Allen-Bradley 1771-OW User manual

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Selectable Contact Output Module

Cat. No. 1771–OW

This document provides information on:

•important pre–installation considerations

•power supply requirements

•installing the module

•connecting the wiring

•using the indicators on the module for troubleshooting

•module specifications

These modules do not contain surge limiting circuitry. Use these

modules for switching resistive loads only. They are not

recommended for inductive or capacitive loads.

The outputs are arranged in 4 groups of 2, each group with its own

common. Each output is electrically isolated from module logic

circuitry. The module can simultaneously switch all 8 outputs to

separate loads, each conducting a maximum load of 1.0A

continuously, at rated power. Ac loads switched by the modules

should have a power factor (PF) of 1.0.

Maximum interconnect cable length for these modules is 1000 ft.

(304.8 meters).

The controller or I/O chassis power supply, connected through the

backplane of the I/O chassis, powers the logic circuitry of the contact

output modules. This supply also provides the necessary power to

energize the coils of the module relays. The maximum current drawn

from this supply when all coils are energized is 700mA.

In this section we tell you how to initially handle your module, key

your I/O chassis, set the relay output jumpers, install your module

and make your wiring connections.

Installation Instructions

To The Installer

Pre–installation

Considerations

Power Supply

Requirements

Installing Your Module

Selectable Contact Output Module2

Publication

1771-2.1

10 – December 1989

Initial Handling Procedures

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 wir-

ing 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.

The contact output module contains components which can be

damaged by electrostatic discharge. The module is shipped in an

electrostatic shielded bag for protection. Follow the handling

procedures outlined below to guard against damage to your module.

•Touch a grounded object to discharge yourself before handling

the module.

•Do not touch the backplane connector or connector pins.

•If you configure or replace internal components, do not touch

other circuit components inside the module. If available, use a

static–safe work station.

•When not in use, keep the module in its static–free shield bag.

Keying the I/O Chassis

Use the plastic keying bands, shipped with each I/O chassis, to key

your I/O slots to accept only this type of module. Place the keying

bands on the chassis backplane between:

•6 and 8

•16 and 18

Slots on the rear edge of the circuit board are matched to these slots

to allow insertion of this type of module. You can key any connector

in an I/O chassis to receive this module except for the leftmost

connector reserved for adapter or processor modules.

Setting the Relay Output Jumpers

When the output image table bit at the address corresponding to any

output is energized (set to 1), the corresponding relay contact is

closed or opened, respective to the jumper setting.

Selectable Contact Output Module

Publication

1771-2.1

10 – December 1989

All outputs are individually selectable for either normally–open or

normally–closed operation. They are pre–set for normally–open

operation at the factory. To reset any jumper, proceed as follows:

1. Remove the 4 screws from the side cover and separate the circuit

board from the 2 covers.

2. Move the jumper to the desired position (see below). Jumpers are

identified by jumper number and use (N.O. or N.C.).

3. Reinstall the circuit board in the module and replace the cover.

Figure 1

Relay

Output Jumper Setting

N.O.1

N.C.1

N.O.1

N.C.1

Normally Open

Normally Closed

Printed Circuit Board

K1 K2

K3 K4

N.O.1

N.O.2

N.O.3

N.O.4

N.C.1

N.C.2

N.C.3

N.C.4

11928–I

Inserting the Module Into the Chassis

1. Position the module so that the circuit board on the rear of the

module lines up with the top and bottom card guides in the

chassis.

2. Slide the module into the chassis.

3. Press firmly to seat the module in the chassis backplane

connector.

4. Swing the module locking latch down into place over the front

edge of the module.

Selectable Contact Output Module4

Publication

1771-2.1

10 – December 1989

Connecting Wiring to the Module

You make connections to the module through the field wiring arm

cat. no. 1771–WD. The arm pivots on the I/O chassis to connect with

terminals on the front of the module and acts as a terminal strip. 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 below.

(Use the label on the front of the wiring arm to identify your

wiring.)

ATTENTION: The field wiring arm terminal

identification number is not the same as the number of

the bit which controls that output.

Connection Diagram for the Selectable Contact Output Module

(Cat. No. 1771–OW)

Common

Output 0 (N.O.)

Output 1 (N.O.)

Output 2 (N.O.)

Output 3 (N.O.)

Output 4 (N.O.)

Output 5 (N.O.)

Output 6 (N.O.)

Output 7 (N.O.)

L1 L2

120V ac

24V dc +Common

Note: Contacts are shown in N.O. configuration for

simplicity. Placement of each relay’s jumper sets N.O. or N.C.

operation.

(Actual wiring runs in this direction.) 11929–I

Selectable Contact Output Module

Publication

1771-2.1

10 – December 1989

Connection Diagram for the 1771–OW Selectable Contact

Output Module Driving a 120V ac Input Module

Common

Output 0

Output 1

Output 2

Output 3

Output 4

Output 5

Output 6

Output 7

ac High

ac Low

Selectable Contact

1771–OW

120V AC Input Module

1771–IAD

Output Module

Input 00

Input 01

Input 02

Input 03

Input 04

Input 05

Input 06

Input 07

Input 10

Input 16

Input 11

Input 12

Input 13

Input 14

Input 15

Input 17

11930–I

ATTENTION: Do not attempt to increase load

current or wattage capability beyond the rating by

connecting two or more outputs in parallel. The

slightest variation in output relay switching time may

cause one set of contacts to switch the total load

current.

The module has 8 status indicators on the module front plate. These

represent the control status of the output relays. Each indicator is lit

when its corresponding relay is energized.

Not used

Output 0

Output 1

Output 2

Output 3

Output 4

Output 5

Output 6

Output 7

Status Indicators

11931–I

Interpreting the Status

Indicators

Specifications

Selectable Contact Output Module6

Publication

1771-2.1

10 – December 1989

Outputs per Module 8 (4 groups of 2)

Module Location 1771 I/O chassis

Voltage Rating 24 – 138V ac RMS

24 – 125V dc

Current Rating11A per output (maximum)2

Surge Current 1A maximum per output (at rated power)

Power Rating dc: 30W per output (resistive)

ac (suppressed)1: 30W per output (resistive)

Minimum Contact Load dc: 10mA @ 24V

ac: 10mA @ 24V

Operate/Release Time 5ms maximum

Bounce Time 1ms maximum

Switching Frequency 10Hz maximum

Power Dissipation 3.7 Watts (max.); 3.3 Watts (min.)

Thermal Dissipation 12.6 BTU/hr (max.); 11.3 BTU/hr (min.)

Backplane Current 700mA maximum

Conductors Wire Size

Category

14 gauge stranded maximum

3/64 inch insulation maximum

Environmental Conditions

Operating Temperature

Storage Temperature

Relative Humidity

0 to 60oC (32 to 140oF)

–40 to 85oC (–40 to 185oF)

5 to 95% (without condensation)

Keying Between 6 and 8

Between 16 and 18

Field Wiring Arm 1771–WD

Wiring Arm Screw Torque 7-9 inch-pounds

1Spikes,

peaks and surges must be within the power rating. Resistive loads only

. AC or DC power = 30W max.

Surge limiting circuitry is not provided in the module. For reliable operation, the user must ensure that surges do

not exceed either the voltage or current rating of the module.

Refer to publication 1770–4.1, Programmable Controller Wiring and Grounding Guidelines.

Allen-Bradley, a Rockwell Automation Business, has been helping its customers improve

productivity and quality for more than 90 years. We design, manufacture and support a broad

range of automation products worldwide. They include logic processors, power and motion

control devices, operator interfaces, sensors and a variety of software. Rockwell is one of the

world’s leading technology companies.

Worldwiderepresentation.

Argentina

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Chile

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China, PRC

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urkey

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ugoslavia

Allen-Bradley Headquarters, 1201 South Second Street, Milwaukee, WI 53204 USA, Tel: (1) 414 382-2000 Fax: (1) 414 382-4444

Publication

1771–2.1

10 – December 1989

Supersedes

publication 1771–2.110 – November 1987

P/N

955106–84

Printed

in USA

Looking for more information?

Visit

on the

web

at http://www.artisan-scientific.com for more information:

•

Price

Quotations •

Drivers·

Technical

Specifications.

Manuals and Documentation

Artisan

Scientific

You~

Source

for:

Quality

New

and

Certified-Used/Pre:-awned ECJuiflment

•

Tens

Thousands

In-Stock

Items

•

Hundreds

Manufacturers

Supported

•

Fast

Shipping and

DelIve1y

•

Leasing

/Monthly

Rentals

•Equipment Demos

•

Consignment

Service Center Repairs

Experienced Engineers and Technicians

staff

our

State-of-the-art Full-Service In-House Service Center Facility

InstraView Remote Inspection

Remotely inspect equipment before purchasing with

our

Innovative InstraView-website at http://www.instraview.com

bUy

used

equipment!

also

offer

credit

for

Buy-Backs

and

Trade-Ins

Sell

your

excess.

underutilized. and idle used equipment. Contact one

our

Customer

Service

Representatives todayl

Talk to alive person: 88EM38-S0URCE fB88-887-68721 IContact

email: [email protected] IVisit ourwebsite: http://www.artisan-scientific.com

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