Installation Instructions
(Catalog Number 1771-OC)
This document provides information on:
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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.
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DC Output Driver Module
Allen–Bradley publication SGI–1.1, Safety Guidelines for
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.
WARNING
!
ATTENTION
!
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 about practices or
circumstances that may lead to personal injury or
death, property damage, or economic loss.
Identifies information that is critical for
IMPORTANT successful application and understanding of the
product.
DC Output Driver Module
ATTENTION
!
3
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 enclosures. 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 equipment.
This module contains the circuitry necessary to control the on/off
status of eight user devices. The devices can be:
• dc motor starters
• indicators
• solenoids
An output can drive an Allen–Bradley Size 4 motor starter, provided
its supply voltage does not drop below 92V ac. The maximum load
current the module can deliver is 1.5A per channel, not to exceed 8A
total per module.
4
DC Output Driver Module
Calculate Power
Requirements
The output module is powered by the power supply connected to the
I/O chassis backplane. The module requires a maximum current of
165mA from the +5V dc output of this supply. Total the current
requirements of this module with the other modules in the I/O
chassis to avoid overloading the supply or the I/O chassis backplane.
Determine Module
Placement
Group your modules to minimize adverse effects from radiated
electrical noise and/or 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
interference.
• Place analog input modules and other I/O modules sensitive to
heat away from slot power supplies and rack controllers to
minimize adverse heat effects.
ATTENTION
!
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, keep modules in appropriate
static–safe packaging.
The 1771–OC module is a modular component of the 1771 I/O
system requiring a properly installed system chassis. Refer to
publication 1771–IN075 for detailed information on acceptable
chassis, proper installation and grounding requirements. Limit the
maximum adjacent slot power dissipation to 10W maximum.
DC Output Driver Module
Place your module in any slot in the chassis
except the leftmost slot which is reserved for
processors or adapters.
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.
5
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DC Output Driver Module
ATTENTION
!
Remove power from the 1771 I/O chassis
backplane and 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.
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You make connections to the module through the 1771-WA field
wiring arm shipped with the module. The arm pivots on the chassis
to connect with the 8 terminals on the front of the module. The
wiring arm allows the module to be removed from the chassis
without disconnecting wiring.
1. Make certain all power is removed from the module before
making wiring connections.
2. Swing the wiring arm up into position on the front of the module.
The locking tab on the module will secure it into place.
3. Make your connections to the field wiring arm as shown in
Figure 1. (Use the label on the front of the wiring arm to identify
your wiring.)
The field wiring arm terminal identification
IMPORTANT number is not the same as the number of the bit
which controls that output.
You should identify the labels on the wiring arm with the name or
number of the device connected at each terminal.
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You must supply dc voltage to terminal A on the field wiring arm.
Supply dc common to output devices and terminal B on the field
wiring arm.
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DC Output Driver Module
ATTENTION
!
Proper polarity, as indicated in the connection
diagram, must be observed with dc power
connections. Reverse polarity, or application of a
voltage outside the product ratings may cause
damage to the module.
You can use an output of the 1771–OC module to drive an input of a
DC (48V) input module (1771–IC) to indicate status, such as the
turning on a motor starter (Figure 2).
Use the same dc power source to power both
IMPORTANT modules to ensure that ground is at the same
potential.
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9
The module has eight neon status indicators (Figure 3) that show the
state of each output. These indicators light when their corresponding
outputs are energized.
The module also has an indicator that displays a blown–fuse
condition at the respective output regardless of the state of the
output. This indicator is driven by your field device power supply.
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DC Output Driver Module
Each module output is individually fused. You can easily access the
module fuses by removing the front component–side cover.
!
Remove power from the 1771 I/O chassis
backplane and wiring arm before removing or
installing the module.
• Failure to remove power from the backplane or
field 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.
If a blown fuse occurs:
1. Turn off power to the I/O chassis backplane.
2. Pivot the wiring arm away from the module and pull the module
from the I/O chassis.
3. Remove the front half of the protective cover from the unlabeled
side of the module by removing the two slotted screws.
4. Replace the blown fuse with a 2A, 250V 8AG normal blow fuse.
5. Replace the protective cover and install the module in the I/O
chassis.
6. Reposition the wiring arm.
7. Restart system power.
DC Output Driver Module
Outputs per Module
8
Module Location
1771 I/O chassis
Output Voltage Range (user)
42 to 50V dc
Output Current Rating
1.5A per output - not to exceed 8A per module
Surge Current (maximum)
4A for 1ms, repeatable every 1s
On State Voltage Drop
2V dc (maximum)
Off State Leakage Current (max.)
5mA per output @ 120V ac
Power Dissipation
16.9 Watts (max.), 0.9 Watts (min.)
Thermal Dissipation
57.6 BTU/hr (max.), 3.0 BTU/hr (min.)
Adjacent Slot Power Dissipation
10 Watts
Backplane Current
165mA @ 5V dc 5%
Opto-electrical Isolation
Tested to withstand 1000V ac for 60s
11
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)
32 to 140°F (0 to 60°C)
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 185°F (-40 to 85°C)
Relative Humidity
IEC 60068-2-30 (Test Db, Unpackaged, Nonoperating Damp Heat)
5 to 95% noncondensing
Shock
Operating
Nonoperating
IEC 60068-2-27 (Test Ea, Unpackaged Shock)
30g
50g
Vibration
IEC 60068-2-6 (Test Fc, Operating)
2g @ 10-500Hz
Enclosure Type Rating
None (open style)
Keying
Between 4 and 6
Between 20 and 22
Fuses
2A, 250V Bussman AGC2 fuse
Field Wiring Arm
Cat. No. 1771-WA
Field Wiring Arm Screw Torque
7-9 pound-inches (0.8-1.0Nm)
Conductors
14-22AWG (2.5-0.25mm2) stranded copper wire rated at 75oC or
greater1
3/64 inch (1.2mm) insulation (max)
12
Wire Size
Category
Publication 1771-IN076A-EN-P - October 2002
12
DC Output Driver Module
Certifications
(when product is marked)
UL
UL Listed Industrial Control Equipment
CSA
CE3
CSA Certified Process Control Equipment
European Union 89/336/EEC EMC Directive,
compliant with:
EN 50082-2, Industrial Immunity
EN 61000-6-2, Industrial Immunity
EN 61000-6-4, Industrial Emissions
C-Tick3 Australian Radiocommunications Act, compliant with:
AS/NZS 2064, Industrial Emissions
1
One or two 14-22 AWG solid or stranded copper wires per terminal. Must be same size. Do not intermix solid and stranded wires.
Use copper wire only.
Use this conductor category information for planning conductor routing . Refer to publication 1770Ć4.1, Industrial Automation Wiring and
Grounding Guidelines."
3 See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates and other certification details
2
Corporate Headquarters
Rockwell Automation, 777 East Wisconsin Avenue, Suite 1400, Milwaukee, WI 53202-5302 USA, Tel: (1) 414.212.5200, Fax: (1) 414.212.5201
Headquarters for Allen-Bradley Products, Rockwell Software Products and Global Manufacturing Solutions
Americas: Rockwell Automation, 1201 South Second Street, Milwaukee, WI 53204-2496 USA Tel: (1) 414.382.2000, Fax: (1) 414.382.4444
Europe: Rockwell Automation SA/NV, Vorstlaan/Boulevard du Souverain 36-BP 3A/B, 1170 Brussels, Belgium, Tel: (32) 2 663 0600, Fax: (32) 2 663 0640
Asia Pacific: Rockwell Automation, 27/F Citicorp Centre, 18 Whitfield Road, Causeway Bay, Hong Kong, Tel: (852) 2887 4788, Fax: (852) 2508 1846
Headquarters for Dodge and Reliance Electric Products
Americas: Rockwell Automation, 6040 Ponders Court, Greenville, SC 29615-4617 USA, Tel: (1) 864.297.4800, Fax: (1) 864.281.2433
Europe/Middle East/Africa: Rockwell Automation, Brühlstraße 22, D-74834 Elztal-Dallau, Germany, Tel: (49) 6261 9410, Fax: (49) 6261 1774
Asia Pacific: Rockwell Automation, 55 Newton Road, #11-01/02 Revenue House, Singapore 307987, Tel: (65) 351 6723, Fax: (65) 355 1733
Publication 1771-IN076A-EN-P - October 2002
Supersedes Publication 1771Ć2.175 - June 1990
Publication 1771-IN076A-EN-P - October 2002
PN957689-10
Copyright 2002 Rockwell International, Inc. Printed in USA
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