Rockwell Automation 1788-CN2DN User Manual

Installation Instructions

ControlNet-to-DeviceNet Linking Device

Catalog Number 1788-CN2DN

Topic Page

Important User Information 2

About the CN2DN Linking Device 7

Parts List 8

Required System Components 9

Install the CN2DN Device 9

Mount the CN2DN Device on a DIN Rail 10

Mount the CN2DN Device on a Panel or Other Fixture 12

Wire a Power Supply to the CN2DN Device 13

Set the Node Addresses and Communication Rate 15

Connect the CN2DN Device to a ControlNet Network 16

Connect the CN2DN Device to a DeviceNet Network 17

Uninstall the CN2DN Linking Device 19

Interpret the LED Indicators 21

Troubleshoot the DeviceNet Network 29

Troubleshoot the ControlNet Network 46

Specifications 47

Additional Resources 51

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2 ControlNet-to-DeviceNet Linking Device

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
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.

) describes some important differences between solid state

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

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

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

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ControlNet-to-DeviceNet Linking Device 3

T

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.

AVERTISSEMEN

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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 ControlNet-to-DeviceNet Linking Device

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.

Compliance with the Essential Health and Safety Requirements has
been assured by compliance with EN 60079-15.

IMPORTANT

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

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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Environment and Enclosure

ControlNet-to-DeviceNet Linking Device 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 m (1.24 mi) 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.

Besides this publication, see:

Industrial Automation Wiring and Grounding Guidelines, 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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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.

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ControlNet-to-DeviceNet Linking Device 7

About the CN2DN Linking Device

Use following graphic to identify the components of your
ControlNet-to-DeviceNet linking device.

CN2DN Linking Device Components

Power Port and
Connector

DeviceNet Port and
Connector

DeviceNet Baud
Rate Switch

Network
Access Port

DeviceNet Node Address
Switches

LED Indicators

ControlNet Connection Ports

ControlNet Node Address
Switches

The DeviceNet connection port is located on the top left corner of the
device. See the section titled Connect the CN2DN Device to a
DeviceNet Network for more information.

Rotary switches to set the ControlNet node address, DeviceNet node
address, and the DeviceNet communication rate are located just
below the power and DeviceNet ports. See the section titled Uninstall
the CN2DN Linking Device for more information.

ATTENTION

The Network Access Port (NAP) is intended for local temporary
programming use only. It is not for permanent connection.

Use only specified NAP cable to the network.

Located below the rotary switches, the ControlNet network access
port allows for easy access of the ControlNet network using a laptop
and 1784-PCC card. Use 1786-CP connection cable to access the
ControlNet network using the NAP port.

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8 ControlNet-to-DeviceNet Linking Device

Two ControlNet connection ports are located on the bottom left side
of the device and provide the availability to connect a redundant
network. See the section titled Connect the CN2DN Device to a
ControlNet Network on page 16 for more information.

For more information about the power port and connector, see the
section titled Wire a Power Supply to the CN2DN Device on page 13.

For more information about the LED indicators, see the section titled
Interpret the LED Indicators on page 21.

Parts List

The following parts are included with the 1788-CN2DN linking
device.

1788-CN2DN Parts

1788-CN2DN

• One 1788-CN2CN linking device

• One power input connector

• One DeviceNet 10-pin linear connector

• Five 121 Ω resistors

• Two end anchors

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DeviceNet
Connector

Power

Connector

121 Ω Resistors

End Anchors

31670-M

ControlNet-to-DeviceNet Linking Device 9

Required System Components

In order to install your 1788-CN2DN device, you will need the
following system components.

• A 24V dc power supply
and

• A securely installed zinc-plated, yellow-chrome steel, DIN rail,
panel, or other suitable fixture.

Install the CN2DN Device

Complete the following tasks to install the CN2DN Linking Device.

• Mount the CN2DN Device on a DIN Rail

• Mount the CN2DN Device on a Panel or Other Fixture

• Wire a Power Supply to the CN2DN Device

• Uninstall the CN2DN Linking Device

• Set the Node Addresses and Communication Rate

• Connect the CN2DN Device to a ControlNet Network

• Connect the CN2DN Device to a DeviceNet Network

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10 ControlNet-to-DeviceNet Linking Device

Mount the CN2DN Device on a DIN Rail

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 and
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

The DIN rail must be properly grounded. See publication Industrial
Automation Wiring and Grounding Guidelines, publication 1770-4.1
for more information about DIN rail grounding.

Complete the following steps to mount the CN2DN device on a DIN
rail.

1. Align the CN2DN device over the DIN rail.

2. Press the CN2DN device onto the DIN rail until the DIN rail

latches lock the linking device in place.

Press Forward
and Down

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ControlNet-to-DeviceNet Linking Device 11

3. Clip each of the end anchors onto the DIN rail next to the

CN2DN device.

End Anchor onto DIN Rail

DIN Rail

Clip On

End Anchors Next to Device

Slide the Anchor
Against the
CN2DN Device

Tighten the Clamping Screws

Grounded DIN Rail

4. Slide each anchor against the device and tighten the screws on

the front of the end anchor.

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12 ControlNet-to-DeviceNet Linking Device

5. If you are mounting your CN2DN device in a high-vibration

area, insert screws (not included) into the holes of the
mounting tabs and tighten so that the screws are firmly
anchored into the panel behind the device.

Mount Tabs (Optional Use)

Ground Connection
(Optional) - For use if
DIN rail or panel is
not grounded. If
used, this tab must
be properly
connected to the
earth ground.

Mount Tabs (Optional Use)

You have completed mounting your CN2DN device on a DIN rail.

Mount the CN2DN Device on a Panel or Other Fixture

IMPORTANT

If mounting the CN2DN device to a panel, ensure that the panel is
conductive metal and properly grounded. Paint or other coatings
should be sanded from the panel to ensure the CN2DN device
makes sufficient conductive contact with the panel.

To mount the CN2DN device on a panel or other suitable fixture,
insert five screws (not included) through the module’s mounting tabs
and into the panel or fixture behind the module. Use screws long
enough to penetrate the panel or fixture for a secure mount.

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ControlNet-to-DeviceNet Linking Device 13

Wire a Power Supply to the CN2DN Device

ATTENTION

To comply with the CE Low Voltage Directive (LVD), power to this
equipment and DeviceNet must be powered from a source compliant
with the following: Safety Extra Low Voltage (SELV) or Protected Extra
Low Voltage (PELV).

To comply with UL restrictions, DeviceNet must be powered from a
source compliant with the following: Class 2 or Limited
Voltage/Current.

ATTENTION

24V dc power connection wiring length must be less than 10 m (32.81
ft).

The CN2DN device requires 18...30V dc input power provided by a
power supply that is separate from the DeviceNet network power
supply.

Complete the following steps to wire the power supply to the CN2DN
linking device.

1. Disconnect power to the power supply.

2. Locate the orange power connector.

Power Connector

Power Connector, Top

+ - + -

+ -

Power Supply

Wiring

Terminals

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Daisy Chain

to Device

Wiring

Ter mi na ls

(Optional Use)

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14 ControlNet-to-DeviceNet Linking Device

3. Loosen the two left-most terminal screws of the power

connector.

IMPORTANT

Do not connect more than two wires to any terminal.

4. Insert the bare power supply wire ends into the left-side

terminals of the power supply connector using the diagram as
a guide.

5. Tighten the two left terminal screws using 0.6 Nm (7 in-lb)

torque.

IMPORTANT

The power supply connector must be inserted into the CN2DN
device for power to reach any devices daisy chained from the
CN2DN power supply connector.

6. If you choose to connect another device to the power supply

connector of the CN2DN device, loosen the two terminal
screws on the right side of the connector.

7. Insert the bare device power wire ends into the two right

terminals using the diagram as a reference.

8. Tighten the two right terminal screws using 0.6 Nm (7 in-lb)

torque.

9. Insert the power supply connector into the power supply

connector port.

10. Reapply power to the dc power supply.

The LED indicators on the right side of the CN2DN device will
flash red to indicate power has been connected.

You have completed wiring the power supply to the CN2DN device.

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ControlNet-to-DeviceNet Linking Device 15

Set the Node Addresses and Communication Rate

Complete the following steps to set the node addresses using the
switches on the front of the CN2DN device.

CN2DN Device Switches

DeviceNet
Address
Switches

ControlNet

DeviceNet Baud
Rate Switch

1. To set the DeviceNet node address, use a small flat-head

screwdriver to turn the arrows of the switches towards the
desired node numbers.

Address
Switches

DeviceNet switches shown set to node 14.

2

0

8

2

4

0

6

8

MSD LSD

4

6

2. To set the DeviceNet communication rate, turn the DeviceNet

baud rate switch to the communication rate your DeviceNet
network is configured to, for example 125 K, 250 K, or 500 K.

3. To set the ControlNet node address, use a small Phillips-head

screwdriver to turn the arrows of the switches towards the
desired node numbers.

ControlNet switches shown set to node 26.

2

0

PGM

2

4

0

6

8

MSD LSD

4

6

You have completed setting the ControlNet and DeviceNet node
addresses and communication rate.

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16 ControlNet-to-DeviceNet Linking Device

Connect the CN2DN Device to a ControlNet Network

Complete the following steps to connect your CN2DN linking device
to the ControlNet network.

WARNING

If you connect or disconnect the communications 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.

1. Attach the BNC connector of the ControlNet cable to

ControlNet port A.

If using redundant

Attach the BNC
Connector of the
ControlNet tap to
ControlNet port A.

Main ControlNet
Network Cable

IMPORTANT

Redundant ControlNet
Network Cable (Optional)

Main ControlNet
Network Cable

Do not connect more than one ControlNet network to the CN2DN

cabling, attach the BNC
connector of the
ControlNet tap to
ControlNet port B.

device at a time. Connecting the CN2DN device to two networks at
one time will cause erratic behavior of the CN2DN device.

2. If you are connecting to redundant media, attach the BNC

connector of the other ControlNet cable to ControlNet port B.

The CN2DN linking device is now connected to the ControlNet
network.

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