The Allen Bradley 1771-P6R is a PLC-5 series redundant rack-mounted power supply module designed for the 1771 I/O chassis platform. It delivers regulated 5V DC backplane power and supports redundancy configurations to ensure continuous operation in mission-critical industrial automation systems.
This module is widely used in high-availability environments where system downtime must be minimized through redundant power architecture.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Catalog Number | 1771-P6R |
| Module Type | Redundant Power Supply Module |
| System Family | PLC-5 / 1771 I/O |
| Input Voltage | 194–264V AC |
| Nominal Input | 220V AC |
| Frequency | 47–63 Hz |
| Output Voltage | 5V DC (backplane supply) |
| Output Current | up to 8 A |
| Power Capacity | ~59 W |
| Backplane Load | PLC-5 1771 chassis power distribution |
| Redundancy Support | Yes (parallel / N+1 configuration) |
| Configuration | Multiple supply daisy-chain capability |
| Fuse Rating | 1.5 A slow-blow, 250V |
| Sensing Mode | Local / remote sensing selectable |
| Status Indicators | Power active / redundancy status LEDs |
| Wiring / Accessories | Redundancy cable included |
| Mounting Type | 1771 chassis slot (single module slot, multi-slot redundancy setup) |
| Cooling Method | Natural convection |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Weight | ~1.3 kg |
| Dimensions (L×W×H) | 305 mm × 254 mm × 229 mm |
System Role Overview
The 1771-P6R is designed as a high-availability power backbone component for PLC-5 systems. Unlike standard single power supplies, it supports redundant configurations to ensure continuous system uptime even if one supply fails.
Core functions include:
- Providing regulated 5V DC backplane power
- Supporting redundant (N+1) power architectures
- Ensuring uninterrupted PLC-5 system operation
- Enabling load sharing between multiple supplies
- Monitoring power health and redundancy status
It is typically used in critical industrial installations where downtime is unacceptable.
Recommended Related Modules
| Model | Function |
|---|---|
| 1771-P4S | Standard single power supply module |
| 1771-A4B | PLC-5 I/O chassis |
| 1771-ALX | Local I/O adapter module |
| 1771-SN | Remote I/O scanner module |
| 1771-DMC | Communication module |
| 1771-OBD | DC output module |
Popular Allen Bradley PLC-5 Modules
| Model | Function |
|---|---|
| 1785-L40B | PLC-5 processor module |
| 1771-A1B | Compact I/O chassis |
| 1771-A4B | Standard I/O chassis |
| 1771-SN | Remote I/O scanner |
| 1771-DMC | Data Highway communication module |
