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                    • A-B 1771-P4R PLC Power Supply Module

                      The Allen-Bradley 1771-P4R is a redundant power supply module for the PLC-5 / 1771 I/O system. It converts 120 V AC input power into 5 V DC power for the chassis backplane and supports redundant power supply configurations for improved system availability.

                      

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                      Key Technical Specifications

                      Parameter	Specification
                      Brand	Allen-Bradley (A-B)
                      Model	1771-P4R
                      Product Type	Redundant PLC Power Supply Module
                      Product Family	PLC-5 / 1771
                      Nominal Input Voltage	120 V AC
                      Input Voltage Range	97–132 V AC
                      Input Frequency	47–63 Hz
                      Maximum Real Input Power	59 W
                      Maximum Apparent Input Power	92 VA
                      Output Voltage	5 V DC
                      Maximum Backplane Output Current	8 A
                      Chassis Compatibility	Allen-Bradley 1771 I/O chassis
                      Mounting	Chassis-mounted
                      Redundancy	Supports redundant power supply configurations
                      Country of Origin	Mexico
                      Lifecycle Status	Discontinued

                      

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                      Features and Advantages

                      • Provides regulated 5 V DC power to compatible PLC-5 chassis backplanes.

                      • Supports redundant power supply arrangements to improve system availability.

                      • Includes power supply status and fault monitoring features.

                      • Designed for legacy industrial control systems.

                      • Suitable for replacement and maintenance of existing Allen-Bradley PLC-5 installations.

                      Typical Applications

                      • PLC-5 control systems

                      • Industrial automation cabinets

                      • Manufacturing and process control systems

                      • Legacy production equipment

                      • Industrial I/O chassis power supply replacement

                      Important Notes

                      • This model is discontinued by Rockwell Automation.

                      • Confirm the chassis configuration and redundancy requirements before installation.

                      • The 1771-P4R is designed for a 120 V AC input, not a 24 V DC input.

                      • Verify the nameplate, revision, and included redundancy cable when ordering.

• • • • • • • .The structure and details of the product：

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