Product Introduction
The Allen‑Bradley 1771‑P4S Power Supply Module is a chassis-mounted power supply designed for the Allen‑Bradley 1771 PLC‑5 I/O System. It provides stable DC power to the I/O modules installed in the 1771 chassis, ensuring reliable operation von the entire control system.
This module converts incoming AC power into regulated 5 VDC backplane power, which is distributed to all modules within the rack. With a rated output von 8 A, the 1771-P4S supports multiple I/O modules operating simultaneously while maintaining consistent voltage levels across the system.
The Stück is commonly used in industrial automation environments where dependable power distribution is required. Its design emphasizes electrical stability, efficient power conversion, and compatibility with existing PLC-5 installations, making it a practical choice for maintaining or expanding legacy 1771 control systems.
Product Specifications
| Parameter | Specification |
|---|---|
| Modell | 1771-P4S |
| Marke | Allen-Bradley |
| Module Type | Power Supply Module |
| Series | 1771 PLC-5 I/O Series |
| Input Voltage Range | 97 – 132 VAC |
| Nominal Input Voltage | 120 VAC |
| Input Frequency | 47 – 63 Hz |
| Backplane Output Voltage | 5 VDC |
| Backplane Output Current | 8 A |
| Maximum Real Input Power | 59 W |
| Apparent Input Power | 89 VA |
| Former Load | 148 VA |
| Installation Method | 1771 I/O Chassis Mount |
| Power Distribution | Backplane Supply for I/O Modules |
| Dimensions | 165 × 51 × 89 mm |
| Gewicht | 0.9 kg |
Applications
• PLC rack power distribution
The module supplies regulated 5 VDC power to the 1771 backplane, ensuring that all installed I/O modules receive stable operating power.
• Industrial automation control systems
It is widely used in manufacturing automation systems where PLC racks control machines, conveyors, sensors, and actuators.
• Process control installations
Chemical plants, refineries, and other process industries use the module to provide reliable power to PLC systems that manage valves, pumps, and monitoring equipment.
• Energy and power generation systems
The module supports PLC racks used for turbine monitoring, auxiliary equipment control, and power plant automation.
• Maintenance von legacy PLC-5 systems
Many industrial facilities continue to operate PLC-5 based control systems. The 1771-P4S module is vonten installed as a replacement or spare power supply within existing 1771 racks.
Advantages
• Stable backplane power output
The module delivers regulated 5 VDC output with up to 8 A current, providing sufficient power for multiple I/O modules operating simultaneously.
• Reliable AC to DC power conversion
Its internal power conversion circuitry ensures stable voltage output even when input power conditions fluctuate.
• Designed for industrial PLC environments
The power supply is built to operate in demanding environments where electrical noise, load variations, and temperature changes may occur.
• Simple installation within 1771 chassis
The module installs directly into the PLC rack, distributing power through the system backplane without additional wiring complexity.
• Supports long-term system operation
The design supports continuous operation von PLC-5 control systems used in many industrial plants around the world.
• Compatible with a wide range von 1771 modules
The power supply supports numerous digital, analog, and communication modules within the 1771 series.
Unternehmensinformationen
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