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What This Power Supply
Package Contains
Installing the Power Supply
Module
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
Installation Data
Power Supply Modules
(Cat. No. 1771 P4R and P6R)
1
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Summary of Contents for Allen-Bradley 1771-P4R
- Page 1 What This Power Supply When you receive your 1771-P4R or -P6R power supply, you should see Package Contains the following in the box: one 1771-P4R or 1771-P6R power supply module...
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Page 2: Set The Jumpers
Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) 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. - Page 3 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) 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).
- Page 4 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.
- Page 5 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) Figure 3 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.
- Page 6 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) 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).
- Page 7 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) Connect Input Power Figure shows the overall configuration of the ac power connections. To correctly connect the wire to the terminal: Connect the high side of the power source to the L1 terminal of the power supply.
- Page 8 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) To connect a wire to a terminal: Strip 0.35 inches of insulation off the wire. 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).
- Page 9 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) Interpreting the Power Supply Your power supply has two indicators located in the upper half of the Indicators 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.
- Page 10 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) Removing the Power Supply Flip the POWER switch on the front panel to the Off position, only on the unit to be removed. Remove the ac input terminal block, the alarm relay terminal block, and the redundant cables only from the unit to be removed.
- Page 11 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) 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.
- Page 12 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) 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.
- Page 13 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) 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.
- Page 14 Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) 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.
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Page 15: Specifications
Installation Data Power Supply Modules (Cat. No. 1771 P4R and P6R) Specifications 1771 P4R 1771 P6R Input Voltage 120V ac 220V ac Input Voltage Range 97 132V ac rms 194 264V ac rms Weight 2 lbs (0.84 kg) Frequency 47 63Hz Output Voltage 5V dc Output Current... - Page 16 (Cat. No. 1771 P4R and P6R) As a subsidiary of Rockwell International, one of the world’s largest technology companies — Allen-Bradley meets today’s challenges of industrial automation with over 85 years of practical plant-floor experience. More than 11,000 employees throughout the...