AB Quality CompactLogix 1768-CNB User manual

Publication 1768-IN006A-EN-P - September 2007
Installation Instructions
CompactLogix ControlNet Interface Module
Catalog Numbers 1768-CNB, 1768-CNBR
About This Publication
Use this document as a guide to install the CompactLogix ControlNet Bridge
Interface Module.
Topic 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

2CompactLogix ControlNet Interface Module
Publication 1768-IN006A-EN-P - September 2007
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 Identifies information that is critical for successful application and understanding of
the product.
ATTENTION 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.
SHOCK HAZARD
Labels may be on or inside the equipment, for example, a drive or motor, to alert
people that dangerous voltage may be present.
BURN HAZARD
Labels may be on or inside the equipment, for example, a drive or motor, to alert
people that surfaces may reach dangerous temperatures.

CompactLogix ControlNet Interface Module 3
Publication 1768-IN006A-EN-P - September 2007
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 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.
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.
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.
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.
WARNING AVERTISSEMENT

4CompactLogix ControlNet Interface Module
Publication 1768-IN006A-EN-P - September 2007
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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Publication 1768-IN006A-EN-P - September 2007
Prevent Electrostatic Discharge
For additional information, refer to Industrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1.
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.

6CompactLogix ControlNet Interface Module
Publication 1768-IN006A-EN-P - September 2007
Before You Begin
Plan for this minimum spacing from enclosure walls, wireways, and other
equipment.
Minimum Spacing
31661-M
Power
OUT
24Vdc NOMIN AL 120W
90 mm
(3.54 in.)
105 mm (4 in.)
90 mm
(3.54 in.)
105 mm (4 in.)

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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.
1769-ECR
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:
•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

8CompactLogix ControlNet Interface Module
Publication 1768-IN006A-EN-P - September 2007
Installing the Modules
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 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.
ATTENTION Do not let metal to fall into modules while drilling. This could damage
the modules.

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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.

10 CompactLogix ControlNet Interface Module
Publication 1768-IN006A-EN-P - September 2007
Mount the Module on the DIN Rail
TIP Throughout this installation instruction the graphic used for the
module is the 1768-CNBR module.
(front)
(rear)
1
1768-CNB Module 1768-CNBR Module
31646A-M 31646AB-M
a
b
31647 -M
(front)
(rear)
2
c

CompactLogix ControlNet Interface Module 11
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a
b
31647 -M
(front)
(rear)
2
c

12 CompactLogix ControlNet Interface Module
Publication 1768-IN006A-EN-P - September 2007
Mount the Power Supply on the DIN Rail

CompactLogix ControlNet Interface Module 13
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Mount the I/O Modules on the DIN Rail
1
31649-M
a
bd
c
a
b
c
31650-M
2

14 CompactLogix ControlNet Interface Module
Publication 1768-IN006A-EN-P - September 2007
Connect the Module
You can connect the module to the ControlNet network by using a tap
(catalog number 1786-TPR, 1786-TPS, 1786-TPYR, or 1786-TPYS) or a
network access cable (catalog number 1786-CP).
Refer to the ControlNet Coax Media Planning and Installation Guide,
publication CNET-IN002, for additional information.
WARNING If you connect or disconnect the communication cable with power
applied to this module or any device on the network, 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.
TIP Use the 1786-CP cable for temporary connections, such as
programming software. For network connections and permanent
connections, we recommend taps with a straight connector
(catalog number 1786-TPS or 1786-TPYS) because of the location of
the BNC connectors on the bottom of the module.

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Publication 1768-IN006A-EN-P - September 2007
Set the Network Address Switches
Use a small screwdriver to set the module’s network address switches. You
must specify a unique ControlNet network address. You can select an address
of 01…99.
Network Address Switches
05 06
6
8
7
07
9
0
4
3
2
1
5
08
09
00
01
02
03
04
NETWORK
ADDRESS
31651- M
05 06
6
8
7
07
9
0
4
3
2
1
5
08
09
00
01
02
03
04
NETWORK
ADDRESS
Side of Module
Front of Module
This module’s network
address is 99.

16 CompactLogix ControlNet Interface Module
Publication 1768-IN006A-EN-P - September 2007
Connect to a ControlNet Network
The 1768-CNB and 1768-CNBR modules have a network access port (NAP)
available. The most common and easiest way to connect to the network is by
using the a ControlNet tap. Perform the following steps to connect the
module to the network by using a tap.
1. Remove and save the dust caps from the ControlNet network taps.
2. Connect the tap’s straight or right-angle connector to the module’s
BNC connector.
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.
If your node supports Connect the tap’s connector
Nonredundant media
1768-CNB module
To the channel A connector on the module
(channel B on the 1768-CNBR module is not used)(1)
(1) While both channels are active, we recommend using channel A for non-redundant media.
Redundant media •From trunkline A to channel A on the 1768-CNBR module
•From trunkline B to channel B on the 1768-CNBR module
Dust Cap
Segment 1 Segment 2
Dust Cap
1768-CNBR Segments 1 and 2
1768-CNB Segment 1

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IMPORTANT On 1768-CNBR installations, make sure the correct network is
connected to the correct tap connection. Reversing the tap
connections will result in incorrect status display.
When you are using redundant media, connect the channel of each
partner to the same network segment.
Segment 2
Tap Tap
05 06
6
8
7
07
9
0
4
3
2
1
5
08
09
00
01
02
03
04
NETWORK
ADDRESS
31653- M
AB
05 06
6
8
7
07
9
0
4
3
2
1
5
08
09
00
01
02
03
04
NETWORK
ADDRESS
A
Segment 1
Tap

18 CompactLogix ControlNet Interface Module
Publication 1768-IN006A-EN-P - September 2007
Connecting a Laptop Computer to the Network with a 1784-PCC Card
The 1784-PCC1 cable can be connected from a laptop computer with a
1784-PCC card into any ControlNet product’s network access port (NAP) to
provide access to an existing ControlNet network. A laptop computer
connected through this cable is counted as a node and must have a unique
network address (MAC ID) less than or equal to the maximum unscheduled
node (UMAX).
WARNING The NAP is intended for temporary local-programming purposes only
and not intended for permanent connection. If you connect or
disconnect the NAP cable with power applied to this module or any
device on the network, 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.
31654a-M
1784-PCC1 Cable
ControlNet Link
1784-PCC Card
1768-CNBR Module

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Connecting a Desktop Computer to the Network with a 1786-CP Cable
The 1786-CP cable can be connected from a desktop computer with either a
1784-PCIC or 1784-PCICS card into any ControlNet product’s network
access port (NAP) to provide access to an existing ControlNet network. A
desktop computer connected through this cable is counted as a node and
must have a unique network address (MAC ID) less than or equal to the
maximum unscheduled node (UMAX).
WARNING The NAP is intended for temporary local-programming purposes only
and not intended for permanent connection. If you connect or
disconnect the NAP cable with power applied to this module or any
device on the network, 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.
ATTENTION Use a 1786-CP cable when connecting a programming terminal to the
network through the NAP. Using a commercially available RJ-style
cable could result in network failure.
31654- M
1786-CP Cable
ControlNet Link
1784-PCIC or 1784-PCICS
1768-CNBR Module

20 CompactLogix ControlNet Interface Module
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Connecting a Desktop Computer Directly to the ControlNet Network
A 1786-TPR, 1786-TPS, 1786-TPYR, or 1786-TPYS cable can be connected
from a desktop computer with either a 1784-PCIC or 1784-PCICS card
directly to an existing ControlNet network. A desktop computer connected
through this cable is counted as a node and must have a unique network
address (MAC ID) less than or equal to the maximum unscheduled node
(UMAX).
When connecting the module to a ControlNet network, you should also refer
to the following documentation:
•ControlNet Coax Taps Installation Instructions, publication
1786-IN007
•ControlNet Coax Media System Planning and Installation Manual,
publication CNET-IN002
TIP For network connections, we recommend taps with a straight
connector (catalog number 1786-TPS or 1786-TPYS) because of the
location of the BNC connectors on the bottom of the module.
ATTENTION If a SoftLogix5800 processor is running on the computer containing
the 1784-PCIC or 1784-PCICS card, do not use the 1786-CP cable to
connect the card to the ControlNet network. Instead, connect the
card directly to the ControlNet network.