Rockwell Automation 1771-OBD User Manual

Installation Instructions

dc (10…60V) Output Module

Catalog Number 1771-OBD Series C

Topic Page

About This Publication 1

Important User Information 2

Before You Begin 4

Key the Backplane 5

Install the Module 6

Interpreting the LED Indicators 11

Replace the Fuse 12

Hazardous Location Approvals 13

Specifications 15

About This Publication

Use this document as a guide when installing the 1771-OBD series C output module.

Publication 1771-IN054C-EN-P - November 2006

2 dc (10…60V) Output Module

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) 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, when necessary, we use notes to make you aware of safety considerations.

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

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.

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

Publication 1771-IN054C-EN-P - November 2006

Environment and Enclosure

dc (10…60V) Output Module 3

ATTENTION

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 nonmetallic. 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, 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.

Preventing Electrostatic Discharge

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.

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4 dc (10…60V) Output Module

Before You Begin

Before you begin, make sure that the following decisions are made.

Determining Module Placement in the I/O Chassis

You can place your module in any I/O module slot of the I/O chassis, except for the extreme
left slot. This slot is reserved for programmable controllers or adapters.

Group your module to minimize adverse effects from radiated electrical noise and heat. We
recommend the following:

• Group analog input and low voltage dc modules away from ac modules or high voltage dc
modules to minimize electrical noise.

• Do not place this module in the same module I/O group with a digital high-density I/O
module when using two-slot addressing. This module uses a byte in both the input and
output image tables for block transfer.

Important Preinstallation Considerations

The 1771-OBD series C module is compatible with all 1771 universal I/O chassis except
1771-A1, 1771-A2, and 1771-A4. Make sure no other output module or single-slot block
transfer module is placed in the same module group when using two-slot addressing.

Calculate Power Requirements

Your module receives its power through the 1771 I/O chassis backplane from the chassis
power supply. The module requires 400 mA from the output of this supply. To calculate the
requirements for the backplane power supply, add 400 mA to the power requirements of all
other modules in the I/O chassis. Calculating the requirements will prevent an overload to the
chassis backplane and/or backplane power supply.

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dc (10…60V) Output Module 5

Key the Backplane

Place your module in any slot in the chassis except the leftmost slot, which is reserved for
processors or adapters.

Position keying bands in the backplane connectors to
correspond to the key slots on the module.

I/O Chassis

You can change the position of these bands if subsequent system
design and rewiring makes insertion of a different type of module
necessary.

Place the keying bands:

- between 10 and 12

- between 22 and 24

1. Position the keying bands in the backplane connectors to correspond to the key slots
on the module.

2. Place the keying bands:

- between 10 and 12.

- between 22 and 24.

You can change the position of these bands if subsequent system design and rewiring makes
insertion of a different type of module necessary.

ATTENTION

Observe the following precautions when inserting or removing keys:

• Insert or remove keys with your fingers.

• Make sure that key placement is correct.

Incorrect keying or the use of a tool can result in damage to the backplane connector and
possible system faults.

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6 dc (10…60V) Output Module

Install the Module

ATTENTION

Make certain that you do not install this module into a chassis slot keyed for a 1771-IAD
series D input module.

Install the module and secure it in the chassis.

1. Position the module in the card guides
for the chosen slot.

2. Slide the module into the chassis and
apply firm, even pressure to seat the
module into its backplane connector.

3. Series A chassis: Snap the chassis latch
lever over the top of the module to secure
the module in the chassis.

Series B chassis: Swing the locking bar
down into place, making sure the locking
bar pins are engaged to secure the module
in the chassis.

4. Attach the field wiring arm to the
horizonal bar at the bottom of the
chassisThe wiring arm pivots upward so
you can install or remove the module
without disconnecting the wires.

1771-A1B, 1771-A2B, 1771-A3B,
1771-A3B1, 1771-A4B I/O Chassis

1771-A1B, 1771-A2B, 1771-A3B1,
1771-A4B Series B I/O Chassis

Locking Bar Pin

Locking Tab

Card Guides

Module

Locking Bar

Card Guides

The 1771-OBD module is a modular component
of the 1771 I/O system requiring a properly
installed system chassis. Refer to the Universal
I/O Chassis Installation Instructions, publication
1771-IN075, for detailed information on.
acceptable chassis, along with proper installation
and grounding requirements. Limit the adjacent
slot power dissipation to 10 W maximum.

Publication 1771-IN054C-EN-P - November 2006

Remove

Horizontal Bar

1771-WH

Install

Module

Wiring Arm

dc (10…60V) Output Module 7

Connect Wiring

Connect your I/O devices to the field wiring arm, 1771-WH, shipped with the module.

WARNING

When you connect or disconnect the wiring arm 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.

WARNING

ATTENTION

Permanent damage to the module may occur in applications where frequent overload or
short circuit conditions are possible. To prevent module damage where these conditions
exist, use the optional 1771-WHF or 1771-WHFB fused field-wiring arm instead of the
1771-WH field-wiring arm shipped with the module. Note that the optional 1771-WHF or
1771-WHFB fused field-wiring arms are not certified for use in Class I, Division 2, Groups
A, B, C, and D environments.

Remove power from the 1771 I/O chassis backplane before you install this module.
Failure to remove power from the backplane could cause:

• module damage or degradation of performance.

• injury or equipment damage due to possible unexpected operation.

You can use an ac (24V) output module, 1771-OND series C, to directly drive terminals on an
ac/dc (24V) input module, 1771-IND series C, as shown in the connection diagram on
page 8.

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8 dc (10…60V) Output Module

Connection Diagram

A

+dc
+dc

+dc
+dc

Output 00

Output 01
Output 02

Output 03

Output 04

Output 05

Output 06

Output 07

Output 10

Output 11
Output 12

Output 13

Output 14

Output 15
Output 16

Output 17

-dc

B

C

D

00

01
02
03

04

05
06

07
10

11

12

13

14

15

16

17

E

See applicable codes and laws.

+

dc Output

Device

_

The output device is
sinking current from
the module.

Sourcing Configuration

User

dc Supply

_

+

Actual wiring runs in this direction.

11915

You must supply dc at terminals A through D on the wiring arm. You need four dc
connections to accommodate the total required surge rating on the module without
overstressing any single connection on the field wiring arm. Jumper all dc connections
together to prevent module damage. Connect terminal E to dc common.

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dc (10…60V) Output Module 9

ATTENTION

IMPORTANT

Observe proper polarity, as indicated in the connection diagram on page 10 with dc
power connections. Reverse polarity, or application of ac voltage, could damage the
module.

You can use a dc (10…60V) output module (771-OBD series C) to directly drive
terminals on the following modules:

• dc (5…30V) input module (1771-IQ)

• dc (10…30V) input module (1771-IBD, 1771-IBN)

• dc (20…60V) input module (1771-ICD)

• dc (12…24V) input module (1771-IB)

• dc (24V) input module (1771-IQ16)

• dc (48V) input module (1771-IC)

Refer to Driving an Input with an Output Module on page for direct connection to a
1771-ICD input module.

IMPORTANT

Use the same dc supply to power both modules to make sure that ground is at the same
potential.

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10 dc (10…60V) Output Module

Driving an Input with an Output Module

dc (10…60V) Output Module dc (20…60V) Input Module

22…60V dc

+dc

+dc

+dc

+dc

Output 00

Output 01

Output 02

Output 03

Output 04

Output 05

Output 06

Output 07

Output 10

Output 11

Output 12

Output 13

Output 14

Output 15

Output 16

Output 17

-dc

1771-ICD1771-OBD

Not Used

Not Used

Not Used

Not Used

Input 00

Input 01

Input 02

Input 03

Input 04

Input 05

Input 06

Input 07

Input 10

Input 11

Input 12

Input 13

Input 14

Input 15

Input 16

Input 17

dc Common

Actual wiring runs in this direction.

See applicable codes and laws.

Publication 1771-IN054C-EN-P - November 2006

11916

dc (10…60V) Output Module 11

Interpreting the LED Indicators

The front panel of your module contains one green module active indicator, 16 red status
indicators, and one red fuse blown indicator.

The green module active indicator lights when the module is powered and the processor
keyswitch is in RUN mode. The indicator light turns off when the processor resets the
outputs.

The module active indicator must be on to properly interpret
the red status indicators. The red status indicators are
provided for indication of individual outputs. They indicate
the state to which the transistor is commanded by the

Module Active

ACTIVE
00
01
02
03
04

05
06
07

FUSE

10
11
12
13
14
15
16
17

Indicator (Green)

00…17 Status
Indicators (Red)

Fuse Blown
Indicators (Red)

processor and are powered by circuitry within the module. The indicators will turn on and off
as commanded by the processor. They do not indicate the presence or absence of dc power at
an output terminal.

The fuse blown indicator turns on when the fuse is blown. When the fuse blown indicator is
lit, check the fuse. After checking the fuse, make sure the field wiring arm is firmly in place.
Do this before checking the status of the other indicators.

processor and are powered by circuitry within the module.
The indicators will turn on and off as commanded by the
processor. They do not indicate the presence or absence of
dc power at an output terminal.

The module active indicator must be on to properly interpret
the red status indicators. The red status indicators are
provided for indication of individual outputs. They indicate
the state to which the transistor is commanded by the

Use this table to help you interpret the 1771-OBD status indicators and to troubleshoot
module and system faults.

Troubleshooting

Indicator Status Description Action

Module Active On (Green) Normal indication. None.

Module Active On (Green)
and Output Status On (Red)

Module Active On (Green)
and Output Status Off

Module Active Off and
Output Status On or Off
(Red)

Check voltage at output point on
swing arm.

If voltage is present, take no action. If no
voltage is present, replace module.

Output point not on in data table. None.

Module failure. Replace module.

Processor in Program mode. None.

Module not functioning properly. Check chassis power supply and processor.

If they are okay, replace module.

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12 dc (10…60V) Output Module

Replace the Fuse

An overload or short will cause the single onboard fuse to blow when the module output
exceeds 10 A. The onboard fuse does not protect the individual output transistors.

To replace the onboard fuse, do the following.

1. Turn off all power to the I/O chassis and all output device power to the field wiring
arm.

ATTENTION

Remove power from the 1771 I/O chassis backplane and field wiring arm before
removing or installing an I/O module.

• Failure to remove power from the backplane or wiring arm could cause module
damage, degradation of performance, or injury.

• Failure to remove power from the backplane could cause injury or equipment damage
due to possible unexpected operation.

2. Remove the module from the chassis and replace the blown fuse with a 10 A, 250V
rectifier fuse (1/4 x 1-1/4 inch), Littelfuse part number 322010.

The fuse is accessible through the side of the module.

WARNING

Failure to use the specified replacement fuse may cause module damage, degradation of
performance, or injury.

3. Replace the module in the chassis and attach the field wiring arm.

4. Turn system power on.

Publication 1771-IN054C-EN-P - November 2006

Hazardous Location Approvals

North American Hazardous Location Approval

dc (10…60V) Output Module 13

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.

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.

•S’assurer que l’environnement est
classé non dangereux avant de
changer les piles.

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14 dc (10…60V) Output Module

European Hazardous Location Approval

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.
Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN
60079-15.

IMPORTANT

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 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.

Publication 1771-IN054C-EN-P - November 2006

dc (10…60V) Output Module 15

Specifications

dc (10…60V) Output Module, 1771-OBD Series C

Attribute Value

Outputs per module 16 nonisolated

Module location 1771-A1B through 1771-A4B I/O chassis (Do not use this module

with 1771-A4 I/O chassis)

User supply voltage 10…60V dc

Voltage, on-state output, nom 48V dc

Current rating (see Derating Curve) 2 A per output resistive, not to exceed 8 A per module

Surge current, max 4 A per output for 10 ms, repeatable every 2 s

Load current, min 2.5 mA

On-state voltage drop (at rated
current), max

Off-state leakage current, max 0.5 mA

Output signal delay, max
Off to on
On to off

Power dissipation, max 15.6 W

Thermal dissipation, max 53.3 BTU/hr

Isolation voltage (continuous-voltage
withstand rating)

Backplane current, max 400 mA @ 5V dc

Conductors wire size

(1)

Category

Temperature code, IEC T3

Temperature code, North America T3C

Field wiring arm 1771-WH

Field wiring arm screw torque 1.0 Nm (9 lb-in)

Keying Between 10 and 12

(1)

Use this conductor category information for planning conductor routing. Refer to Industrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1.

(2)

Not suitable for Class I Division 2 Groups A, B, C, and D Hazardous Locations.

0.2 A per output pilot duty

25 A per output for 10 ms, repeatable every 2 s

1.5V dc

0.1 ms

0.2 ms

60V (continuous), Basic Insulation Type
Tested at 1000V ac for 60 s, I/O to system

0.34…2.5 mm2 (22…14 AWG) solid or stranded copper wire rated
at 120 °C (248 °F) or higher

1.2 mm (3/64 in.) insulation max
2 - on signal ports

1771-WHF (3 A fused)

1771-WHFB (1.5 A fused)

(2)

(2)

Between 22 and 24

Publication 1771-IN054C-EN-P - November 2006

16 dc (10…60V) Output Module

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):
0…60 °C (32…140 °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)

Relative humidity IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):

5…95% noncondensing

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

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

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

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:

Emissions CISPR 11:

Enclosure type rating None (open style)

2 g @ 10…500 Hz

30 g

50 g

4 kV indirect contact discharges

10 V/m with 1 kHz sine-wave 80% AM from 30…1000 MHz

±1 kV at 5 kHz on signal ports

±1 kV line-line (DM) and ±2 kV line-earth (CM) on signal ports

10V rms with 1 kHz sine-wave 80% AM from 150 kHz…30 MHz

Group 1, Class A (with appropriate enclosure)

Publication 1771-IN054C-EN-P - November 2006

Certifications

dc (10…60V) Output Module 17

Certification (when product is

(1)

marked)

Value

UL UL Listed Industrial Control Equipment. See UL File E65584

CSA CSA certified Process Control Equipment. See CSA file LR54689C.

CSA CSA certified Process Control Equipment for Class I, Division 2,

Groups A, B, C and D Hazardous locations. See CSA file LR69960C.

EEx European Union 94/9/EC Directive, compliant with:

EN 60079-15; 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

(1)

See the Product Certification link at www.ab.com for Declarations of Conformity, certificates, and other certification details.

Publication 1771-IN054C-EN-P - November 2006

18 dc (10…60V) Output Module

Derating Curve

9

8

7

6

5

4

3

2

Module Current - Amperes

1

0

0 1020 30 405060

Temperature (°C)

Publication 1771-IN054C-EN-P - November 2006

Notes:

dc (10…60V) Output Module 19

Publication 1771-IN054C-EN-P - November 2006

Rockwell Automation Support

Rockwell Automation provides technical information on the Web to assist you in using its
products. At http://support.rockwellautomation.com
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.

, you can find technical manuals, a

United States 1.440.646.3223

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

Monday – Friday, 8am – 5pm EST

support issues.

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, it may need to be
returned.

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

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

Allen-Bradley, Rockwell Automation, and TechConnect are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.

phone number above to obtain one) to your distributor in order to complete the return
process.

Publication 1771-IN054C-EN-P - November 2006 PN 953030-37

Supersedes Pub lication 1771-IN054B- EN-P - March 2003 Copyright © 2006 Rockwell Automation, I nc. All rights reserved . Printed in the U.S.A.