Installation Instructions
WARNING
IMPORTANT
ATTENTION
ATTENTION
WARNING
WARNING
ATTENTION
ATTENTION
IMPORTANT
FLEX I/O ControlNet Adapter Modules
Cat. No. 1794-ACN15, ACN15K, -ACNR15 and
-ACNR15K, Series B
(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 available from your local Rockwell
Automation sales office or online at http://www.ab.com/manuals/gi) 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 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.
When you insert or remove the module while backplane power is on,
or connect or disconnect the ControlNet cable with power applied to
the 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..
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 (e.g. aluminum, plastic,
etc.) that can corrode, oxidize, or are poor conductors, can result in
improper or intermittent g rounding.
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-ACN15/C,
-ACN15K/C, -ACNR15/C and -ACNR15K/C.
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
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 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.
See NEMA Standards publication 250 and IEC publication 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 the Allen-Bradley publication
1770-4.1 ("Industrial Automation Wiring and Grounding
Guidelines"), for additional installation requirements pertaining to
this equipment.
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.
Observe the following additional Zone 2 certification requirements.
• 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
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
FLEX I/O is a trademark of Rockwell Automation
ControlNet is a trademark of ControlNet International Publication 1794-IN101B-EN-P - June 2004
2
WARNING
AVERTISSEMEN
6
1
2
3A
3B
4
5
7
8
9
ATTENTION
WARNING
A
B
C
North American Hazardous Location Approval
The following adapters are North American Hazardous Location approved:
1794-ACN15/C, -ACN15K/C, -ACNR15/C and -ACNR15K/C.
The following information applies when operating this
equipment in hazardou s 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.
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.
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.
ControlNet Adapter, Cat. No. 1794-ACN15 and 1794-ACNR15
This version of the 1794-ACN15(K) and -ACNR15(K) adapters changed how
the adapter firmware is displayed in RSNetworx for ControlNet (Rev 3.0 and
earlier). Previous versions of the adapters displayed an alpha for the firmware
version
(C/F = major firmware revision C [3] , minor firmware revision F [6] ). This
current release will display the firmware revision numerically. (Ex. 4.1 = major
firmware revision 4, minor firmware revision 1). The Series remains
unchanged as Series
C.
Customers using RSNetworx for ControlNet (Revision 3.21 or later) will see all
current and previous versions of 1794-ACN15 and -ACNR15 adapter
firmware displayed numerically.
Installing Your ControlNet Adapter Module
During mounting of all devices, be sure that all
deb ri s ( metal ch ip s, wi re st rands , e tc .) is k ep t f rom
falling into the module. Debris that falls into the
module could cause damage on power up.
Mounting on a DIN rail before installing the Terminal Base Units
1. Position the ControlNet adapter module (A) on a 35 x 7.5mm 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 module onto the rail.
3. Press the adapter module down onto the DIN rail until flush. Locking
Component Identification
1 ControlNet Adapter Module
2 Indicators
3A ControlNet network cable BNC connector A
3B ControlNet network cable BNC connector B
4 ControlNet Node selection thumbwheel switches
5 ControlNet programming terminal connector port
6 Module locking tab
7 +24V dc connections
8 24V common connections
9 Flexbus connector
1794-ACN15(K) and 1794-ACNR15(K) Series C, Firmware 4.1, of the FLEX
I/O ControlNet Single and Redundant adapters allow the 1794-ACN15(K)
and 1794-ACNR15(K) to talk with the 1794-OB32 module. (Previous versions
of the 1794-ACN15 and -ACNR15 adapters would not properly communicate
with the new 1794-OB32 module.)
(1794-ACNR15 only
tab C will snap into position and lock the adapter module to the DIN
rail.
4. If the adapter module does not lock in place, use a screwdriver or
similar device to move the locking tab down while pressing the
adapter module 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.
5. Connect the adapter wiring as shown under “Wiring” later in this
document.
Panel/Wall Mounting
If mounting this adapter to a panel or wall, refer to publication 1794-5.13,
“Panel Mounting Kit, Cat. No. 1794-NM1.”
Mounting (or Replacing) the Adapter on an Existing System
1. Disconnect any wiring jumpered to the adjacent terminal base.
2. Disconnect the BNC connector(s) from the front of the adapter
If you connect or disconnect the ControlNet cable with
power applied to this module or any device on the network,
an electrical arc can ocur. This could cause an explosion in
hazardous installations. Be sure that power is removed or
the area is nonhazardous before proceeding.
Publication 1794-IN101B-EN-P - June 2004
3. Open the module latching mechanism and remove the module from
WARNING
30133
C
Push down and in at the same time to lock the adapter to the DIN rail.
When the adapter is locked onto the DIN rail, gently push the flexbus connector into
the adapter to complete the backplane
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.
A
C
D
E
F
GB
ATTENTION
ATTENTION
Network
Address
Switches
Comm B
Comm A
Status
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.
7. Complete the adapter mounting as shown below.
3
When connecting wiring, torque terminal screws C, D, E and F to 7
pound-inches (0.8Nm).
3. Connect +V dc power to the left side of the lower connector, terminal
D.
Power wiring must be less than 9.8 ft. (3 meters) in length.
4. Connect -V common to the left side of the upper connector, terminal
C.
5. Connections E and F are used to pass +V dc power (F) and -V
common (E) to the next module in the series (if required).
6. Set the network address using the 2-button thumbwheel switch G.
Valid settings range from 01 to 99. Press either the + or - buttons to
change the number.
8. Reinstall the module in the adjacent terminal base unit.
Connecting Wiring
1. Connect the ControlNet network cable to connector, terminal A.
2. 1794-ACNR15 only - Connect the redundant ControlNet network
cable to connector B.
If you connect or disconnect the ControlNet cable with power
applied to this module or any device on the network, an electrical arc
can ocur. This could cause an explosion in hazardous installations.
Be sure that power is removed or the area is nonhazardous before
proceeding.
Indicators
LED Indications Probable Cause
Comm A and Comm B Simultaneously
Off No power, or reset
Red Adapter inoperative
Red/Green - flashing alternately Adapter self-test
Red/Off - flashing alternately Bad node configuration (duplicate address)
Comm A or Comm B (individually)
Off Channel disabled
Green Channel operational
Flashing Green/Off Temporary network errors
Flashing Red/Off Cable fault, broken cable, redundancy
Flashing Red/Green Bad network configuration
warning
Publication 1794-IN101B-EN-P - June 2004
LED Indications Probable Cause
3.4
(87)
3.2
(80)
3.7
(94)
2.0
(50)
1.2
(30)
A
B
1794-ACN15, -ACNR15
3.4H x 3.7W x 2.7D
(87H x 94W x 69D)
(1794-ACNR15
A = DIN rail
B = Secure DIN rail about every 200mm
shown)
Status Indicator
Off No power
Flashing Green On-line but not connected
Green On-line, link okay, connected
Flashing Red I/O module removed, wrong I/O module
inserted, FLASH program update in progress
Red Critical - adapter failure
Specifications
Specifications - Cat. No. 1794-ACN15 and -ACNR15
I/O Capacity 8 modules
Input Voltage Rating 24V dc n ominal
Current Draw 450mA maximum; 330mA @ 24V dc
Inrush Current 23A for 2ms
Communication Rate 5M bps
Indicators I/O Status - red/green
Flexbus Output Current 640mA maximum
Isolation Voltage Tested at 850V dc for 1s between user power and flexbus
Power Dissipation 4.6W maximum @ 19.2V dc
Ter min al S cre w Tor que 7 pound-inches (0.8Nm)
Dimensions 3.4H x 3.7W x 2.7D inches
19.2V to 31.2 V dc (includes 5% ac rippl e)
Comm A - red/green
Comm B - red/green
87H x 94W x 69D mm
ControlNet Cable Belden RG-6/U
Certifications (when product is
2
marked)
1 You use this category information for planning conductor routing as described in Allen-Bradley
publication 1770-4.1, Industrial Automation Wiring and Grounding Guidelines.
2 For the latest up-to-date information, see the Product Certification link at www.ab.com for Declarations of
Conformity, Certificates and other certification details. For notification of any additional release notes, refer to
www.ab.com/manuals/.
CULUSUL Listed Industrial Control Eq uipment, certified for US
and Canada
UL UL Listed for Class I, Division 2 Group A,B,C,D Hazardous
Locations
CUL UL Listed for Class I, Division 2 Group A,B,C,D Hazardous
Locations, certified for Canada
CSA CSA certified Process Control Equipment
CSA CSA certified for Class I, Division 2, Grou ps A, B, C and D
Hazardous locations
EEx2European Union 94/9/EEC ATEX Directive, compliant with:
EN 50021; Potentially Explosive Atmospheres,
Protection “n” ( Zone 2)
CE2 European Union 89/336/EEC EMC Directive,
compliant with:
EN 61000-6-4; Industrial Emissions
EN 50082-2; Industrial Immunity
EN 61326; Meas./Control/Lab., Industrial Req uirements
EN 61000-6-2; Industrial Immunity
C-Tick2 Australian Radiocommunications Act com pliant with
AS/NZS CISPR 11, Industrial Emissions
Mounting Dimensions
General Specifications
Environmental Conditions
Operating Temperature IEC 60068-2-1 (Test Ad, Operating Cold),
Storage Temperature IEC 60068-2-1 (Test Ab, Un-packaged Non-operating Cold),
Relative Humidity IEC 60068-2- 30 (Test Db, Un-packaged Non-operating
Vibration IEC60068-2-6 (Test Fc, Operating):
Shock IEC60068-2-27 (Test Ea, Unpackaged shock):
Emissions CISPR 11:
ESD Immunity IEC 61000-4-2:
Radiated RF Immunity IEC 61000-4-3:
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)
Conductors Wire Size
Category
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
0 to 55°C (32 to 131°F)
IEC 60068-2-2 (Test Bb, Un-packaged Non-operating Dry Heat),
IEC 60068-2-14 (Test Na, Un-packaged Non-operating Thermal Shock) :
–40 to 85°C (–40 to 185°F)
Damp Heat):
5 to 95% non-condensing
5g @ 10-500Hz
Operating 30g
Non-operating 50g
Group 1, Class A (with appropriate enclosure)
4kV contact discharges
8kV air discharges
10V/m with 1kHz sine-wave 80%AM from 30MH z to 1000MHz
10V/m with 200 50% Pulse 100% AM a t 900MHz
±2kV at 5kHz on communication port s
±2kV line-earth(CM) on shielded ports
10Vrms with 1kHz sine-wave 80%AM from 150kHz to 30MHz
22-12AWG (0.34mm2-2.5mm2) stranded copper wire rated at 75°C or
higher
3/64 inch (1.2mm) insulation maximum
1
2
Publication 1794-IN101B-EN-P - June 2004 4 PN 957899-40
Supersedes Publication 1794-IN101A-EN-P - August 2003 Copyright © 2004 Rockwell Automation, In c. All rights reserved. Printed in the U.S.A.
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