Allen-Bradley 1771-ODD Manuale utente

AC (120V) Isolated Output Module,

16 Outputs

Cat. No. 1771ODD

Installation Instructions

This document provides information on:

important pre-installation considerations

power supply requirements

installing the module

installing and connecting the wiring

replacing the fuse

using the module indicators for troubleshooting

module specifications

An output from this module 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 8A total per module.

Your module’s outputs can drive the following motor starter combinations:

16 size 3 motor starters (1 per output)

10 size 4 motor starters (1 per output)

7 size 5 motor starters (1 per output)

The switching device in the output circuit is a solid-state triac. There is a

small leakage current in the off state due to both triac and capacitive

characteristics. The maximum leakage current per output is 3mA at 138V

ac. Nominal leakage current is 1.5mA. The on-state voltage drop across

the output terminals will not exceed 1.5V ac at 2A.

To The Installer

Preinstallation

Considerations

AC (120V) Output Module

(Cat. No. 1771-ODD)

Installation Instructions

The 1771-ODD module is designed for a 10mA minimum current on each

output circuit. The total continuous current the module supports is 8A (2A

maximum per channel). If this rating is exceeded, the module overheats

and damage may occur.

Suppression

Surge suppression circuitry is provided for the output triacs in this module.

To suppress high-voltage transients from the ac line, a metal-oxide varistor

(MOV) is provided between each set of terminals on the module. In each

output circuit an RC network limits the magnitude of voltage transients

that may occur when a device is wired in parallel or series with hard

contacts.

Loads with inductive characteristics may require additional suppression

devices. The impedance characteristic of the load is the most important

factor in selecting a suppression device; thus no single suppression device

can be recommended for every possible load. See Table 1 for acceptable

suppression devices for typical loads.

Table 1

AllenBradley

Suppressors

AllenBradley Equipment Suppressor Catalog Number

Motor Starter Bulletin 509 599K041

Motor Starter Bulletin 709 1401N101

Relay Bulletin 700 Type N or P 700N5/700N9

Miscellaneous 700N242

1For

starters with 120V AC coils

2Bulletin

700N24 is a universal surge suppressor

. Y

ou can use it on electromagnetic devices with the limitation of

35 sealed V

A, 150V

The isolated output module is powered by the power supply connected to

the I/O chassis backplane. The module requires a maximum current of

420mA 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.

Power Supply Requirements

AC (120V) Output Module

(Cat. No. 1771-ODD)

Installation Instructions

Figure 1

Connection

Diagram for the 1771ODD Isolated Output Module

Output 0

Output 1

Output 2

Output 3

Output 4

Output 5

Output 6

Output 7

Output 10

Output 11

Output 12

Output 13

Output 14

Output 15

Output 16

Output 17

ac High

ac Low

L1  0

L1  1

L1  2

L1  3

L1  4

L1  5

L1  6

L1  7

L1  10

L1  11

L1  12

L1  13

L1  14

L1  15

L1  16

L1  17

Not Used

Not used

120V ac

Supply

10944I

Output

Device

You can use an output of the 1771-ODD module to drive an input of a

120V ac input module (1771-IA, -IA2, -IAD,-ID) to indicate status of

turning on a motor starter, for example (Figure 2). Inputs configured with

the output module are not isolated from each other.

ATTENTION: Do not connect the 1771-ODD output channels

in series. Doing so can result in distortion of the output

waveform causing the output devices to chatter.

AC (120V) Output Module

(Cat. No. 1771-ODD)

Installation Instructions

Figure 2

Driving

an Input with an Output

Output 0

Output 1

Output 2

Output 3

Output 4

Output 5

Output 6

Output 7

Output 10

Output 11

Output 12

Output 13

Output 14

Output 15

Output 16

Output 17

ac High

ac Low

L1  0

L1  1

L1  2

L1  3

L1  4

L1  5

L1  6

L1  7

L1  10

L1  11

L1  12

L1  13

L1  14

L1  15

L1  16

L1  17

Not Used

Not used

120V ac

Supply

L1 L2

Input 00

Input 01

Input 02

Input 03

Input 04

Input 05

Input 06

Input 07

Input 10

Input 11

Input 12

Input 13

Input 14

Input 15

Input 16

Input 17

AC (120V) Isolated Output Module

Cat. No. 1771ODD

AC/DC (120V) Input Module

Cat. No. 1771IAD

10945I

Each module output is individually fused. You can easily access the

module fuses by removing the front component-side cover. Follow the

procedure below.

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 could cause

injury or equipment damage due to possible unexpected

operation.

Failure to remove power from the backplane or wiring arm

could cause module damage, degradation of performance, or

injury.

Replacing a Fuse

Specifications

AC (120V) Output Module

(Cat. No. 1771-ODD)

Installation Instructions

Outputs per Module 16

Module Location 1771A1B thru A4B or later I/O Chassis and 1771AM1, AM2

Voltage Rating 85 to 138V ac, 4763Hz

Current Rating (per channel) 10mA - 2A continuous (max)

20A surge for 100ms; repeatable once every 2 seconds

8A per module maximum

Power Rating 3 Watts per output (max) @ 2A

Onstate Voltage Drop (each output) 6.5V rms (max.) @ load current <65mA

1.5V rms (max.) @ load current >65mA

Signal Delay Times Off to On

On to Off

8.8msec @ 60Hz max.: 10.6msec @ 50Hz max

(zero cross switching)

Power Dissipation 14.2 Watts (max); 0.1 Watts (min)

Thermal Dissipation 48.5 BTU/hr (max); 0.4 BTU/hr (min)

Backplane Current 420mA maximum at 5.25V

Isolation Voltage 1500V channeltochannel

1500V to backplane

Maximum Cable Length 1000 ft (304.8 m)

Conductors Wire Size

Category

14 gauge stranded maximum

3/64 inch insulation maximum

Environmental Conditions

Operational Temperature

Storage Temperature

Relative Humidity

0oto 60oC (32oto 140oF)

40oto 85oC (40oto 185oF)

5 to 95% (without condensation)

Keying Between 4 and 6

Between 30 and 32

Field Wiring Arm Catalog Number 1771WN

Wiring Arm Screw Torque 7-9 poundinches

Fuses 3A 2AG SloBlo fuses (1 per output)

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

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, 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

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Publication

17712.146  August 1991

Supersedes

publication 17712.146  March 1990

P/N

9551

1060

1991 AllenBradley Co. Inc. Printed in USA

Indice

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