Installation Instructions
Protected AC Output Module
(Catalog Number 1771-OP)
To The Installer
This document provides information on:
To
See page
Important User Information
1
Pre-installation Considerations
4
Calculate Power Requirements
4
Determine Module Placement
4
Prevent Electrostatic Discharge
5
Key the Backplane Connector
5
Install the Module and Field Wiring Arm
6
Connect Wiring to the Module
6
For this reference information
Important User
Information
See page
Interpreting the Status Indicators
9
Replacing a Fuse
10
Specifications
11
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.
Publication 1771-IN077A-EN-P - October 2002
2
Protected AC Output 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.
Publication 1771-IN077A-EN-P - October 2002
Protected AC Output Module
ATTENTION
!
3
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 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.
Publication 1771-IN077A-EN-P - October 2002
4
Protected AC Output Module
Pre-installation
Considerations
An output can drive an Allen–Bradley Size 5 motor starter, provided
its supply voltage does not drop below 92V ac. The maximum load
current the module can deliver is 2A per channel, not to exceed 6A
total per module.
ATTENTION
!
Calculate Power
Requirements
Determine Module
Placement
When using a remote I/O system with a PLC
processor, use only the 1771-AS or 1771-AR
remote I/O adapter module which is series B or
later. These remote I/O adapters add additional
capability for shorted data bus detection. Failure
to use series B or later remote I/O adapters may
result in damage to equipment and/or personal
injury.
The output module is powered by the power supply connected to the
I/O chassis backplane. The module requires a maximum current of
210mA 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.
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.
The 1771–OP 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.
Publication 1771-IN077A-EN-P - October 2002
Protected AC Output Module
ATTENTION
!
Key the Backplane Connector
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
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.
Position the keying bands in the backplane connectors to correspond to
the key slots on the module.
Place the keying bands:
- between 6 and 8
- between 26 and 28
I/O chassis
Upper
Connector
You can change the position of these bands if
subsequent system design and rewiring makes
insertion of a different type of module necessary.
11022ĆI
Publication 1771-IN077A-EN-P - October 2002
6
Protected AC Output Module
Install the Module and Field
Wiring Arm
ATTENTION
!
1
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.
1771ĆA1B, ĆA2B, ĆA3B, ĆA3B1, ĆA4B I/O chassis
1771ĆA1B, ĆA2B, ĆA3B1, ĆA4B Series B I/O chassis
locking tab
locking bar
locking bar pin
card guides
card guides
Module
Snap the chassis latch over
the top of the module to secure it.
2
Module
Swing the chassis locking bar down into place to secure
the modules. Make sure the locking pins engage.
19809
wiring arm
Attach the wiring arm (1771ĆWA) to the horizontal
bar at the bottom of the I/O chassis.
The wiring arm pivots upward and connects with
the module so you can install or remove the
module without disconnecting the wires.
1771ĆWA
remove
horizontal bar
Connect Wiring to the
Module
Publication 1771-IN077A-EN-P - October 2002
install
17643
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.
Protected AC Output Module
7
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.
Figure 1
Connection Diagram for the 1771ĆOP Protected Output Module
L1
L1
A
Not used
O
Not used
1
Output 00
2
Output 01
3
Output 02
4
Output 03
5
Not used
6
Not used
7
L2
B
120V ac High
ac Device
controlled by termiĆ
nal
L2
ac Low
(Actual wiring runs in this direction.)
11884-I
Connect the high side of incoming power to the L1 terminal, and the
low side to the L2 terminal.
ATTENTION
Paralleling outputs may result in damage to the
module.
!
Publication 1771-IN077A-EN-P - October 2002
8
Protected AC Output Module
You can use an output of the 1771–OP module to drive an input of a
120V AC input module (1771–IA, –IA2, –ID and –IAD) to indicate
status, such as the turning on a motor starter (Figure 2). Both
modules must be powered by the same ac source. In addition, you
must add an external resistor between the output terminal and the
common (L2) (Figure 2). Typically, this is a 2.5K ohm, 10W resistor.
Protected AC (120V) Output Module
1771-OP
L1
A
AC (120V) Input Module
1771-IA
A
Protected AC (120V) Output Module
1771-OP
L1
A
O
O
O
1
1
1
2
2
2
3
3
3
4
4
4
5
5
6
6
7
7
5
6
7
L2
L1
ac High
Figure 2
Using an Output Module to drive an Input Module
B
Typically
2.5K ohm
10 Watt
Resistor
L2
ac Low
B
L2
AC/DC (120V) Input Module
1771-IAD
L1
ac High
Typically
2.5K ohm
10 Watt
Resistor
B
L2
ac Low
11885-I
Publication 1771-IN077A-EN-P - October 2002
Protected AC Output Module
Interpreting the Status
Indicators
9
The module has 4 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.
The module also has a triac failure indicator. If this light comes on,
return the module to the factory for repair.
Indicator
Color
Explanation
Condition
TRIAC FAIL
Red
Illuminates when one of the triacs
has failed shorted and causes the
output fuse to open.
Normally off
FUSE BLOWN
Red
Illuminates when an output fuse has
opened.
Normally off
OUTPUT (4 total; one
per output)
Red
Show on/off state of outputs. When
the output is on, the associated
indicator is on.
On or off, as determined
by the state of the
output.
Figure 3
Status Indicators
Triac Failure
Fuse Blown - lights when any fuse in the module blows.
Output 0
Output 1
Each indicator lights when its output is ON.
Output 2
Output 3
Not used
Not used
Not used
11886-I
Publication 1771-IN077A-EN-P - October 2002
10
Protected AC Output Module
Replacing a Fuse
The output of this module is fused to open the output circuit under an
overload or a shorted output triac condition. You can easily access
the module fuse by removing the front component–side cover.
ATTENTION
!
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 5A, 250V Bussman MTH5, IEC
127 Type F fuse.
5. Replace the protective cover and install the module in the I/O
chassis.
6. Reposition the wiring arm.
7. Restart system power.
Publication 1771-IN077A-EN-P - October 2002
Protected AC Output Module
Specifications
Outputs per Module
8
Module Location
1771 I/O chassis
Output Voltage Range
92 to 138V ac @ 47 - 63Hz
Output Current Rating
1.5A per output - not to exceed 6A per module
Surge Current (maximum)
4A per output for 8.3ms at 120V ac, repeatable every 1s
Minimum Load Current
50mA per output @ 120V ac, 60Hz
On State Voltage Drop
2V at 100mA
Off State Leakage Current (max.)
5mA per output @ 120V ac
Power Dissipation
10.7 Watts (max.), 1.1 Watts (min.)
Thermal Dissipation
36.6 BTU/hr (max.), 3.4 BTU/hr (min.)
Adjacent Slot Power Dissipation
10 Watts maximum
Backplane Current
210mA @ 5V dc 5%
Opto-electrical Isolation
Tested to 1500V ac rms for 1s
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 6 and 8
Between 26 and 28
Fuses
5A, 250V Bussman MTH5, IEC 127 Type F
Field Wiring Arm
Cat. No. 1771-WA
Field Wiring Arm Screw Torque
7-9 pound-inches (0.7-1.0Nm)
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
Certifications
(when product is marked)
UL
UL Listed Industrial Control Equipment
CSA
CSA Certified Process Control Equipment
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.
2 Use this conductor category information for planning conductor routing . Refer to publication 1770Ć4.1, Industrial Automation Wiring and
Grounding Guidelines."
Publication 1771-IN077A-EN-P - October 2002
Publication 1771-IN077A-EN-P - October 2002
Supersedes Publication 1771Ć2.23 - June 1990
PN957689-11
Copyright 2002 Rockwell International, Inc. Printed in USA
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