compliant
with:
EN 50021; Potentially Explosive Atmospheres,
Protection “n” (Zone 2)
CI ControlNet Int'l conformance tested to ControlNet
network specifications
(1)
See the Product Certification link at www.ab.com for Declarations of Conformity,
Certificates, and other certification details.
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34 ControlLogix ControlNet Interface Module
Additional Resources
Publication Title Publication Number
Industrial Automation Wiring and Grounding Guidelines 1770-4.1
ControlNet Modules in Logix5000 Control Systems CNET-UM001
ControlLogix Chassis Installation Instructions 1756-IN080
ControlLogix Power Supplies Installation Instructions 1756-IN078
ControlLogix Power Supplies Installation Instructions 1756-IN596
ControlNet Coax Tap Installation Instructions 1786-5.7
ControlNet Coax Media Planning and Installation Guide CNET-IN002
ControlNet Fiber Media Planning and Installation Guide CNET-IN001
ControlLogix is a trademark of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
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Notes:
ControlLogix ControlNet Interface Module 35
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Rockwell Automation Support
Rockwell Automation provides technical information on the web to assist you in using
its products. At http://support.rockwellautomation.com, you can find technical
manuals, a knowledge base of FAQs, technical and application notes, sample code and
links to software service packs, and a MySupport feature that you can customize to
make the best use of these tools.
For an additional level of technical phone support for installation, configuration and
troubleshooting, we offer TechConnect Support programs. For more information,
contact your local distributor or Rockwell Automation representative, or visit
http://support.rockwellautomation.com.
Installation Assistance
If you experience a problem with a hardware module within the first 24 hours of
installation, please review the information that's contained in this manual. You can also
contact a special Customer Support number for initial help in getting your module up
and running:
United States 1.440.646.3223 Monday – Friday, 8am – 5pm EST
Outside United States Please contact your local Rockwell Automation representative for any
New Product Satisfaction Return
Rockwell tests all of its products to ensure that they are fully operational when shipped
from the manufacturing facility. However, if your product is not functioning and needs
to be returned:
United States Contact your distributor. You must provide a Customer Support case number
Outside United States Please contact your local Rockwell Automation representative for return
technical support issues.
(see phone number above to obtain one) to your distributor in order to
complete the return process.
procedure.
Publication 1756-IN604A-EN-P - February 2006 PN 953002-64
Copyright © 2006 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
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