A-BPOINT I/O EtherNet/IP Adapter Catalog Number 1734-AENTInstallation Instructions

mportant User Information

Because of the variety of uses for the products described in this 

publication, those responsible for the application and use of these 

products must satisfy themselves that all necessary steps have been 

taken to assure that each application and use meets all performance 

and safety requirements, including any applicable laws, regulations, 

codes and standards. In no event will Rockwell Automation be 

responsible or liable for indirect or consequential damage resulting 

from the use or application of these products.

Any illustrations, charts, sample programs, and layout examples 

shown in this publication are intended solely for purposes of 

example. Since there are many variables and requirements associated 

with any particular installation, Rockwell Automation does not 

assume responsibility or liability (to include intellectual property 

liability) for actual use based upon the examples shown in this 

publication.

Allen-Bradley publication SGI-1.1, Safety Guidelines for the 

Application, Installation and Maintenance of Solid-State Control 

(available from your local Rockwell Automation office), describes 

some important differences between solid-state equipment and 

electromechanical devices that should be taken into consideration 

when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in 

whole or part, without written permission of Rockwell Automation, is 

prohibited.

Throughout this publication, notes may be used to make you aware 

of safety considerations. The following annotations and their 

accompanying statements help you to identify a potential hazard, 

avoid a potential hazard, and recognize the consequences of a 

potential hazard

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 equipmen

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.

• When not in use, store the equipment in 

appropriate static-safe packaging.

ATTENTION POINT I/O is grounded through the DIN rail to 

chassis ground. Use zinc-plated, yellow-chromated 

steel DIN rail to assure proper grounding. Using 

other DIN rail materials (e.g., aluminum, plastic, 

etc.) which can corrode, oxidize or are poor 

conductors, can result in improper or intermittent 

platform grounding.

WARNING When you connect or disconnect the Removable 

Terminal Block (RTB) with field side power 

applied, 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

Before You Begin 

 To effectively use your adapter, note the following considerations. 

Determine Compatibility

If using the 1734-AENT adapter with a 1756-ENBT module or 

1788-ENBT module, use the following required firmware versions for 

these bridge modules:

• 1756-ENBT firmware version 2.3 or greater

• 1788-ENBT firmware version 1.33 or greater

If you use the BootP Utility to assign IP addresses to the adapter, use 

version 2.3.2 or greater.

Understand Messaging

Class 3 (Explicit Message) requests through the 1734-AENT adapter to 

a specific POINT I/O module may not always receive a response 

from the I/O modules. In the case where the I/O module does not 

reply to the request, the adapter responds with an error code 

indicating a time-out.

Establish I/O Connections 

When you power up a POINT I/O system and establish I/O 

connections, the outputs transition to the Idle state, applying Idle 

state data before going to RUN mode. This occurs even when the 

controller making the connection is already in RUN mode.

Configure Autobaud 

The adapter cannot reconfigure an I/O module that you previously 

configured to operate at a fixed baud rate. When you reuse a POINT 

I/O module from another POINT I/O system, configure the module 

to autobaud before using it with the adapter.

For More Information

The following related publications are available online at URL 

http://literature.rockwellautomation.com. 

Install the EtherNet/IP Adapter

To install the adapter on the DIN rail prior to installing other base 

units, proceed as follows.

1. Position the adapter vertically above the DIN rail.

2. Press down firmly to install the adapter on the DIN rail. The 

locking mechanism will lock the adapter to the DIN rail.

3. Set the node address on the node address thumbwheel.

If you connect or disconnect the Ethernet 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.

POINT I/O EtherNet/IP AdapterSlide the safety end cap up to remove. This exposes the backplane and power interconnections.

Do not discard the end cap. Use this end cap to 

cover the exposed interconnections on the last 

mounting base on the DIN rail. Failure to do so 

could result in equipment damage or injury from 

electric shock

Set the Network Address

The adapter ships with the thumbwheel switches set to 999 and 

DHCP enabled. You can set the network Internet Protocol (IP) 

address 3 ways: 

• Use the thumbwheel switches on the module

• Use a Dynamic Host Configuration Protocol (DHCP) server, 

such as Rockwell Automation BootP/DHCP

• Retrieve the IP address from nonvolatile memory

The adapter reads the thumbwheel switches first to determine if the switches are set to a valid number. You set the node address using the 3-position thumbwheel switch. Press the + or - buttons to change the number. Valid settings range from 001 to 254. When the switches are set to a valid number, the adapter’s IP address is 192.168.1.xxx (where xxx represents the number set on the switches). The adapter’s

subnet mask is 255.255.255.0 and the gateway address is set to 

0.0.0.0. The adapter does not have a host name assigned, or use any 

Domain Name System when using the thumbwheel settings.

If you set the switches to an invalid number (i.e. 000 or a value 

greater than 254), the adapter checks to see if you enabled DHCP, 

according to the following table. 

Refer to publication 1734-UM011, POINT I/O EtherNet/IP Adapter 

User Manual, for more information.

Install a Replacement EtherNet/IP Adapter to an Existing System

1. Remove the existing adapter from the DIN rail as follows:

a. Disconnect the EtherNet connector from the adapter.

b. Pull up on the RTB removal handle to remove the terminal 

block.

c. Remove the adjacent module from its base.

d. Use a small bladed screwdriver to rotate the DIN rail 

locking screw to a vertical position. This releases the 

locking mechanism.

e. Lift straight up to remove.

If DHCP is Then the adapter

Enabled Asks for an address from a DHCP server. The 

DHCP server also assigns other Transport 

Control Protocol (TCP) parameters.

Not enabled Uses the IP address (along with other TCP 

configurable parameters) stored in nonvolatile 

memory

ATTENTION You must use Series C POINT I/O modules with the 

1734-AENT adapter. Series A or B POINT I/O 

modules do not work with this adapter.

2. Slide the safety end cap up to remove. This exposes the 

backplane and power connections.

3. Position the replacement adapter vertically above the DIN rail. 

Make certain the DIN rail lock is in the horizontal position. 

Slide the adapter down, allowing the interlocking side pieces 

to engage the adjacent module.

4. Press firmly to seat the adapter on the DIN rail. The adapter 

locking mechanism will snap into place.

5. Set the node address on the node address thumbwheel.

6. Insert the end of the terminal block (RTB) opposite the handle 

into the base unit. This end has a curved section that engages 

with the wiring base.

7. Rotate the terminal block into the wiring base until it locks 

itself into place.

8. Replace the adjacent module in its base.

9. Reconnect the Ethernet cable to the adapter.

10. Set the IP Address for this module. Refer to the Setting the 

Network Address section of these instructions. 

Wire the EtherNet/IP Adapter

WARNING 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.

Troubleshoot with the Indicators

Indication Probable Cause

System Power

Off Not active; field power is off or dc-dc converter problem

Green System power on; dc-dc converter active (5V)

Field Power

Off Not active; field power is off

Green Power on; 24V present

Module Status

Off No power applied to device

Flashing Red/Green LED powerup test (module self-test)

Green Device is operating normally

Flashing Red Recoverable fault has occurred:

• Firmware (NVS) update

• Network IP Address changed

• CPU load exceeded

Solid Red Unrecoverable fault has occurred:

• Self-test failure (checksum failure, or ramtest failure at 

powerup)

• Firmware fatal error

ndication Probable Cause

Network Status

Off Device not initialized. The module does not have an IP address.

Flashing Green No CIP connections. Device has an IP address, but no CIP 

connections are established.

Green CIP connections. Device on-line and has an IP address, and CIP 

connections are established.

Flashing Red One or more EtherNet connections has timed-out.

Red No link. The module is not physically connected to a powered 

EtherNet Device.

Flashing Red/Green The module is performing a self-test (only occurs during 

powerup test).

Network Activity

Off No link established.

Flashing Green/Off Transmit or receive activity.

Steady Green Link established.

PointBus Status

Off Device not powered - check module status indicator.

Flashing Red/Green LED powerup test.

Flashing Red Recoverable fault has occurred:

• at powerup the number of expected modules 

does not equal the number of modules present 

• a module is missing

• node fault (I/O connection timeout)

POINT I/O EtherNet/IP Adapter 

Publication 1734-IN590B-EN-P - February 2016

European Hazardous Location Approval 

Red Unrecoverable fault has occurred:

• the adapter is bus off

• the adapter has failed its duplicate MAC ID check

Flashing Green Adapter online with no connections established:

• adapter chassis size has not been configured

• controller in program/idle mode

• EtherNet cable open

Green Adapter online with connections established (normal 

operation, run mode).

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.

DEMKO 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 03NK30347.

Compliance with the Essential Health and Safety Requirements has been assured by 

compliance with EN 50021.

IMPORTANT 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

North American Hazardous Location Approval

The following information applies when 

operating this equipment in hazardous 

locations:

Informations sur l’utilisation de cet équipement 

en environnements dangereux:

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.

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.

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.

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 

1, Division 2.

• S’assurer que l’environnement est 

classé non dangereux avant de changer 

les piles.

Specifications

Adapter Specifications

Expansion I/O Capacity Maximum of 63 modules

Maximum of 5 Rack Optimized connections (for digital modules 

only)

Maximum of 20 direct connections

1734-AENT backplane current output = 1.0A.

The actual number of modules can vary. Add up the current 

requirements of the modules you want to use to make sure they do 

not exceed the amperage limit of 1.0A for the 1734-AENT. 

Backplane current can be extended beyond 1.0A by using 

1734-EP24DC backplane extension Power Supplies. Add multiple 

1734-EP24DC modules to reach the 63 module maximum).

Cat. No. PointBus Current Requirements

1734-IB2 75mA

1734-IB4 75mA

1734-IB8 75mA

1734-IV2 75mA

1734-IV4 75mA

1734-OB2 75mA

1734-OB4 75mA

1734-OB8 75mA

1734-OB2E 75mA

1734-OB2EP 75mA

1734-OB4E 75mA

1734-OB8E 75mA

1734-OV2E 75mA

1734-OV4E 75mA

1734-OW2 80mA

1734-OX2 100mA

1734-IE2C 75mA

1734-OE2C 75mA

1734-IE2V 75mA

1734-OE2V 75mA

1734-IA2 75mA

1734-IM2 75mA

1734-OA2 75mA

1734-IJ2 160mA

1734-IK2 160mA

1734-IR2 220mA

1734-IT2I 175mA

1734-SSI 110mA

1734-VHSC5 180mA

1734-VHSC24 180mA

1734-232ASC 75mA

1734-485ASC 75mA

EtherNet 

Communication Rate

10/100Mbits/s, half or full-duplex

Module Location Starter module - left side of the 1734 system

Power Supply Specifications

Input Voltage Rating 24V dc nominal

10-28.8V dc range

Field Side Power 

Requirements

24V dc (+20% = 28.8V dc maximum) @ 400mA maximum

Inrush Current 6A maximum for 10ms

Interruption Output voltage will stay within specifications when input drops out 

for 10ms at 10V with maximum load.

General Specifications

Indicators 4 red/green status indicators

Adapter status

PointBus status

Network activity status

Network status

2 green power supply status indicators: 

System Power (PointBus 5V power)

Field Power (24V from field supply)

Power Consumption 4.5W maximum @ 28.8V dc

Power Dissipation 15.5W maximum @ 28.8V

PointBus Output 

Current

1A maximum @ 5V dc ±5% (4.75 - 5.25)

Input Overvoltage 

Protection

Reverse polarity protected

Thermal Dissipation 9.5 BTU/hr maximum @ 28.8V dc

Isolation Voltage Tested to withstand 1800V dc for 60s 

Field Power Bus

Nominal Voltage

Supply Voltage Range

Supply Current

24V dc

10-28.8V dc range 

10A maximum

Dimensions Inches

(Millimeters)

3.0H x 2.16W x 5.25L

(76.2H x 54.9W x 133.4L) 

Environmental 

Conditions

Operational 

Temperature

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 to 55° C (-4 to 131° F)

Storage 

Temperature

IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Cold),

IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat),

IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal 

Shock): -40 to 85° C (-40 to 185° F)

Relative Humidity IEC 60068-2-30 (Test Db, Unpackaged Nonoperating Damp Heat): 5 

to 95% noncondensing

Shock IEC 60068-2-27 (Test Ea, Unpackaged Shock)

Operating 30g peak acceleration

Nonoperating 50g peak acceleration

Vibration IEC 60068-2-6 (Test Fc, Operating)

Tested 5g @ 10-500Hz

ESD Immunity IEC 61000-4-2:

6kV contact discharges

8kV air discharges

Radiated RF 

Immunity

IEC 61000-4-3:

10V/m with 1kHz sine-wave 80%AM from 30MHz to 2000MHz

10V/m with 200Hz 50% pulse 100%AM from 900MHz

EFT/B Immunity IEC 61000-4-4:

+4kV at 5.0kHz on power ports

+2kV at 5.0kHz on communications ports

Surge Transient 

Immunity

IEC 61000-4-5:

+1kV line-line(DM) and +2kV line-earth(CM) on communications 

ports

+1kV line-line(DM) and +2kV line-earth(CM) on power ports

Conducted RF 

Immunity

IEC 61000-4-6:

10Vrms with 1kHz sine-wave 80%AM from 150kHz to 80MHz

Emissions CISPR 11

Group 1, Class A

Enclosure Type Rating None (open-style)

Conductors

Wire Size

Wiring Category1,2

14-22 AWG (2.5-0.25mm2

) solid or stranded wire 

rated at 75o

C or higher

3/64 inch (1.2mm) insulation maximum

1 - on power ports

2 - on communications ports

EtherNet Connector RJ-45, Category 5

Terminal Base Screw 

Torque

7 pound-inches (0.8Nm)

Mass 9.0 oz/255 grams

Certifications3 

 (when product is 

marked)

C-UL-USUL Listed for Class I, Division 2, Groups A, B, C and D

Hazardous locations, certified for US and Canada

EEX European Union 94/9/EC ATEX Directive, 

compliant with:

EN 50021; Potentially Explosive Atmospheres,

Protection “n” (Zone 2)

CE 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

Requirements 

EN 61000-6-2; Industrial Immunity

C-Tick Australian Radiocommunications Act, compliant with:

AS/NZS CISPR 11; Industrial Emissions

EtherNet/IP

ODVA conformance tested to EtherNet/IP specifications

1 Use this conductor category information for planning conductor routing as described in publication 

1770-4.1, “Industrial Automation Wiring and Grounding Guidelines.”

2 Use the Conductor Category information for planning conductor routing as described in the 

appropriate System Level Installation Manual. 

3 See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and 

other certification details.

Rockwell Automation Support

Rockwell Automation provides technical information on the web to assist you 

in using its products. At http://support.rockwellautomation.com, you can find 

technical manuals, a knowledge base of FAQs, technical and application 

notes, sample code and links to software service packs, and a MySupport 

feature that you can customize to make the best use of these tools.

For an additional level of technical phone support for installation, 

configuration and troubleshooting, we offer TechConnect Support programs. 

For more information, contact your local distributor or Rockwell Automation 

representative, or visit http://support.rockwellautomation.com.

Installation Assistance

If you experience a problem with a hardware module within the first 24 hours 

of installation, please review the information that's contained in this manual. 

You can also contact a special Customer Support number for initial help in 

getting your module up and running:

New Product Satisfaction Return

Rockwell tests all of its products to ensure that they are fully operational when 

shipped from the manufacturing facility. However, if your product is not 

functioning and needs to be returned:

United States 1.440.646.3223 Monday – Friday, 8am – 5pm EST

Outside United States Please contact your local Rockwell Automation representative for any 

technical support issues.

United States Contact your distributor. You must provide a Customer Support case number 

(see phone number above to obtain one) to your distributor in order to 

complete the return process.

Outside United States Please contact your local Rockwell Automation representative for return 

procedure.