Rockwell Automation 1794-ACN15, 1794-ACN15K, 1794-ACNR15, 1794-ACNR15XT User Manual

Installation Instructions

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

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FLEX I/O ControlNet Adapter Modules

Cat. No. 1794-ACN15, 1794-ACN15K, 1794-ACNR15,
1794-ACNR15XT, Series D

(1794-ACN15K and 1794-ACNR15XT 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
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 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 to identify a hazard, avoid a hazard, and
recognize the consequences.

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

SGI-1.1 available from your local

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

, for additional

different types of enclosure.

If you insert or remove the module while backplane power is on, or
connect or disconnect the ControlNet cable (BNC or NAP) 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.

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

The Network Access Port (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.

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.

Personnel responsible for the application of safety-related
programmable electronic systems (PES) shall be aware of the safety
requirements in the application of the system and shall be trained
in using the system.

Publication 1794-IN128E-EN-P - March 2011

2 FLEX I/O ControlNet Adapter Modules

ATTENTION

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AVERTISSEMENT

1

2

3A

3B

5

4

6

7

8

45085

Do not remove or replace an adapter module while power is
applied. Interruption of the backplane can result in unintentional
operation or machine motion.

To reduce susceptibility to noise, power communications adapter
modules and I/O modules from separate power supplies.

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).

Prevent 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.

• Use a static-safe workstation, if available.

• Store the equipment in appropriate static-safe packaging
when not in use.

For Class I Division 2 applications, use only Class I Division 2 listed
or recognized accessories and modules approved for used within the
1794 platform.

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.

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, 1794-ACN15, 1794-ACN15K, 1794-ACNR15,
1794-ACNR15XT, Series D

8

7

9

6

5

0

X10

4

1

3

2

8

7

9

6

5

0

X1

4

1

3

2

European Hazardous Location Approval

The following adapters are European Zone 2 approved: 1794-ACN15,
1794-ACN15K, 1794-ACNR15, 1794-ACNR15XT, Series D.

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.

• 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 adapters are North American Hazardous Location approved:
1794-ACN15, 1794-ACN15K, 1794-ACNR15, 1794-ACNR15XT, Series D

Component Identification

1 ControlNet Node selection dial 5 ControlNet programming terminal

network access port (NAP)

2 Indicators 6 +24V DC connections

3A ControlNet network cable BNC connector A7 24V common connections

3B ControlNet network cable BNC connector

B (1794-ACNR15, 1794-ACNR15XT only)

8 FlexBus connector

4 Module locking tab

1794-ACN15(K), 1794-ACNR15(XT) Series D, Firmware Revision 10.2, of the
FLEX I/O ControlNet Single and Redundant adapters function as drop-in
replacements for the series C adapters and continue to support 32-bit modules and
numerical display of the firmware revision in RSNetWorx for ControlNet
(Revision 3.21 or later).

Publication 1794-IN128E-EN-P - March 2011