Rockwell Automation 1771-OBDS User Manual

Download

Installation Instructions

DC (10Ć40V) Current Limiting Output Module

Cat. No. 1771ĆOBDS

To The Installer

Important User Information

Use this document as a guide when installing the catalog number 1771-OBDS output module.

For information on: See page

Important User Information 1

Preinstallation Considerations 4

Calculate Power Requirements 4 Set the Fault Mode Selection Jumper 4

Key the Backplane Connector 5

Install the Module and Field Wiring Arm 6

Connect Wiring to the Output Module 7

Short Circuit Protection 10

Replacing the Fuse 11

For this reference information See page

Intepreting the Status Indicators 10 Hazardous Location Approval 12 Specifications 13

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.

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module2

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

IMPORTAN

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.

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module 3

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.

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module4

PreĆinstallation Considerations

ATTENTION

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.

This module must be used with a 1771-A1B thru -A4B or later I/O 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.

Calculate Power Requirements

Set the Fault Mode Selection Jumper

Your module receives its power through the 1771 I/O chassis backplane from the chassis power supply. The module requires 300mA 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 backplane power supply.

You may select one of two input-failure configurations (last state or reset) by positioning a configuration plug on the bottom edge of the printed circuit board. This configuration plug is independent of the last state switch on the I/O chassis backplane.

To set the fault mode selection, proceed as follows:

1. Locate the fault mode selection plug at the bottom edge of the module circuit board.

LS RESET

Bottom edge of circuit board

2. Using your finger, slide the plug off the two posts.

Fault Mode Selection Plug

(shown in last state position)

10418ĆI

Publication 1771ĆIN033B-EN-P - July 2002

3. Carefully position the plug on two of the three posts that correspond to your requirement.

DC (10-40V) Current Limiting Output Module 5

Key the Backplane

ATTENTION

Connector

Place your module in any slot in the chassis except the leftmost slot, which is reserved for processors or adapters.

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.

A module inserted into a wrong slot could be damaged by improper voltages connected through the wiring arm. Use keying bands to prevent damage to the module.

Position the keying bands in the backplane connectors to correspond to the key slots on the module.

I/O chassis

Place the keying bands:

- between 10 and 12

- between 22 and 24

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

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module6

Install the Module and Field Wiring Arm

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

locking tab

WARNING

ATTENTION

When you insert or remove the module while backplane power is on, or you connect or disconnect the wiring arm with field power applied, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure power is removed or the area is nonhazardous before proceeding.

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

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 (1771ĆWH) 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.

The 1771–OBDS 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.

module

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

horizontal bar

remove

install

card guides

module

19809

wiring arm

1771ĆWH

17643

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module 7

Connect Wiring to the Output Module

ATTENTION

Make wiring connections to the 21 terminal field wiring arm (cat. no. 1771-WH) shipped with the module.

Attach the wiring arm to the pivot bar on 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.

WARNING

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

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.

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module8

+dc +dc +dc +dc

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

Ćdc

dc Output Device

User

Supply

Actual wiring runs in this direction.

10419ĆI

You must supply dc at terminals A through D on the wiring arm. You need four dc connections to accommodate the total required surge rating on the module without overstressing any single connection on the field wiring arm. Jumper all dc connections together to prevent module damage. Connect terminal E to dc common.

ATTENTION

Observe proper polarity, as indicated in the connection diagram with dc power connections. Reverse polarity, or application of ac voltage, could damage the module.

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module 9

You can use a DC (10-40V) Output Module (cat.

IMPORTANT

no. 1771-OBDS) to directly drive terminals on the following modules:

• DC (10-30V) Input module (cat. no.

1771-IBD)

• DC (20-60V) Input module (cat. no.

1771-ICD)

• DC (12-24V) Input module (cat. no. 1771-IB)

See below for direct connection to a 1771-ICD input module.

Use the same dc supply to power both modules to ensure that ground is at the same potential.

Driving an Input Module with an Output Module

DC (10Ć40V) Current Limiting Output Module

(Cat. No. 1771ĆOBDS) (Cat. No. 1771ĆICD)

10Ć40V dc

+dc +dc

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

Ćdc

DC (20Ć60V) Input Module

Not used Not used

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

dc Common

Actual wiring runs in this direction.

10420ĆI

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module10

Short Circuit Protection

Interpreting the Status Indicators

Module Active

10421ĆI

Indicator (green)

00 to 17 Status Indicators (red)

Fuse Blown Indicator (red)

ACTIVE 00

01 02 03 04 05 06 07

FUSE

10 11

12 13

14 15 16 17

Each output of the module is capable of withstanding a short circuit condition. When an output is shorted, it will become ”latched off,” but its corresponding status indicator will remain lighted. Once the short circuit is removed from that output, the output image table bit for that output must be reset by ”toggling” the bit off and then back on. This resumes normal operation. This toggling procedure can be done several ways, depending on your system setup:

• modifying the data table

• switching the programmable controller from RUN to PROGRAM

mode, and back again

• cycling power to the system.

The front panel of your module contains one green module active indicator, 16 red status indicators and one red fuse blown indicator. The green module active indicator lights when the module is powered, the processor keyswitch is on ”run”, and the opto-isolators and data paths are functioning properly. It turns off if a fault occurs in the data paths or the opto-isolators. The module then resets its outputs or sets them to last state.

The module active indicator must be on to properly interpret the red status indicators. The red status indicators are provided for indication of individual outputs. They indicate the state to which the transistor is commanded by the processor and are powered by circuitry within the module. The indicators will turn on and off as commanded by the processor. They do not indicate the presence or absence of dc power at an output terminal. However, all output status indicators will turn off if the fuse is blown.

The fuse blown indicator turns on when the fuse is blown. When the fuse blown indicator is lit, check the fuse. After checking the fuse, make sure the field wiring arm is firmly in place. Do this before checking the status of the other indicators.

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module 11

Replacing the Fuse

The individual output transistors are thermally protected against overcurrent or overtemperature conditions. However, a module overload may cause the single, replaceable onboard fuse to blow when the module output exceeds 12A. The onboard fuse is not intended to protect individual output transistors. You can replace the onboard 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.

2. Remove the module from the chassis and replace the blown fuse with a 12A, 250V rectifier fuse (1/4 x 1-1/4 inch), Bussman part number GBB12. The fuse is accessible through the side of the module.

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

4. Turn system power ON.

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module12

The following information applies when operating this equipment in hazardous locations:

Products marked CL I, DIV 2, GP A, B, C, D" are suitable for use in Class I Division 2 Groups A, B, C, and D Hazardous Locations and nonhazardous locations only. Each product is supplied with markings on the rating nameplate indicating the hazardous location temperature code. When combining products within a system, the most adverse temperature code (lowest T" number) may be used to help determine the overall temperature code of the system. Combinations of equipment in your system are subject to investigation by the local Authority Having Jurisdiction at the time of installation.

WARNING

Informations sur l'utilisation de cet équipement en environnements dangereux:

Les produits marqués CL I, DIV 2, GP A, B, C, D ne conviennent que une utilisation en environnements de Classe I Division 2 Groupes A, B, C, D dangereux et non dangereux. Chaque produit est livré avec des marquages sur sa plaque d'identification qui indiquent le code de température pour les environnements dangereux. Lorsque plusieurs produits sont combinés dans un systéme, le code de température le plus défavorable (code de température le plus faible) peut eatre utilisé pour déterminer le code de température global du systéme. Les combinaisons d'equipements dans le systéme sont sujettes à inspection par les autorités locales qualifiées au moment de l'installation.

AVERTISSEMENT

EXPLOSION HAZARD -

• Do not disconnect equipment unless power has been removed or

the area is known to be nonhazardous.

• Do not disconnect connections to this equipment unless power

has been removed or the area is known to be nonhazardous. Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means provided with this product.

• Substitution of components may impair suitability for Class I,

Division 2.

• If this product contains batteries, they must only be changed in an

area known to be nonhazardous.

RISQUE D'EXPLOSION -

• Couper le courant ou s'assurer que l'environnement est classé

non dangereux avant de débrancher l'équipement.

• Couper le courant ou s'assurer que l'environnement est classé

non dangereux avant de débrancher les connecteurs. Fixer tous les connecteurs externes reliés à cet équipement à l'aide de vis, loquets coulissants, connecteurs filetés ou autres moyens fournis avec ce produit.

• La substitution de composants peut rendre cet équipement

inadapté à une utilisation en environnement de Classe 1, Division

• S'assurer que l'environnement est classé non dangereux avant

de changer les piles.

PLC-2/02, PLC-2/05, PLC-2/16, and PLC-2/17 are trademarks of Allen-Bradley Company, Inc.

Publication 1771ĆIN033B-EN-P - July 2002

DC (10-40V) Current Limiting Output Module 13

Specifications

Outputs per Module 16

Module Location 1771ĆA1B, thru ĆA4B or later I/O chassis

Output Voltage Range 10 to 40V dc

Output Current Rating 1A per output Ć not to exceed 8A per module, Pilot duty.

See derating curve below.

On State Voltage Drop (max.) 1.5V at rated current

Off State Leakage Current (max.) 0.5mA per output

Signal Delay Off to On

On to Off

1.0ms

Power Dissipation 14 Watts (max.), 2 Watts (min.)

Power Dissipation - adjacent slot 10 Watts (max.)

Thermal Dissipation 47.8 BTU/hr (max.), 6.9 BTU/hr (min.)

Backplane Current 300mA @ 5V dc +5%

Isolation Voltage Tested to withstand 500V for 60s.

Conductors Wire Size

Rockwell Automation 1771-OBDS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual