Allen-Bradley 1771-P4R Installations- und Benutzerhandbuch

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

AllenBradley

Redundant Power Supplies

(Cat. No. 1771-P4R and 1771-P6R)

Installation Data

This document provides you with the following information:

what this package contains

tasks on installing your power supply module

how to interpret indicators

flow charts for troubleshooting your power supply module

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

To install your power supply module you need to know how to perform the

following tasks:

set the jumpers

set the I.D. selection and configuration switches

place the power supplies

connect the redundancy cables

wire the alarm relay

connect input power

the Installer

What This Power Supply

Package Contains

Installing the Power Supply

Module

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

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.

To configure the supply:

1. Position the power supply module so that the jumpers and pins are

facing upward (as shown in figure 1).

Figure

Power Supply Jumpers

2. Set the jumpers as shown in table A. Use needle nose pliers to

position the jumpers.

Table

Jumper Settings

For this configuration Set jumpers to:

A power supplies in a powersupply

chassis (1771PSC) connected to an I/O

chassis.

right position

All other configurations. (These power

supplies are shipped with jumpers set to

the left.)

left position

Important: If the power supplies are located in a 1771 I/O chassis, the

jumpers must be set to the left position. System malfunction may

otherwise occur.

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

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 (figure 2). A cutout in the metal

cover of the module provides access to these switches.

Figure

l.D. Selection Switch

Switches 1 through 4 are for the power supply identification number.

Switches 5 and 6 are set based on the configuration zone.

To set the switches, follow this procedure:

1. Close the I.D selection switch (1 through 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. Refer to table B.

Table

Configuration Zones A, B, and C

Maximum Current Draw in Amps Ambient Temperatures

60°C 55°C

08 A A

814 B B

1416 C

1620 C

2024 Not permitted

3. Position switches 5 and 6 based on the configuration zone you

determined. Table Cshows switch positions for configuration zones.

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

Table

Switch Positions

If Configuration Zone Is Set Switches:

A 5 and 6 OPEN

B 5 CLOSED and 6 OPEN

C 5 OPEN and 6 CLOSED

Place the Power Supplies

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 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 1771I/O chassis for the modules.

Important: Series A I/O chassis CANNOT be used with 1771-P4R,

-P6R modules.

Connect the Redundancy Cables

The power supply redundancy cables 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 in figure 3.

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

signals induced from I/O wiring.

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

Figure

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

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

Amp, 250V ac 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.

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

The terminal block has three lines (figure 4):

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.

Figure

Alarm Relay and AC Power Connections

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

Connect Input Power

Figure 4shows the overall configuration of the ac power connections. To

correctly connect the wire to the terminal:

1. Connect the high side of the power source to the L1 terminal of the

power supply.

2. Connect the low side of the power source to the L2 or N (neutral)

terminal of the power supply.

3. Connect the GND (ground) terminal of the power supply to the

central ground bus in the enclosure.

WARNING: Pay close attention to the ac GND and L1

connections when wiring the terminal block. An error here

could cause the ac to be applied to the chassis.

WARNING: 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.

Figure 5shows details of how to connect a wire to a terminal on the

terminal block. 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.

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.

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

To connect a wire to a terminal:

1. Strip 0.35 inches of insulation off the wire.

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

tool such as a small screw driver If you leave the terminal block

plugged into the supply, insert the tool parallel to the wire (push

straight in). If you remove the terminal block and lay it on a flat

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

3. After making the wiring connections, re-insert the terminal block into

the front plate if you removed it. Be sure that the plug is completely

inserted and that the locking prongs are engaged.

Figure

Connecting a W

ire to a T

erminal

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.

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

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. Table D shows

how to interpret the P/S ACTIVE indicator.

Table

Interpreting the P/S ACTIVE Indicator

If the Indicator is: Then:

On This power supply is operating normally and a sufficient number of

power supplies is operational for the system configuration.

Off The supply has detected one of the following conditions:

Gdc overvoltage (the supply shuts down)

Gdc undervoltage (the supply shuts down)

Gdc overcurrent (the supply shuts down)

Gpower switch turned off (the supply is turned off)

Gac undervoltage

Ginsufficient 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.

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. The following procedures describe the correct way to remove and

insert your power supplies.

Interpreting

the Power Supply

Indicators

Troubleshooting Your Power

Supplies

Power Supply Modules

(Cat. No. 1771P4R and P6R)

Installation Data

Removing the Power Supply

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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