1771-P2 PLC-2/PLC-3 Series Power Supply Module | Allen-Bradley

2026-04-17T02:23:50-07:00

Type: Power Supply Module
Price: 66.00

Product Overview

The Allen-Bradley 1771-P2 serves as the primary power source for the 1771 Series I/O chassis. This module converts incoming AC line voltage into a regulated 5V DC output, feeding power directly to the chassis backplane. It eliminates the need for external DIN-rail power supplies, keeping your control panel layout compact and organized. The unit features an integrated LED status indicator to confirm proper voltage levels instantly. We supply this item as a 100% Brand New, factory-sealed unit.

Technical Specifications

Parameter | Specification
Manufacturer | Allen-Bradley (Rockwell Automation)
Product Type | PLC Power Supply Module
Output Voltage | 5V DC (to Backplane)
Mounting | 1771 Series I/O Chassis (Internal Slot)
Status Indicators | Output Power LED (Green)
Input Voltage | AC Line Voltage (See specific sub-model rating)
Condition | 100% Brand New

Engineering Advantages

Direct Backplane Power Integration
The 1771-P2 plugs directly into the 1771 chassis slots, utilizing the backplane to distribute power to all installed I/O modules and processors. This design removes the clutter of external wiring and saves valuable panel space. By integrating the power supply into the rack, you reduce installation time and improve the overall aesthetic of the control cabinet.

Visual Status Monitoring
Troubleshooting becomes immediate with the onboard Output Power indicator. This LED illuminates when the module successfully supplies 5V DC to the backplane. Maintenance teams can verify system health at a glance without needing a multimeter, allowing for faster diagnosis of power-related faults during routine inspections.

Scalable Power Architecture
This module belongs to a family designed for flexibility. While the 1771-P2 operates as a standalone unit, the 1771 platform supports paralleling specific models (using the 1771-CT cable) to double current capacity up to 16A. For critical processes, the system also supports redundant configurations (using -P4R or -P6R models) to ensure single-failure protection, making the 1771 series adaptable to both simple and high-availability applications.

FAQs

Q: Does the 1771-P2 power external 24V DC sensors?
A: The 1771-P2 primarily generates 5V DC for the chassis backplane to power the processor and I/O logic. Most 1771 digital input/output modules require separate external 24V DC wiring for field-side sensor power, as the backplane power is reserved for internal logic.

Q: How do I know if the power supply is functioning correctly?
A: The module features a dedicated "Output Power" LED on the front faceplate. If this light is illuminated, the unit is actively supplying 5V DC to the chassis. If the light is off, check the input fuses and AC line connections.

Q: Can I use the 1771-P2 in a redundant setup?
A: The 1771-P2 is a standard power supply. For redundancy, you typically use specific redundant models (like the 1771-P4R). However, the 1771-P2 serves as an excellent replacement for standard single-supply configurations in existing PLC-5 systems.