Allen-Bradley 1734-EP24DC User manual

Installation Instructions
Original Instructions
POINT I/O 24V DC Expansion Power Supply
Catalog Numbers 1734-EP24DC, 1734-EP24DCK, Series B
Catalog numbers with the suffix ‘K’ are conformal coated and their specifications are the
same as non-conformal coated catalogs.
Topic Page
Important User Information 2
Environment and Enclosure 3
North American Hazardous Location Approval 4
European Hazardous Location Approval 5
Prevent Electrostatic Discharge 6
About the Power Supply 9
Install the Power Supply 10
Remove the Power Supply 10
Wire the Power Supply 11
Specifications 14

2Rockwell Automation Publication 1734-IN058E-EN-P - December 2018
POINT I/O 24V DC Expansion Power Supply
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.rockwellautomation.com/literature/) 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 that are 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, when necessary, we use notes to make you aware of safety considerations.
WARNING: 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.
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 consequences.
SHOCK HAZARD: Labels may be on or inside the equipment (for example, drive or motor)
to alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment (for example, drive or motor) to
alert people that surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of
the product.

Rockwell Automation Publication 1734-IN058E-EN-P - December 2018 3
POINT I/O 24V DC Expansion Power Supply
Environment and Enclosure
ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial
environment, in overvoltage Category II applications (as defined in EN/IEC 60664-
1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is not intended for use in residential environments and may not
provide adequate protection to radio communication services in such environments.
This equipment is supplied as open-type equipment for indoor use. 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 or be approved for the
application if nonmetallic.The interior of the enclosure must be accessible only by
the use of a tool. Subsequent sections of this publication may contain more
information regarding specific enclosure type ratings that are required to comply
with certain product safety certifications.
In addition to this publication, see the following:
• Industrial AutomationWiring and Grounding Guidelines,
publication 1770-4.1, for more installation requirements.
• NEMA Standard 250 and EN/IEC 60529, as applicable, for explanations of the
degrees of protection provided by enclosures.
ATTENTION: Read this document and the documents listed in the Additional
Resources section about installation, configuration, and operation of this
equipment before you install, configure, operate, or maintain this product. Users
are required to familiarize themselves with installation and wiring instructions in
addition to requirements of all applicable codes, laws, and standards.
Installation, adjustments, putting into service, use, assembly, disassembly, and
maintenance are required to be carried out by suitably trained personnel in
accordance with applicable code of practice. In case of malfunction or damage, no
attempts at repair should be made. The module should be returned to the
manufacturer for repair. Do not dismantle the module.

4Rockwell Automation Publication 1734-IN058E-EN-P - December 2018
POINT I/O 24V DC Expansion Power Supply
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.
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.
AVERTISSEMENT:
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.
WARNING: When used in a Class I, Division 2, hazardous location, this equipment
must be mounted in a suitable enclosure with proper wiring method that
complies with the governing electrical codes.

Rockwell Automation Publication 1734-IN058E-EN-P - December 2018 5
POINT I/O 24V DC Expansion Power Supply
European Hazardous Location Approval
The following applies to products marked
• Are intended for use in potentially explosive atmospheres as defined by European Union
Directive 2014/34/EU 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.
• Are Equipment Group II, Equipment Category 3, and comply with the Essential Health and
Safety Requirements relating to the design and construction of such equipment given in
Annex II to Directive 2014/34/EU. See the EC Declaration of Conformity at
http://www.rockwellautomation.com/global/certification/overview.page for details.
• The type of protection is II 3G Ex nA IIC T4 Gc according to EN 60079-15.
• Comply to Standards EN 60079-0:2012, EN 60079-15:2010, reference certificate number
DEMKO04ATEX0330347X.
• Are intended for use in areas in which explosive atmospheres caused by gases, vapors, mists,
or air are unlikely to occur, or are likely to occur only infrequently and for short periods. Such
locations correspond to Zone 2 classification according to ATEX directive 2014/34/EU.
• May have catalog numbers followed by a“K”to indicate a conformal coating option.

6Rockwell Automation Publication 1734-IN058E-EN-P - December 2018
POINT I/O 24V DC Expansion Power Supply
Prevent Electrostatic Discharge
WARNING:
• This equipment is not resistant to sunlight or other sources of UV radiation.
• This equipment shall be mounted in an ATEX/IECEx Zone 2 certified enclosure
with a minimum ingress protection rating of at least IP54 (in accordance with
EN/IEC 60079-15) and used in an environment of not more than Pollution
Degree 2 (as defined in EN/IEC 60664-1) when applied in Zone 2
environments.The enclosure must be accessible only by the use of a tool.
• 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 140% of the peak rated voltage when
applied in Zone 2 environments.
• The instructions in the user manual shall be observed.
• This equipment must be used only with ATEX certified
Rockwell Automation backplanes.
• Earthing is accomplished through mounting of modules on rail.
• Devices shall be used in an environment of not more than Pollution Degree 2.
ATTENTION: 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.

Rockwell Automation Publication 1734-IN058E-EN-P - December 2018 7
POINT I/O 24V DC Expansion Power Supply
Special Conditions for Safe Use
ATTENTION:
• This product is grounded through the DIN rail to chassis ground. Use zinc
plated chromate-passivated 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. Be sure to ground the DIN rail
properly. Refer to Industrial AutomationWiring and Grounding Guidelines,
publication 1770-4.1, for more information.
• Do not remove or replace an Adapter Module while power is applied.
Interruption of the backplane can result in unintentional operation or
machine motion.
• 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.
• If this equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
• Do not connect 120/240V AC power to this supply.
• Use the 1734-EP24DC and 1734-EP24DCK expansion power supply only with
POINT I/O™ adapters, such as the 1734-ADN DeviceNet adapter.
• To comply with the CE LowVoltage Directive (LVD), field power and all
connected I/O must be powered from a source compliant with the following:
Safety Extra LowVoltage (SELV) or Protected Extra LowVoltage (PELV).
• To comply with UL restrictions, field power and all connected devices must be
powered from a single source compliant with the following: Class 2.
WARNING: 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. Repeated electrical arcing causes excessive wear to contacts on both
the module and its mating connector. Worn contacts may create electrical
resistance that can affect module operation.

8Rockwell Automation Publication 1734-IN058E-EN-P - December 2018
POINT I/O 24V DC Expansion Power Supply
Electrical Safety Considerations
WARNING: If you connect or disconnect the communication 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.
ATTENTION:
• This equipment is certified for use only within the surrounding air temperature
range of -20…+55 °C (-4…+131 °F). The equipment must not be used
outside of this range.
• Use only a soft dry anti-static cloth to wipe down equipment. Do not use any
cleaning agents.
At the end of its life, this equipment should be collected separately from any
unsorted municipal waste.

Rockwell Automation Publication 1734-IN058E-EN-P - December 2018 9
POINT I/O 24V DC Expansion Power Supply
About the Power Supply
The expansion power supply passes 24V DC field power to the I/O modules to
the right of it. The expansion power supply extends the backplane bus power for
up to 17 I/O modules to the right of the supply and creates a new field voltage
partition segment for driving field devices. The expansion power supply
separates field power from I/O modules to the left of the unit, effectively
providing functional and logical partitioning for the following.
• Separate field power between input and output modules.
• Separate field power to the analog and digital modules.
• Group modules to perform a specific task or function.
The dark-gray color of the expansion power supply allows for easy visual
inspection and identification. Refer to the figure to identify external power
supply components.
Use multiple expansion power supplies with POINT I/O™ adapters to assemble
a full system. With any POINT I/O™ adapter, use an expansion power supply to
add additional modules in 4...17 module increments, for a total of 63 I/O
modules.
RTB removable handle
Removable terminal
block (RTB)
Interlocking
side pieces
DIN rail locking screw
(orange)
Module label
43970

10 Rockwell Automation Publication 1734-IN058E-EN-P - December 2018
POINT I/O 24V DC Expansion Power Supply
Install the Power Supply
To install the expansion power supply on the DIN rail, proceed as follows.
1. Position the power supply vertically above the DIN rail.
2. Engage the interlocking side pieces with the unit on the left.
3. Press down firmly to install the power supply on the DIN rail. The
locking mechanism locks the module to the DIN rail.
Remove the Power Supply
To remove an expansion power supply, proceed as follows.
1. Pull up on the RTB removal handle to remove the terminal block.
2. Remove the module to the right of the 1734-EP24DC or
1734-EP24DCK module from its base unit.
3. Use a small-bladed screwdriver to rotate the DIN rail locking screw to a
vertical position. This releases the locking mechanism.
4. Lift straight up to remove.
42511

Rockwell Automation Publication 1734-IN058E-EN-P - December 2018 11
POINT I/O 24V DC Expansion Power Supply
Replace the Power Supply
To install a replacement expansion power supply, proceed as follows.
1. Remove the module to the right of the power supply from its base unit.
2. Position the power supply vertically above the DIN rail.
3. Slide the power supply down allowing the interlocking side pieces to
engage the adjacent modules (both left and right sides).
4. Press firmly to seat the power supply on the DIN rail. The power supply
locking mechanism snaps into place.
5. Reinsert the module into the base next to the expansion power supply.
Wire the Power Supply
41970
NC
Chas Gnd
C
V
NC
Chas Gnd
C
V
NC = No connection
Chas Gnd = Chassis Ground
C = Common
V = Supply
1734-EP24DC,
1734-EP24DCK

12 Rockwell Automation Publication 1734-IN058E-EN-P - December 2018
POINT I/O 24V DC Expansion Power Supply
12/24V DC Wiring
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.
ATTENTION: Use the 1734-EP24DC and 1734-EP24DCK expansion power supply
only with adapter class products.
ATTENTION: Use the 1734-EP24DC and 1734-EP24DCK expansion power supply
only with POINT I/O™ adapters, such as the 1734-ADN DeviceNet adapter.
Connect Terminal Terminals (for continuing power)
+V DC 6 7
-V DC 4 5
Chas Gnd 2 3
12/24V DC becomes the internal field power bus for modules to the right.
NC = No connection
Chas Gnd = Chassis Ground
C= Common
V = 12/24V DC
43960
V DC
01
23
45
67
NC NC
Chas
Gnd
CC
VV
Chas
Gnd
Do not connect 120/240V AC
power to this supply. This supply will be
connected to the internal
field power bus.
12/24V DC

Rockwell Automation Publication 1734-IN058E-EN-P - December 2018 13
POINT I/O 24V DC Expansion Power Supply
Example of Continuing Power
Example of Functional Partitioning
1734adn4
I
B
2
1734-EP24DC
12/24V DC only
I
B
4C
O
B
2
E
O
B
4
E
I
E
2
C
O
E
2
C
1734-ADN
01
Adapter
Status
DeviceNet
Status
POINTBus
™ Status
System
Power
DeviceNet
Power
System
Power
DeviceNet
Power
I
E
2
C
1734-ADN 1734-EP24DC
010101 01010101
1734adn4
12/24V DC
analog supply
I
B
2
12/24V DC
digital supply
I
B
4
O
B
2
E
O
B
4
E
I
E
2
C
O
E
2
C
01
Adapter
Status
DeviceNet
Status
POINTBus
™ Status
System
Power
DeviceNet
Power
System
Power
DeviceNet
Power
I
E
2
C
1734-ADN 1734-EP24DC
010101 01010101
1734-EP24DC1734-ADN

14 Rockwell Automation Publication 1734-IN058E-EN-P - December 2018
POINT I/O 24V DC Expansion Power Supply
Example of Logical Partitioning
Specifications
POINT I/O™ 24V DC Expansion Power Supply – 1734-EP24DC, 1734-EP24DCK
Attribute Value
I/O module capacity 4...17 modules, depending on current rating of each module
Input voltage rating 24V DC nominal
10…28.8V DC range
Field side power requirements 24V DC (+20% = 28.8V DC max) @ 400 mA max
Inrush current, max 6 A for 10 ms
Indicators 1 green field power status indicator
1 green 5V system power indicator
POINTBus™ output current
Horizontal mounting – 1 A @ 10…19.2V input;
1.3 A @ 19.2…28.8V input
Vertical mounting – 1 A @ 10…28.8V input
Input overvoltage protection Reverse polarity protected
1734adn4
12V DC
supply
I
E
2
C
24V DC supply
O
E
2
C
I
B
2
O
B
2
E
I
B
2
O
B
4
E
01
Adapter
Status
DeviceNet
Status
PointBus
Status
System
Power
DeviceNet
Power
System
Power
DeviceNet
Power
O
B
2
E
1734-ADN 1734-EP24DC
010101 01010101
1734-EP24DC1734-ADN

Rockwell Automation Publication 1734-IN058E-EN-P - December 2018 15
POINT I/O 24V DC Expansion Power Supply
Interruption Output voltage will stay within specifications when input drops out for 10 ms @
10V with maximum load.
Module location Between I/O modules in 1734 system
Breaks field power bus
Limitations Use with POINT I/O™ Adapters only
Dimensions (H x W x D), approx 76.2 x 25.4x 133.4 mm
(3.0 x 1.0 x 5.25 in)
Weight, approx 120 g (4.3 oz)
Terminal base screw torque 0.6 N•m (7 lb-in)
General Specifications
Attribute Value
Power Consumption, max 9.8W @ 28.8V DC
Power dissipation, max 3.0W @ 28.8V DC
Thermal dissipation, max 10.0 BTU/hr @ 28.8V DC
Field power bus supply voltage, nom 24V DC
Field power bus voltage range 10...28.8V DC
Field power bus supply current, max 10 A
Isolation voltage 50V continuous, tested to withstand 2600V DC for 60 s
Enclosure type rating None (open-style)
North American temp code T4A
ATEX temp code T4
Conductor size
0.324…2.08 mm2(22…14 AWG) solid or stranded copper wire rated @ 75 °C
(167 °F) or greater
3/64 inch (1.2 mm) insulation maximum
Conductor category(1)
(1) Use this Conductor Category information for planning conductor routing as described in the appropriate System Level
Installation Manual. Also refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1, for
more information.
2 – on power ports
POINT I/O™ 24V DC Expansion Power Supply – 1734-EP24DC, 1734-EP24DCK
Attribute Value

16 Rockwell Automation Publication 1734-IN058E-EN-P - December 2018
POINT I/O 24V DC Expansion Power Supply
Environmental Specifications
Attribute Value
Temperature, 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…+55 °C (-4…+131 °F)
Temperature, storage
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…+85 °C (-40…+185 °F)
Temperature, surrounding air, max. 55 °C (131 °F)
Relative humidity IEC 60068-2-30 (Test Db, unpackaged nonoperating damp heat):
5…95% noncondensing
Vibration IEC60068-2-6 (Test Fc, operating):
5 g @ 10...500 Hz
Shock, operating IEC 60068-2-27 (Test Ea, unpackaged shock):
30 g
Shock, nonoperating IEC 60068-2-27 (Test Ea, unpackaged shock):
50 g
Emissions IEC 61000-6-4
ESD immunity
IEC6100-4-2:
6 kV contact discharges
8 kV air discharges
Radiated RF immunity
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 @ 900 MHz
10V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz
10V/m with 1 kHz sine-wave 80% AM from 2000…2700 MHz
EFT/B immunity
IEC 61000-4-4:
±2 kV at 5 kHz on power ports
±2 kV at 5 kHz on signal ports
Surge transient immunity IEC 61000-4-5:
±1 kV line-line (DM) and ±2 kV line-earth (CM) on signal ports
Conducted RF immunity IEC61000-4-6:
10V rms with 1 kHz sine-wave 80% AM from 150 kHz to 80 MHz

Rockwell Automation Publication 1734-IN058E-EN-P - December 2018 17
POINT I/O 24V DC Expansion Power Supply
Current Derating for Mounting
Certifications
Certification (When Product
Is Marked)(1)
(1) See the Product Certification link at http://www.rockwellautomation.com/global/certification/overview.page for
Declaration of Conformity, Certificates, and other certification details.
Value
c-UL-us
UL Listed Industrial Control Equipment, certified for US and 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.
CE
European Union 2014/30/EU EMC Directive, compliant with:
• EN 61326-1; Measurement/Control/Laboratory use, Industrial requirements
• EN 61000-6-2; Industrial Immunity
• EN 61000-6-4; Industrial Emissions
• EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)
European Union 2011/65/EU RoHS, compliant with:
• EN 50581;Technical documentation
RCM Australian Radiocommunications Act, compliant with:
AS/NZS CISPR 11; Industrial Emissions
Ex
European Union 2014/34/EU ATEX Directive, compliant with:
• EN 60079-0:2012 + A11:2013; General Requirements
• EN 60079-15; Potentially Explosive Atmospheres, Protection "n"
• II 3G Ex nA IIC T4 Gc
• DEMKO04ATEX0330347X
KC
Korean Registration of Broadcasting and Communications Equipment, compliant with:
• Article 58-2 of RadioWaves Act, Clause 3
EAC Russian Customs Union TR CU 020/2011 EMC Technical Regulation
1.3
1.0
0.5
Horizontal – 1 A @ (10...19.2V); 1.3 A @ (19.2...28.8)
Vertical – 1 A @ (10...28.8V)
10 19.2 28.8
Voltage
Current
43971

18 Rockwell Automation Publication 1734-IN058E-EN-P - December 2018
POINT I/O 24V DC Expansion Power Supply
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Get help determining how products
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global/support/pcdc.page

Rockwell Automation Publication 1734-IN058E-EN-P - December 2018 19
POINT I/O 24V DC Expansion Power Supply
Notes:

Allen-Bradley, Rockwell Automation, POINT I/O, POINTBus, and Rockwell Software are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
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Rockwell Automation maintains current product environmental information on its website at
http://www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page.
Publication 1734-IN058E-EN-P - December 2018 PN-519186
Supersedes Publication 1734-IN058D-EN-P - October 2017 Copyright © 2018 Rockwell Automation, Inc. All rights reserved. Printed in Singapore.