Allen-Bradley 1771-OBN Manuale utente

DC (1030V) Output Module

Cat. No. 1771OBN

Installation Instructions

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

The 1771-OBN dc output module is a source output and requires a sink

input. A sink input provides a path to ground and a source output provides

a positive voltage path.

Use this module in all 1771 I/O chassis except 1771-A1, -A2 and 1771-A4

chassis. Refer to the table below for processor compatibility.

Table A

Processor

Compatibility Chart

System Type Use with Processors:

Local MiniPLC2/02(cat. no. 1772LZ, LZP)

MiniPLC2/16 (cat. no. 1772LX, LXP)

MiniPLC2/17 (cat. no. 1772LW, LWP)

PLC5/15, Series B and later (cat. no. 1785LT)

Remote (with a 1771ASB

remote I/O adapter)

PLC2/20(cat. no. 1772LP2)

PLC2/30 (cat. no. 1772LP3)

PLC3(cat. no. 1775L1, L2, L3, L4)

PLC3/10 (cat. no. 1775LP4, LP8)

PLC5/15, Series B and later (cat. no. 1785LT)

Do not place this module in the same I/O chassis as the 1771-IX

thermocouple module. You can use this module in the same chassis as the

1771-IXE thermocouple module.

To The Installer

Preinstallation

Considerations

DC (10 - 30V) Output Module

(Cat. No. 1771-OBN)

Installation Instructions

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

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

modules. The maximum current drawn from this supply is 330mA.

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

I/O chassis, install your module and make your wiring connections.

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 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.

The 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.

Power Supply Requirements

Installing Your Module

DC (10 - 30V) Output Module

(Cat. No. 1771-OBN)

Installation Instructions

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:

14 and 16

20 and 22

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.

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.

Connecting Wiring to the Module

You make connections to the module through the field wiring arm cat. no.

1771-WN. 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 in Figure 1.

(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.

DC (10 - 30V) Output Module

(Cat. No. 1771-OBN)

Installation Instructions

I/O Module Groups

Each module condenses 2 full module groups (32 outputs) into each I/O

chassis slot. For example:

Module group 1 = outputs 00 through 17

Module group 2 = outputs 00 through 17 (module group 2

represents the second set of outputs).

In Figure 1, terminals 1 through 20 represent module group 1. Terminals

21 through 40 represent module group 2. Terminals 10, 20, 30 and 40 are

DC common and terminals 1, 11, 21 and 31 are DC power.

Figure 1

Connection

Diagram for the 1771OBN DC Output Module

Output 0

Output 2

Output 4

Output 6

Common 0

Output 10

Output 12

Output 14

Output 16

Common 1

Output 0

Output 2

Output 4

Output 6

Common 2

Output 10

Output 12

Output 14

Output 16

Common 3

+ dc

Output 1

Output 3

Output 5

Output 7

+ dc

Output 11

Output 13

Output 15

Output 17

+ dc

Output 1

Output 3

Output 5

Output 7

+ dc

Output 11

Output 13

Output 15

Output 17

Supply

dc Output

Device

(See applicable codes and laws.)

Note: Terminals on the left are

even numbered (2 thru 40) , and

terminals on the right are odd

numbered (1 thru 39). 2

(Actual wiring runs in this direction.) 11850I

DC (10 - 30V) Output Module

(Cat. No. 1771-OBN)

Installation Instructions

ATTENTION: Miswiring or shorting the output terminals will

cause permanent damage to this module.

ATTENTION: Observe proper polarity with dc power

connections. Reverse polarity, or application of ac voltage could

damage the module.

Table B

Module

Output T

erminal Assignments

Terminal

Number Output Assignment I/O program address Terminal

Number Output Assignment I/O program address

01 110 to 30V dc  21 110 to 30V dc 

02 Output 00 0RG00 22 Output 00 0RG00

03 Output 01 0RG01 23 Output 01 0RG01

04 Output 02 0RG02 24 Output 02 0RG02

05 Output 03 0RG03 25 Output 03 0RG03

06 Output 04 0RG04 26 Output 04 0RG04

07 Output 05 0RG05 27 Output 05 0RG05

08 Output 06 0RG06 28 Output 06 0RG06

09 Output 07 0RG07 29 Output 07 0RG07

10 Common 0  30 Common 2 

11 110 to 30V dc  31 110 to 30V dc 

12 Output 10 0RG10 32 Output 10 0RG10

13 Output 11 0RG11 33 Output 11 0RG11

14 Output 12 0RG12 34 Output 12 0RG12

15 Output 13 0RG13 35 Output 13 0RG13

16 Output 14 0RG14 36 Output 14 0RG14

17 Output 15 0RG15 37 Output 15 0RG15

18 Output 16 0RG16 38 Output 16 0RG16

19 Output 17 0RG17 39 Output 17 0RG17

20 Common 1  40 Common 3 

Where: R = rack number (1, 2, 3, etc.)

G = I/O group (0  7)

1You

can connect a dif

ferent power supply to each 10 to 30V dc terminal. They are not connected internally

. Connect each common (0, 1, 2, 3) to the corresponding supply

Commons are not internally connected.

DC (10 - 30V) Output Module

(Cat. No. 1771-OBN)

Installation Instructions

The module has 32 status indicators (Figure 2) on the module front plate.

These represent the control status of the outputs. Each indicator is lit when

its corresponding output is energized. An additional indicator is provided

to indicate a blown fuse condition.

Figure 2

Status

Indicators

Status Indicators (red)

FUSE

Fuse Blown Indicator

11851I

Interpreting the Status

Indicators

DC (10 - 30V) Output Module

(Cat. No. 1771-OBN)

Installation Instructions

To replace a blown fuse, proceed as follows:

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.

1. Turn off power to the chassis.

2. Remove the module from the I/O chassis.

3. Remove the blown fuse from the fuse holder (accessible through the

side cover), and replace with a 4A, 250V normal blow fuse.

4. Reinsert the module into chassis I/O chassis.

5. Turn on power to the chassis.

Replacing the Fuses

Specifications

DC (10 - 30V) Output Module

(Cat. No. 1771-OBN)

Installation Instructions

Outputs per module 32 (4 groups of 8)

Module Location 1771A1B thru A4B or later I/O Chassis

Voltage Rating 10 to 30V dc

Maximum Output Current 0.5A per output (not to exceed 8A per module)

2A per output group

Maximum Surge Current 2A per output for 10msecond; repeatable every 2 seconds.

5A per output group for 10msec.;repeatable every 2 seconds.

20A per module for 10msec.; repeatable every 2 seconds.

Maximum Onstate Voltage Drop 1.5V dc at 0.5A

Maximum Offstate Leakage Current 1.0mA @ 55oC

Maximum Power Rating 0.75W per output

Output Signal Delay On to Off

Off to On

2.0ms

0.1ms

Power Dissipation 13.7W (max); 1.7W (min)

Thermal Dissipation 46.7 BTU/hr (max); 5.7 BTU/hr (min)

Backplane Current 330mA @ 5V dc maximum

Isolation Voltage 1500V ac rms

Conductors Wire Size

Category

14 gauge stranded (max)

3/64 inch insulation (max)

Category 11

Environmental Conditions

Operational Temperature

Storage Temperature

Relative Humidity

0oto 60oC (32oto 140oF)

40oto 85oC (40oto 185oF)

5 to 95% (without condensation)

Keying Between 14 and 16

Between 20 and 22

Field Wiring Arm Cat. No. 1771WN

Field Wiring Arm Screw Torque 79 inchpounds

Fuses Four 4.0A, 250V normal blow fuses (1 per group)

1Refer

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

PLC is a registered trademark of Allen-Bradley Company, Inc.

With major offices worldwide.

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enezuela

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World 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2.168  December 1994

Supersedes

publication 17712.168  November 1991 and 17712.168-RN1 - September 1993

P/N

9551

1552

1994 AllenBradley Company

, Inc. Printed in USA

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