Installation Instructions
WARNING
IMPORTANT
ATTENTION
ATTENTION
WARNING
WARNING
WARNING
ATTENTION
ATTENTION
FLEX I/O DeviceNet Adapter Module
1794-ADN Series C and 1794-ADNK Series C
(Modules with a K in the last position of the catalog number are
conformally coated to meet noxious gas requirements of ISA/ANSI-71.040
1985 Class G3 Environment.)
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
local Rockwell Automation sales office or online at
http://literature.rockwellautomation.com
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 we use notes to make you aware of safety considerations.
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.
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
recognize the consequence
) describes some important differences
available from your
Environment and Enclosure
This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications (as
defined in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without
derating.
This equipment is considered Group 1, Class A industrial
equipment according to IEC/CISPR 11. Without appropriate
precautions, there may be difficulties with electromagnetic
compatibility in residential and other environments due to
conducted and radiated disturbances.
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,
Rockwell Automation publication 1770-4.1,
installation requirements.
NEMA Standard 250 and IEC 60529, as applicable, for
explanations of the degrees of protection provided by
different types of enclosure.
When you insert or remove the module while backplane power is
on, or connect or disconnect the DeviceNet 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.
If you connect or disconnect wiring while the field side 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.
for additional
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.
Be sure that power is removed or the area is nonhazardous before
proceeding.
FLEX I/O 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 (7.8 in.) and use end-anchors
appropriately.
Do not remove or replace an adapter while power is applied.
Interruption of the backplane can result in unintentional operation
or machine motion.
Publication 1794-IN099C-EN-P - May 2010
2
ATTENTION
ATTENTION
ATTENTION
WARNING
WARNING
AVERTISSEMENT
44976
To comply with the CE Low Voltage Directive (LVD), this equipment
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, this equipment must be powered
from a source compliant with the following:
Class 2 or Limited Voltage/Current.
Preventing Electrostatic Discharge
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.
European Hazardous Location Approval
The following adapters are European Zone 2 approved:
1794-ADN and -ADNK series C adapters.
European Zone 2 Certification (The following applies when the product
bears the Ex Marking)
This equipment is intended for use in potentially explosive atmospheres as defined
by European Union Directive 94/9/EC and 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 Zone 2 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 and EN 60079-0.
Observe the following additional Zone 2 certification
requirements.
This equipment is not resistant to sunlight or other sources
of UV radiation.
This equipment must be installed in an enclosure providing
at least IP54 protection when applied in Zone 2
environments.
This equipment shall be used within its specified ratings
defined by Rockwell Automation.
Provision shall be made to prevent the rated voltage from
being exceeded by transient disturbances of more than 40%
when applied in Zone 2 environments.
This equipment must be used only with ATEX certified
Rockwell Automation Terminal Bases.
Secure any external connections that mate to this equipment
by using screws, sliding latches, threaded connectors, or
other means provided with this product.
Do not disconnect equipment unless power has been
removed or the area is known to be nonhazardous.
North American Hazardous Location Approval
The following adapter is North American Hazardous Location approved:
1794-ADN Series C and 1794-ADNK Series C adapters.
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 hazardou s 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.
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. Chaq ue
produit est livré avec des marquages sur sa plaque
d'identification qui indiquent le code de
température pour les environnements dan gereux.
Lorsque plusieurs produits sont combi nés 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.
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.
DeviceNet Adapter, Cat. No. 1794-ADN/C and 1794-ADNK/C
8
1
2
3
4
7
6
5
Component Identification
1 DeviceNet Adapter Module 5 DeviceNet Node selection
2 Indicators 6 +24V DC connections
3 Wiring label 7 24V common connections
4 DeviceNet network cable
(plug-in, screw-secured)
thumbwheel switches
8 Flexbus connector
Installing Your DeviceNet Adapter Module
Publication 1794-IN099C-EN-P - May 2010
3
ATTENTION
44977
44978
ATTENTION
ATTENTION
44979
44980
7. Complete the adapter mounting as shown below.
A
B
C
During mounting of all devices, be sure that all debris (metal chips,
wire strands, etc.) is kept from falling into the module. Debris that
falls into the module could cause damage on power up.
Push down and in at the same time to lock the adapter to the DIN
rail.
If the adapter does not lock in place, use a screwdriver or similar
device to move the locking tab down while pressing the adapter
flush onto the DIN rail, and release the locking tab to lock the
adapter module in place. If necessary, push up on the locking tab
to lock.
C
Mounting on a DIN rail before installing the Terminal Base Units
1. Position the DeviceNet adapter module (A) on an IEC standard,
(35 x 7.5 x 1 mm) top-hat DIN rail (B), at a slight angle.
2. Hook the lip on the rear of the adapter onto the top of the DIN
rail, and rotate the adapter onto the rail.
3. Press the adapter module down onto the DIN rail until flush.
Locking tab C will snap into position and lock the adapter to the
DIN rail.
4. If the adapter does not lock in place, use a screwdriver or similar
device to move the locking tab down while pressing the adapter
flush onto the DIN rail, and release the locking tab to lock the
adapter in place. If necessary, push up on the locking tab to lock.
5. Connect the adapter wiring as shown under “Connecting Wiring”
later in this document.
Panel/Wall Mounting
If mounting this adapter to a panel or wall, refer to publication 1794-2.13.
Mounting (or Replacing) the Adapter on an Existing System
1. Remove the DeviceNet plug-in connector from the front of the
adapter.
2. Disconnect any wiring jumpered to the adjacent terminal base.
3. Open the module latching mechanism and remove the module
from the base unit to which the adapter will be attached.
4. Push the flexbus connector toward the right side of the terminal
base to unplug the backplane connection.
5. Release the locking tab and remove the adapter module.
6. Before installing the new adapter, notice the notch on the right
rear of the adapter. This notch accepts the hook on the terminal
base unit. The notch is open at the bottom. The hook and adjacent
connection point keep the terminal base and the adapter tight
together, reducing the possibility of a break in communication
over the backplane.
When the adapter is locked onto the DIN rail, gently push the
flexbus connector into the adapter to complete the backplane
8. Reinstall the module in the adjacent terminal base unit.
9. Reconnect adapter wiring as described in “Connecting Wiring.)
Connect Wiring
D
COM
E
24V
DeviceNet Connector
1. Connect the DeviceNet cable to the removable connector as
shown.
Connect To
BLK wire -V WHT wire CAN high
BLU wire CAN* low RED wire +V
Bare wire Drain * CAN = Controller Area Network
When connecting wiring, torque terminal screws D, E, F and G to
0.8 Nm (7 lb-in).
F
G
Do not wire more than 2 conductors on any single terminal.
2. Insert connector into mating connector on the DeviceNet adapter
module.
Publication 1794-IN099C-EN-P - May 2010
4
ATTENTION
Node
address
switches
44981
I/O status indicator
Mod/Net status
indicator
Power on indicator
44982
ATTENTION
3. Connect +V DC power to the left side of the lower connector,
terminal E.
Power wiring must be less than 3 meters (9.8 ft) in length.
4. Connect -V common to the left side of the upper connector,
terminal D.
5. Connections G and F are used to pass +V DC power (G) and -V
common (F) to the next module in the series (if required).
NOTE: Cable colors are shown on the wiring label on the front of the
adapter module.
Set the Node Address
Set the node address using the 2-position thumbwheel switch. Valid
settings range from 00 to 63. Press either the + or - buttons to change the
number.
NOTE: The baud rate for the adapter is set by way of “baud detection” at
power-up.
Status Indicators
Status Indicators
Indicator State Description
Power On Power applied to module
Off No power applied to module. Check power wiring to
ModNet
Status
I/O Status Off No power, or outputs off
OFF No power, or no network access
Flashing
green/off
Solid green Online, link okay, connected
Flashing red Recoverable fault
Solid red Critical adapter failure
Flashing red Recoverable fault - outputs in fault
Flashing
green/off
Solid green Device operational - outputs live - run
Solid red Critical adapter fault - unrecoverable
adapter module.
Online, but not connected
Idle program mode - outputs in idle
Publication 1794-IN099C-EN-P - May 2010
Enhancements to Firmware 3.001
Firmware revision 3.001 provides the following functionality to the
1794-ADN DeviceNet adapter.
When you cycle power to the adapter in out-of-the-box mode (no rack configuration
stored in the adapter's memory), and there is a 32-point input or output module
(1794-IB32 or 1794-OB32) on the rail, the adapter will detect the 32-point module as a
2-word module and allocate I/O space appropriately for the network connection.
With firmware revision 3.001, when you cycle power to the adapter in out-of-the-box
mode, if a 1794-IB32 module is detected, it will allocate 2 input words, and no output
words, for the network connection. Similarly for the 1794-OB32, 2 output words, and no
input words, are allocated for the network connection.
Corrected Anomalies
Firmware revision 3.001 corrects these anomalies:
Input data issue in firmware revision 2.004
In firmware revision 2.003 or earlier, the 32-point I/O modules would have only one input
word and one output word allocated in the default out-of-the-box mode of operation for
each 32-point module.
If You Replace Firmware Revision 2.003 or Earlier Adapter With 1794-ADN
Series C
Take the following precautions when replacing a firmware revision 2.003
or earlier adapter with a firmware revision 3.001 or later adapter when the
FLEX rail contains any 32-point modules.
If out-of-the-box mode was used with the original adapter, the 32-point modules were
configured to act as if they were 16-point modules. After changing to the firmware
revision 3.001 adapter, it will not make a connection with the scanner because there will
be a mismatch in the I/O sizes. The scanner will report an error 77, indicating the I/O size
mismatch between the scanner and adapter.
To resolve this I/O size mismatch, two changes must be made:
– The scanner's scan list must be updated to reflect the new adapter's
I/O size.
In the case of each 1794-IB32 module, an extra input word must
be added and the output word deleted. Similarly with each
1794-OB32 module, an extra output word must be added and the
input word deleted.
– After the scanner's scan list has been updated to reflect the new I/O
sizes, the controller's I/O image will have to be adjusted, along
with the controller's ladder program, for any I/O that has shifted
due to I/O image changes.
If out-of-the-box mode was not used, and an RSNetWorx software-based configuration
was downloaded to the original adapter, there are two cases to consider:
– The original adapter's configuration is the same as the v3.001
adapter's out-of-the-box configuration.
In this case, the scanner will automatically make the I/O
connection with the firmware revision 3.001 adapter. Once
network setup is complete, downloading and saving the original
configuration to the adapter is recommended.
– The original adapter's configuration does not match the firmware
revision 3.001 adapter's out-of-the-box configuration.
In this case, the scanner will report an error 77, indicating an I/O
size mismatch.
To correct this issue, download the existing configuration to the
adapter.
The adapter will not accept any downloads that could change its
configuration while there is an active I/O connection between a
scanner and the adapter. It will be necessary to either remove the
scanner from the network or disable the scanlist entry in the scanner
to the adapter, using RSNetWorx software, before configuration
downloads can be done successfully to the adapter
Specifications
General
Attribute Value
I/O capacity 8 modules
Power supply The 24V DC power supply must be capable of providing a
turn-on inrush surge current of 14 A for 5 ms for each adapter
connected to this supply.
5
General
Supply voltage Power supply: 19.2...31.2V DC, 400 mA
DeviceNet power: 24V DC, 90 mA, Class 2
Flexbus output: 5V DC, 640 mA
Input voltage
rating
24V DC nom
19.2V to 31.2 V DC (includes 5% AC ripple)
Current draw 400 mA maximum; 300 mA at 24V DC
Communication
rate
Indicators Power - on/off
Flexbus output
current
Isolation
voltage
125 KB
250 KB
500 KB
ModNet status - red/green
I/O status - red/green
640 mA max. @ 5V DC
50V (continuous), Basic Insulation Type
Type tested at 1930V DC for 60 s, power to Flexbus, power to
DeviceNet, and DeviceNet to Flexbus
Power
7.6W maximum @ 19.2V DC
dissipation
Thermal
26 BTU/hr @ 19.2V DC
dissipation
DeviceNet
power
requirements
Dimensions
(HxWxD)
±4%) at 90 mA max
24V DC (
87 x 68 x 69 mm (3.4 x 2.7 x 2.7 in)
Weight 195.5 g (6.9 oz)
Enclosure type
rating
None (open-style)
Wire size Power connections:
0.33... 3.3 mm² (22...12 AWG) solid or stranded copper wire
rated at 75 °C (167 °F ) or greater 1.2 mm (3/64 in.) insulation
max
Wiring
category
Terminal screw
torque
North American
temp code
1 - on power ports
(1)
2 - on communications ports
0.8 Nm (7 lb-in)
T4
IEC temp code T4
(1)
Use this Conductor Category information for planning conductor routing. Refer to Industrial
Automation Wiring and Grounding Guidelines, publication 1770-4.1
Environmental
Attribute Value
Operating
temperature
Surrounding
air
temperature,
max
Non-operating
temperature
Relative
humidity
Vibration IEC 60068-2-6 (Test Fc, Operating):
IEC 60068-2-1 (Test Ad, Operating Cold),
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
-20…70 °C (-4…158 °F)
70 °C (158 °F)
IEC 60068-2-1 (Test Ab, Unpackaged Non-operating Cold),
IEC 60068-2-2 (Test Bb, Unpackaged Non-operating Dry Heat),
IEC 60068-2-14 (Test Na, Unpackaged Non-operating Thermal
Shock):
-40…85 °C (-40…185 °F)
IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):
5…95% noncondensing
5 g @ 10…500 Hz
Environmental
Operating
shock
Non-operating
shock
IEC 60068-2-27 (Test Ea, Unpackaged Shock):
30 g
IEC 60068-2-27 (Test Ea, Unpackaged Shock):
50 g
Emissions CISPR 11:
Group 1, Class A (with appropriate enclosure)
ESD immunity IEC 61000-4-2:
6 kV contact discharges
8 kV air discharges
Radiated RF
immunity
EFT/B
immunity
Surge
transient
immunity
Conducted RF
immunity
Certifications (when product is marked)
IEC 61000-4-3:
10V/m with 1 kHz sine-wave 80% AM from 80…2000 MHz
10V/m with 200 Hz 50% Pulse 100% AM at 900 MHz
10V/m with 200 Hz 50% Pulse 100% AM at 1890 MHz
3V/m with 1 kHz sine-wave 80% AM from 2000…2700 MHz
IEC 61000-4-4:
±4 kV at 5 kHz on power ports
±4 kV at 5 kHz on communications ports
IEC 61000-4-5:
±1 kV line-line(DM) and ±2 kV line-earth(CM) on power ports
±2 kV line-earth(CM) on communications ports
IEC 61000-4-6:
10V rms with 1 kHz sine-wave 80% AM from 150 kHz…80 MHz
(1)
Attribute Value
c-UL-us UL Listed Industrial Control Equipment, certified for US and
CE European Union 2004/108/EC EMC Directive, compliant with:
C-Tick Australian Radiocommunications Act, compliant with:
Ex European Union 94/9/EC ATEX Directive, compliant with:
Canada. See UL File E65584.
UL Listed for Class I, Division 2 Group A,B,C,D Hazardous
Locations, certified for U.S. and Canada. See UL File E194810.
EN 61326-1; 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)
AS/NZS CISPR 11; Industrial Emissions
EN 60079-15; Potentially Explosive Atmospheres, Protection "n"
EN 60079-0; General Requirements
II 3 G Ex nA IIC T4 X
ODVA ODVA conformance tested to DeviceNet specifications
(1)
See the Product Certific ation link at http://www.ab.com for Declaration of Conformity, Certificates, and
.
other certification details.
Publication 1794-IN099C-EN-P - May 2010
Mounting Dimensions
(Inches)
Millimeters
87
(3.4)
80
(3.2)
68
(2.7)
21 (0.83)
1794-ADN
87H x 68W x 69D
(3.4H x 2.7W x 2.7D)
35
(1.4)
A
59
(2.3)
A
= Mounting hole dimensions for optional mounting kit
B
B
= DIN rail
50
(2.0)
30
(1.2)
C
C = Secure DIN rail approximately every 200 mm
44983
Publication 1794-IN099C-EN-P - May 2010 6 PN-65461
Supersedes Publication 1794-IN099B-EN-P - June 2004 Copyright © 2010 Rockwell Automation, Inc. All rights reserved.
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