Rockwell Automation 1794-AENT User Manual

Installation Instructions

FLEX I/O EtherNet/IP Adapters

Cat. No. 1794-AENT, Series B

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
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.

WARNING

IMPORTANT

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.

) describes

Important User Information

ATTENTION

SHOCK HAZARD

BURN HAZARD

ATTENTION

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, and recognize the consequence

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

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

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 m (6562 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.
Besides 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.

2 FLEX I/O EtherNet/IP Adapters Installation Instructions

A

WARNING

WARNING

WARNING

ATTENTION

ATTENTION

When you insert or remove the module while
backplane 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.

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.

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.

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 (such as 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.

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.

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.

VERTISSEMENT

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.

Publication 1794-IN082C-EN-P - October 2007

FLEX I/O EtherNet/IP Adapters Installation Instructions 3

EtherNet/IP Adapter, Cat. No. 1794-AENT

1

2

2

3

4

5

Component Identification

1 EtherNet/IP adapter

2 Status indicators

3 MAC ID label

4 Network cable RJ45 connector (underside)

5 Adapter DIN rail locking tab

6 24V dc connections

7 24V common connections

8 Flexbus connector

9 IP address switches

2

+

+

9

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

8

DIN rail: releasing the locking tab to lock the
adapter in place.

7

6

5. If necessary, push up on the locking tab to lock.

6. Connect the adapter wiring as shown under

Connecting Wiring later in this document.

Mount or Replace the Adapter on an Existing
System

1. Remove the Ethernet plug-in connector from the

bottom of the adapter.

2. Disconnect any adapter wiring jumpered to the

adjacent terminal base.

Install Your Adapter Module

A

2

2

+

+

Mount on a DIN Rail Before Installation of the
Terminal Base Units

1. Hook the lip on the rear of the adapter (A) onto
the top of the 35 x 7.5 mm DIN rail (B).

2. Rotate the adapter module onto the rail.

3. Press the adapter down onto the DIN rail until

flush.

DIN rail locking tab (C) will snap into position
and lock the adapter to the DIN rail.

B

1794-AENT/B

C

3. Disconnect any user power wiring connections to

the adapter.

4. Using a screwdriver or similar tool, open the

module locking mechanism and remove the
module from the base unit to which the adapter
will be attached.

5. Push the Flexbus connector toward the right side

of the terminal base to unplug the backplane
connection.

ATTENTION

Locking Tab C

Make certain the Flexbus connector is completely
clear of the adapter. The slide must be completely to
the right and the raised spot on the slide visible.

Terminal base of I/O
module adjacent to
the 1794-AENT
adapter.

2

+2+

31244CC

6. Release the DIN rail locking tab (C) and remove

the adapter.

Publication 1794-IN082C-EN-P - October 2007