Rockwell Automation 1771-OP User Manual

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Installation Instructions

Protected AC Output Module

(Catalog Number 1771-OP)

To The Installer

Important User Information

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 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.

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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

IMPORTANT

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 successful application and understanding of the product.

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ATTENTION

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.

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Pre-installation Considerations

Calculate Power Requirements

Determine Module Placement

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

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:

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.

• 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.

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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.

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

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.

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

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Install the Module and Field Wiring Arm

1771ĆA1B, ĆA2B, ĆA3B, ĆA3B1, ĆA4B I/O chassis

locking tab

card guides

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.

1771ĆA1B, ĆA2B, ĆA3B1, ĆA4B Series B I/O chassis

locking bar pin

locking bar

card guides

Snap the chassis latch over the top of the module to secure it.

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.

Connect Wiring to the Module

Module

Swing the chassis locking bar down into place to secure the modules. Make sure the locking pins engage.

wiring arm

1771ĆWA

remove

horizontal bar

install

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.

19809

17643

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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

120V ac High

ac Device controlled by termiĆ nal

Not used

Output 00

Output 01

Output 02

Output 03

Not used

(Actual wiring runs in this direction.)

Connect the high side of incoming power to the L1 terminal, and the low side to the L2 terminal.

ac Low

11884-I

ATTENTION

Paralleling outputs may result in damage to the module.

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Protected AC (120V) Output Module

1771-OP

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.

Figure 2 Using an Output Module to drive an Input Module

AC (120V) Input Module

1771-IA

Protected AC (120V) Output Module

1771-OP

AC/DC (120V) Input Module

1771-IAD

ac High

Typically

2.5K ohm 10 Watt Resistor

ac Low

ac High

Typically

2.5K ohm 10 Watt Resistor

ac Low

11885-I

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Interpreting the Status Indicators

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

FUSE BLOWN Red Illuminates when an output fuse has

OUTPUT (4 total; one per output)

Red Show on/off state of outputs. When

has failed shorted and causes the output fuse to open.

opened.

the output is on, the associated indicator is on.

Figure 3 Status Indicators

Normally off

On or off, as determined by the state of the output.

Triac Failure

Fuse Blown - lights when any fuse in the module blows. Output 0 Output 1 Output 2 Output 3 Not used Not used

Not used

Each indicator lights when its output is ON.

11886-I

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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.

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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

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(0to60°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 Wire Size

Rockwell Automation 1771-OP User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual