Rockwell Automation 1771-P4R, 1771-P6R User Manual

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Installation Instructions

AllenĆBradley Redundant Power Supplies

Cat. No. 1771ĆP4R and 1771ĆP6R

To the Installer

Important User Information

This document provides you with the following information:

For this information See page

Important user information 1

What this package contains 4

Tasks on installing your power supply module 4

How to interpret indicators 13

Flow charts for troubleshooting your power supply module 15

Power supply specifications 20

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.

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.

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Allen-Bradley Redundant Power Supplies2

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.

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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.

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What This Package Contains

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.

When you receive your 1771-P4R or -P6R power supply, you should see the following in the box:

• one 1771-P4R or 1771-P6R power-supply module

• one 3-position terminal block (attached to module)

• one 5-position terminal block (attached to module)

• one redundant cable

Installing the PowerĆsupply Module

To install your power supply module you perform these tasks:

To perform this task See page

set the jumpers

set the I.D. selection and configuration switches 6

place the power supplies 7

connect the redundancy cables 8

wire the alarm relay 8

connect input power 10

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Set the Jumpers

Each power supply module has two jumpers located at the back of the power supply near the edge connectors. The jumper selection provides the proper voltage regulation for the different power supply configurations. The power supply can be configured to support local or remote sensing by setting the jumpers.

1. Locate the power supply jumpers on the back edge of the module near the gold-plated edge connectors:

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2. Position the power supply module so that the jumpers and pins are facing upward.

3. Use needle nose pliers to position the jumpers as shown in this table.

For this configuration Set jumpers to

All power supplies in a powerĆsupply chassis (1771ĆPSC) connected to an I/O chassis.

All other configurations. (These power supplies are shipped with jumpers set to the left.)

right position

left position

To avoid system malfunctions, set the jumpers

IMPORTAN

of power supplies in 1771 I/O chassis to the left position.

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Switches Are set

1, 2, 3, 4

5, 6 based on the configuration zone

for the power supply identification number

Set the I.D. Selection and Configuration Switches

Each power supply in a redundant system must be assigned a different identification number. To do this, you must set the I.D. selection switches located on the left side of the module (shown below). A cutout in the metal cover of the module provides access to these switches.

I.D. Selection Switch

To set the switches:

1. Close the I.D selection switch (1, 2, 3, or 4) that represents the number you selected for that power supply.

2. Determine the configuration zone being used so you can set switches 5 and 6.

To determine the configuration zone, you must know the maximum chassis current draw and the ambient air temperature of the chassis.

Maximum Current Draw (A) Ambient Temperature Configuration Zone

0Ć8

8Ć14

14Ć16

16Ć20

20Ć24

55°C 60°C 55°C 60°C 55°C B 60°C C 55°C 60°C 55°C C 60°C

not permitted

3. Use the following table to position switches 5 and 6 based on the configuration zone you determined.

If Configuration Zone Is Set Switches

A B 5 CLOSED and 6 OPEN C 5 OPEN and 6 CLOSED

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5 and 6 OPEN

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Place the Power Supplies

ATTENTION

You can place these power supply modules into any I/O module slot in any current chassis (1771-A1B, -A2B, -A3B, -A3B1,

-A4B, -PSC). The primary requirement for placing redundant power supplies is the need to allocate 2 to 4 adjacent slots in your 1771 I/O chassis for the modules.

IMPORTAN

WARNING

Turn off the power supply module before removing it from or inserting it into a chassis. Failure to observe this warning could alter processor memory, damage module circuitry, and cause unintended operation which could possibly cause injury to personnel.

You cannot use the 1771-P4R, -P6R power supplies with series A 1771 I/O chassis.

When you insert or remove the module while backplane power is on, or you connect or disconnect the wiring 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.

The power supply 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, and proper installation and grounding requirements. Limit the adjacent slot power dissipation to 10W maximum.

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Cable pt. no. A-B 941201-02 (supplied with power supply)

Connect the Redundancy Cables

The power supply redundancy cables (A–B pt. no. 941201–02) allow the power supplies to communicate load-sharing data. The two connectors on each supply are in parallel to permit three or four supplies to be daisy-chained together in a redundant system.

To connect the cables:

1. Connect the redundancy cable between the connectors labeled P/S REDUNDANT on the power supply as shown below.

Connecting the Redundancy Cables for a 2, 3, or 4 Supply System

2 powerĆsupply system 3 powerĆsupply system 4 powerĆsupply system

2. Loop the cable over the top of the I/O chassis to avoid picking up signals induced from I/O wiring.

WARNING

When you insert or remove the module while backplane power is on, or you connect or disconnect the alarm relay, ac power, or redundancy cable 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.

Wire the Alarm Relay

A 3-position terminal block labeled RELAY on the front panel of the module provides you with a means of communicating the status of the power supply to some alarm device. The contacts on the relay are rated at 1/6 HP, 250V ac, 1 Amp, 30V dc maximum.

The relay energizes within 0.5 seconds after sufficient input power is applied and no error conditions have been encountered. The error conditions include 5V output overvoltage, undervoltage, or overcurrent and internal reference error. The relay de-energizes within 10 seconds following detection of an error condition or loss of power. Contact bounce may occur for 100 ms.

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The terminal block has three lines:

• NC (Normally Closed)

• COM (Common)

• NO (Normally Open)

Using the normally closed side of the block will keep the relay contacts open until unit failure (when it will close). Using the normally open side of the relay will keep the relay contacts closed until unit failure (when it will open).

To wire the relay, place the incoming line in the NC or NO position and out the COM position to the load. Any spare point on an input module can be connected and used for signaling by the relay.

To connect the wiring to the 3–terminal relay connector, proceed as follows:

A. Strip 0.35 inches (9cm) of insulation off the wire.

B. Spring the clip open to insert the wire, using a wedge-tipped

tool, such as a small screwdriver.

• If you leave the terminal block plugged into the supply,

insert the tool parallel to the wire (push straight in).

Insert wire here

This side plugs into the connector on module

Place tool here

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• If you remove the terminal block and lay it on a flat

surface, insert the tool perpendicular to the wire (push straight down).

Insert wire here

This side plugs into the connector on module.

Place tool here

C. After making the wiring connections, re-insert the terminal

block into the front plate on the processor.

19966B

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Alarm Relay and AC Power Connections

Connect Input Power

The following figure shows the overall configuration of the ac power connections.

The two undesignated terminals do not connect to any electrical circuit on the module. Each of the three functional terminals accepts a single 14-AWG wire max.

To correctly connect the wire to the terminal you connect the wires to the terminal in this order:

• connect the high side of the power source to the L1 terminal of

the power supply

• connect the low side of the power source to the L2 or N (neutral)

terminal of the power supply

• connect the GND (ground) terminal of the power supply to the

central ground bus in the enclosure

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ATTENTION

You can connect these wires while the terminal block is plugged into the supply, or you can remove the terminal block to lay it on a flat surface to connect these wires. To remove the terminal block, pull it straight out out from the receptacle on the module.

WARNING

Pay close attention to the ac GND and L1 connections when wiring the terminal block. An error here could cause the ac power to be applied to the chassis.

Check that the input voltage rating on the power supply front panel agrees with the available power source. Application of the incorrect line voltage can cause severe power supply damage.

To connect wiring to the 5–terminal ac power block, proceed as follows:

1. Connect the power cord to the ac connector (120V or 220V) of the power supply module.

A. Strip 0.35 inches (9cm) of insulation off the wire.

B. Spring the clip open to insert the wire, using a wedge-tipped

tool, such as a small screwdriver.

• If you leave the terminal block plugged into the supply,

insert the tool parallel to the wire (push straight in).

Insert wire here

This side plugs into the connector on module

Place tool here

19966

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• If you remove the terminal block and lay it on a flat

surface, insert the tool perpendicular to the wire (push straight down ).

Insert wire here

This side plugs into the connector on module.

Place tool here

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C. After making the wiring connections, re-insert the terminal

block into the front plate on each processor.

Make sure the plug is completely inserted and the locking prongs are engaged.

Once you have completed the tasks up to this point, you can turn the power switches ON. Turn all the power switches on at the same time. If everything is set up correctly, all P/S ACTIVE (green) indicators will be on and all NON REDUNDANT SYSTEM (yellow) indicators will be off.

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Interpreting the Power Supply Indicators

Your power supply has two indicators located in the upper half of the module front panel.

The top indicator is yellow and is labeled NON REDUNDANT SYSTEM. This indicator tells you that the number of supplies in operation is below the number required for redundant operation. The yellow indicators in a redundant system operate together; they are either all on or all off.

The lower indicator is green and is labeled P/S ACTIVE. The following table shows how to interpret this indicator.

If P/S ACTIVE indicator is

OFF The supply has detected one of the following conditions:

Then

This power supply is operating normally and a sufficient number of power supplies is operational for the system configuration.

• dc overvoltage (the supply shuts down)

• dc undervoltage (the supply shuts down)

• dc overcurrent (the supply shuts down)

• power switch turned off (the supply is turned off)

• ac undervoltage

• insufficient number of operational power supplies for the system

configuration

When the P/S ACTIVE indicator is off because of an ac undervoltage or because an insufficient number of supplies is operational, the power supply may continue to deliver output power.

Troubleshoot Your Power Supplies

When you troubleshoot your power supplies, you may be required to remove and replace the power supply while power is still applied to the chassis.

For information on See page

Removing the power supply

Inserting the power supply 14

Troubleshooting a single power supply 15

Troubleshooting multiple power supplies 16

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Removing the Power Supply

WARNING

1. Flip the POWER switch on the front panel to the Off position,

only on the unit to be removed.

2. Remove the ac input terminal block, the alarm relay terminal block, and the redundant cables only from the unit to be removed.

3. Slide the unit out of the chassis and note the following settings:

• I.D selection switch setting (1 through 4)

• configuration switch setting (5 and 6)

• jumper setting (local or remote sensing)

• input voltage rating on the front panel near the ac input

connector

You will set the replacement unit to the same settings.

Inserting the Power Supply

1. Configure the supply to the same settings as the unit removed.

2. Flip the POWER switch on the front panel to the Off position.

3. Insert the module completely into the slot in the chassis.

4. Connect redundant cables, alarm relay terminal block, and ac

input terminal block.

5. Flip the POWER switch to the On position.

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Troubleshooting a Single Power Supply

If you have a single power supply installed in an I/O chassis and its P/S ACTIVE indicator is off, follow the troubleshooting flowchart below.

Turn off the power supply and wait 5 seconds. Check I.D. Selection and Configuration switch settings. Then turn on the power supply.

P/S Active

ON?

Turn off the power supply and wait 5 seconds. Pull the power supply half way out of the chassis and turn it on to test it without a load.

P/S Active

Off?

Turn off the power supply and wait 5 seconds. Firmly seat the power supply into the backplane then turn on the power supply again.

P/S Active

ON?

yes

Done

yes

If ac voltage is OK, replace the power supply.

yes

Done

Try replacing the power supply with a known good power supply.

P/S Active

ON?

Try replacing the I/O modules (one of them could be overloading the power supply).

yes

Done

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Troubleshooting Multiple Power Supplies

If you have multiple power supplies, refer to the flowcharts on the next three pages to help you troubleshoot when the following problems occur.

Problem 1

One or more (but not all) of the supplies in the redundant system has its P/S ACTIVE indicator off. (Depending on the system configuration, NON REDUNDANT SYSTEM indicators may or may not be on.)

Turn off the power supply and wait 5 seconds. Then turn on the power supply.

yes

Done

yes

If ac voltage is OK, replace the power supply.

yes

Done

P/S Active

ON?

Turn off the power supply and wait 5 seconds. Pull the power supply half way out of the chassis, open switches 5 and 6, and remove redundant cables. Turn the power supply on to test it without a load.

P/S Active

Off?

Turn off the power supply and wait 5 seconds. Reset switches 5 and 6 to original positions and reinsert the redundant cables. Firmly seat the power supply into the backplane, then turn on the power supply again.

P/S Active

ON?

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Try replacing the power supply with a known good power supply.

yes

Done

P/S Active

ON?

Turn off the power supply and check the redundant cables for continuity and shorts. These shielded 6Ćconductor cables are 1:1.

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Problem 2

All the supplies in the redundant system have their P/S ACTIVE indicators off. The NON REDUNDANT SYSTEM LED may or may not be on.

Turn off the power supply and wait 5 seconds. Then turn on the power supplies simultaneously.

yes

Done

If ac voltage is OK, replace the

yes

power supply, but do not turn the ac power switch on. Continue to test other supplies.

yes

Done

P/S Active

ON?

Turn off the power supplies and wait 5 seconds. Test each power supply individually. Pull the first power supply half way out of the chassis. Open switches 5 and 6 and remove the redundant cables. Turn on the power supply to test it without a load. Repeat for the other power supplies.

P/S Active

Off?

P/S Active

ON?

Using a known good supply, swap out each power supply with the known good power supply. Be sure to correctly set the I.D. switches.

P/S Active

ON?

Turn off the power supply and check the redundant cables for continuity and shorts. These shielded 6Ćconductor cables are 1:1.

P/S Active

ON?

Try replacing the I/O modules (one of them could be overloading the supplies).

yes

Done

yes

Done

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Problem 3

All P/S ACTIVE indicators show that the power supplies are OK, but one or more NON REDUNDANT SYSTEM indicators are on, indicating the desired redundancy is not available.

Check the redundant cables for continuity and shorts. These shielded 6Ćconductor cables are 1:1.

yes

Done

If ac voltage is OK, replace the

yes

power supply, but do not turn the ac power switch on. Continue to test other supplies.

P/S Active

ON?

Check switches 5 and 6 on all supplies to make sure settings on each are the same.

P/S Active

Off?

Try replacing the power supply with a known good power supply.

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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

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.

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

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 2.

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

avant de changer les piles.

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Specifications

1771-P4R 1771-P6R

Input Voltage 120V ac, 50-60Hz, 1A 220V ac, 50-60Hz, 0.5A

Input Voltage Range 97-132V ac 194-240V ac

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

Output Voltage 5V dc, 8A (See Derating Curve)

Maximum System Output Current at

C using N+1 Redundancy

Power Dissipation 16 Watts (max.)

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 1000V for 60s.

Redundancy Cable A-B pt. no. 941201-02

Conductors Wire Size

Rockwell Automation 1771-P4R, 1771-P6R User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual