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.

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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