Allen-Bradley Series B Manual de usuario

AC (12-120V) Output Module

Cat. No. 1771-OAD Series B

Installation Instructions

This document provides information on:

important pre-installation considerations

power supply requirements

installing the module

using the indicators for troubleshooting

replacing the fuse

module specifications

The 1771-OAD Series B module is compatible with all chassis except

1771-A1, 1771-A2 and 1771-A4 chassis. Make sure no other output module

or single card block transfer module is placed in the same module group

when using 2-slot addressing. Any discrete input module may be used

within the same module group.

Your module receives its power through the 1771 I/O chassis backplane from

the chassis power supply. The module requires 295mA from the output of this

supply. Add this to the requirements of all other modules in the I/O chassis to

prevent overloading the chassis backplane and/or chassis power supply.

The ac output module is shipped in a static-shielded bag to guard against

electrostatic discharge damage. Observe the following precautions when

handling the module.

Electrostatic Discharge Damage

ATTENTION: Under some conditions, electrostatic discharge

can degrade performance or damage the module. Observe the

following precautions to guard against electrostatic damage.

Wear an approved wrist strap grounding device, or touch a grounded

object to discharge yourself before handling the module.

Do not touch the backplane connector or connector pins.

To The Installer

Pre-installation Considerations

Power Requirements

Initial Handling

AC (12–120V) Output Module

Cat. No. 1771-OAD Series B

Installation Instructions

If you configure or replace internal components, do not touch other circuit

components inside the module. If available, use a static-free work station.

When not in use, keep the module in its static-shielded bag.

In this section we tell you how to:

change the mode of the fuse-blown jumper

key your I/O chassis

install your module

make your wiring connections

Changing the Mode of the Fuse-blown Jumper

The fuse-blown jumper has two modes:

the preset, standard (STD) mode – displays the fuse status on the red

fuse-blown status indicator

the customer side indication (CSI) mode – displays the fuse status in

the input image table and on the red fuse-blown status indicator. This

mode configures the module as a 16 point output module that utilizes

both the output and input image data tables of your controller.

When a fuse blows, all 16 bits in the associated input image table will

turn on (1).

For example, if you install the module in a PLC-5 system and address

the module as O:012, then the fuse status bits are in I:012.

To monitor the status of the module fuse, make certain that your user program

monitors the module’s input image table for ‘‘on” bits.

Important: Do not put the module jumper in CSI mode when you use

this module in a complementary mode. Your system will not operate

properly.

To change the fuse blown jumper to the CSI mode, do the following:

1. Locate the fuse-blown jumper at the top-right edge of the module

circuit board, as shown in the following figure.

2. Use your finger to slide the jumper off the STD position (the middle

post and the left post).

3. Carefully reposition the jumper by sliding it onto the CSI position (the

middle post and the right post).

STD CSI

Fuse Blown Jumper

(shown in preset

STD position)

Top-right edge of circuit board

12636-I

Installing Your Module

AC (12–120V) Output Module

Cat. No. 1771-OAD Series B

Installation Instructions

Keying Your I/O Chassis

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

slots to accept only this type of module.

The module circuit board is slotted in two places on the rear edge. The

position of the keying bands on the backplane connector must correspond to

these slots to allow insertion of the module. You can key any connector in an

I/O chassis to receive this module except for the left-most connector

reserved for adapter or processor modules. Place keying bands between the

following numbers labeled on the backplane connector:

Between 10 and 12

Between 20 and 22

You can change the position of these keys if system redesign and rewiring

makes insertion of a different module necessary.

Installing the Output Module

To install the ac output module in your 1771 I/O chassis, follow the steps

listed below.

ATTENTION: Remove power from the 1771 I/O chassis

backplane and field wiring arm before removing or installing an

I/O 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.

1. Turn off power to the I/O chassis.

2. Place the printed circuit board on the rear module in the plastic tracks

at the top and bottom of the slot that guide the module into position.

3. Do not force the module into its backplane connector. Apply firm, even

pressure on the module to seat it properly.

4. Snap the chassis latch over the top of the module to secure its position.

5. Connect the field wiring arm to the module.

6. Make wiring connections to the field wiring arm as indicated in Figure 1.

AC (12–120V) Output Module

Cat. No. 1771-OAD Series B

Installation Instructions

Connecting Wiring to the Output Module

Connections to the output module are made to the field wiring arm (cat. no.

1771-WH) shipped with the module. An optional fused field wiring arm is

available (cat. no. 1771-WHF) which provides individual fusing for each

circuit. Attach the field wiring arm to the pivot bar on the bottom of the I/O

chassis. The field wiring arm pivots upward and connects with the module

so you can install or remove the module without disconnecting the wires.

Refer to Figure 1. You must supply ac (L1) at terminals A through D on the

field wiring arm. You need four ac connections to accommodate the total

required surge rating on the module without overstressing any single

connection on the field wiring arm. Jumper all ac (L1) connections together

to prevent module damage.

Figure 1

Connection

Diagram

(Actual wiring runs in this direction.)

L2/optional

ac High

ac Low

Output 00

Output 01

Output 02

Output 03

Output 04

Output 05

Output 06

Output 07

Output 10

Output 11

Output 12

Output 13

Output 14

Output 15

Output 16

Output 17

Output

Device

12223–I

Field WiringArm

Cat. No. 1771-WH

AC (12–120V) Output Module

Cat. No. 1771-OAD Series B

Installation Instructions

Important: You can use an AC (120V) Output Module (cat. no.

1771-OAD) to directly drive terminals on an AC/DC (120V) Input Module

(cat. no. 1771-IAD) (Figure 2).

Figure 2

Driving

an Input Module with an Output Module

120V ac High

ac Low

(Cat. No. 1771-IA)

ac Low

2500 ohm 10W

resistor

ac/dc (120V)

Input Module

ac (12-120V)

Output Module

(Cat. No. 1771-OAD)

120V ac High

ac (12-120V)

Output Module

(Cat. No. 1771-OAD) (Cat. No. 1771-IAD)

ac/dc (120V)

Input Module

12224–I

You can also use a 1771-OAD Output module to drive an AC/DC (120V)

Input Module (cat. no. 1771-IA) but you must connect one of the following

between the output terminal and L2 (common) as shown in Figure 2.

2500 ohm, 10W resistor

RG-1676-1 Electrocube (San Gabriel, California)

Use the same ac power source to power both modules to ensure proper

phasing and prevent module damage.

AC (12–120V) Output Module

Cat. No. 1771-OAD Series B

Installation Instructions

The front panel has one green module active indicator, 16 red status

indicators, and one red fuse-blown indicator (Figure 3).

The green module active indicator lights when:

the rack power supply has properly established 5V dc, and

the processor is placed in run mode

When the module is in the CSI mode, the green module active indicator

lights only when the rack power supply has properly established 5V dc.

To properly interpret the red status indicators, the module active indicator

must be lit.

The status indicators are provided for system logic side indication of

individual outputs. When a status indicator lights, voltage is present at the

output terminal.

The fuse-blown indicator lights when the fuse has blown or been cleared.

Figure 3

Status

Indicators

ACTIVE

Module Active Indicator (green)

00 to 17 Status Indicators (red)

FUSE Fuse Blown Indicator (red)

12225–I

The module’s output circuitry is protected from overload or shorts by a fuse.

You can replace the fuse as outlined below.

1. Turn off all power to the I/O chassis and all output device power to the

field wiring arm.

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.

Interpreting the Status

Indicators

Replacing the Fuse

AC (12–120V) Output Module

Cat. No. 1771-OAD Series B

Installation Instructions

2. Remove the module from the chassis and replace the blown fuse with a

10A, 250V rectifier fuse (1/4 x 1-1/4 inch), Littelfuse part number

322010.

3. Replace the module in the chassis and attach the field wiring arm.

4. Turn OFF all outputs to the module.

5. Turn ON power to the I/O chassis only.

6. Check that the red status indicators on the front of the module

(Figure 3) are off (no outputs on).

7. Turn on output device power to the field wiring arm.

8. Start with bit 00 and turn on individual outputs one at a time. Turn off

the previous output before turning on the next output.

9. If the red fuse blown indicator turns on, note which output is faulty and

trace the output wiring to the faulty device.

After correcting the fault problem, return to step 1 and begin again. If you

cannot locate a faulty output, return to step 8 and turn on 2 or more outputs

at the same time. Total output current should not exceed 2A per output, or

8A total per module.

Use this table to help you interpret the 1771-OAD status indicators and to

troubleshoot module and system faults.

Indicator Status Description of Fault or System Status Action to Take

Module active ON (green) Normal Indication. None.

Module active ON (green) and

Output status ON (red) Check voltage at output point on swing arm. If voltage is present, take no action. If no

voltage is present, check the fuse. If the fuse

is OK, replace the module.

Module active ON (green) and

Output status OFF No voltage. None.

Voltage on terminal. Replace the module.

Module active OFF and

Output status ON (red) or OFF 1. Processor is in program mode.

2. Module not functioning properly.

1. If module is in normal mode, take no

action. If module is in CSI mode replace

module.

2. Check the chassis power supply and

processor. If they are OK, replace the

module.

Fuse blown (red) Outputs will not turn on. Replace the fuse. If fuse replacement does

not correct the problem, replace the module.

Troubleshooting

Specifications

AC (12–120V) Output Module

Cat. No. 1771-OAD Series B

Installation Instructions

Outputs per Module 16

Module Location 1771-A1B through -A4B or later I/O chassis, 1771-AM1, -AM2 chassis

Output Voltage Range 10 to 138V ac @ 47 - 63Hz

Output Current Rating 2A per output – not to exceed 8A per module

Surge Current (maximum) 25A per output for 100ms, repeatable every 1 second

25A per module for 100ms, repeatable every 1 second

Minimum Load Current 5mA per output

On State Voltage Drop (max.) 1.5V at load current > 50mA

5.8V at load current < 50mA

Off State Leakage Current (max.) 3.0mA per output @ 138V ac

Signal Delay (max.) Off to On

On to Off Zero crossing 8.3ms @ 60Hz, 10.0ms @ 50Hz

Zero crossing 8.3ms @ 60Hz, 10.0ms @ 50Hz

Power Dissipation 13 Watts (max.), 1.5 Watts (min.)

Thermal Dissipation 48.0 BTU/hr (max.), 5.13 BTU/hr (min.)

Backplane Current 295mA

Isolation Voltage Tested at 2500V dc for 1 second per UL508 & CSA C22.2 #142

Environmental Conditions

Operational Temperature

Storage Temperature

Relative Humidity

0oto 60oC (32oto 140oF)

–40oto 85oC (–40oto 185oF)

5 to 95% (without condensation)

Conductors Wire Size

Category

14 gauge stranded maximum

3/64 inch insulation maximum

Keying Between 10 and 12

Between 20 and 22

Fuse 10A, 250V rectifier fuse (1/4 x 1-1/4 inch), Littelfuse PN 322010

Field Wiring Arm Standard

Optional Catalog Number 1771-WH

Catalog Number 1771-WHF (fused)

Wiring Arm Screw Torque 7-9 inch-pounds

Relay Compatibility 700–HC14A1 700–HC14A1–4 700–HT12AA1 700–HF32A1 700–HTM12RA1

700–HP32A1–4 700–HB32A1 700–CL110A1 700–R110A1 100–A09

100–A30 100–A18 700–RT10N100A1 700–CL220A1 700–C110A1

You

use this conductor-category information for planning conductor routing as described in the system-level installation manual.

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orld Headquarters, Allen-Bradley

, 1201 South Second Street, Milwaukee, WI 53204 USA, T

el: (1) 414 382-2000 Fax: (1) 414 382-4444

Allen-Bradley has been helping its customers improve productivity and quality for 90 years.

A-B designs, manufactures and supports a broad range of control and automation products

worldwide. They include logic processors, power and motion control devices, man-machine

interfaces and sensors. Allen-Bradley is a subsidiary of Rockwell International, one of the

world’s leading technology companies.

Publication

1771-2.74 November 1993

Supersedes

Publication 1771-2.74 April 1992

9551

15-84

1993 Allen-Bradley Company, Inc. Printed in USA

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