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Allen-Bradley ControlLogix 1756-PBR2 Redundant Power Supply Module
The Allen-Bradley 1756-PBR2 is a 24V DC redundant power supply module designed for ControlLogix chassis. It features an 18–32V DC input range, provides a 75W power output with a maximum current rating of 13A, and supports hot-swappable automatic failover functionality to secure continuous runtime for mission-critical PLC architectures.
Description
Product Overview
The Allen-Bradley 1756-PBR2 is a high-availability redundant power supply module engineered for the ControlLogix platform. This industrial-grade power module provides uninterrupted power to the chassis backplane by utilizing an automatic, seamless failover mechanism. Designed specifically for mission-critical automation systems where unexpected downtime presents significant operational risk, the unit accepts a wide DC input range to deliver clean, regulated power directly to connected controllers, communication interfaces, and I/O modules.
Advanced Capabilities and Functional Benefits
- Automatic Failover Redundancy: When paired in a dual-configuration setup, the module shares the chassis load requirements equally. In the event of a primary source failure or internal fault, the secondary supply instantaneously assumes the full electrical load without interrupting system operations or dropping controller states.
- On-Line Hot-Swappability: The mechanical and electrical architecture allows for maintenance, removal, or replacement of a power module while the system remains completely energized. This feature eliminates the need to shut down processing machinery or control loops during routine service.
- Integrated Hardware Diagnostics: Built-in status indicators and predictive monitoring mechanisms provide real-time diagnostic visibility. These components actively track line health, load sharing behavior, and thermal performance to assist technicians in proactive troubleshooting.
- Ruggedized Design for Industrial Subsystems: Built to withstand demanding factory floor environments, the module operates across an extended temperature range and maintains full structural integrity under severe mechanical vibration conditions.
Technical Specifications
| Parameter | Specification Details |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Family | ControlLogix 1756 Subsystem |
| Model Number | 1756-PBR2 |
| Module Classification | Redundant PLC Chassis Power Supply |
| Input Voltage Range | 18 to 32 VDC (24 VDC Nominal) |
| Input Voltage Type | Direct Current (DC) |
| Total Power Output | 75.0 W |
| Maximum Output Current | 13.0 A at 1.2 VDC, 5.1 VDC, 24 VDC |
| Redundancy Capability | Fully Supported via Pairing |
| Operating Temperature Range | -20°C to +70°C |
| Storage Temperature Limits | -40°C to +85°C |
| Physical Dimensions | 14.2 x 17.5 x 13.2 cm |
| Net Weight | 1.45 kg |
| Current Product Lifecycle | Active / Existing |
Industrial Applications
- Continuous Process Industries: Managing critical infrastructure in oil and gas refining, chemical manufacturing, and pharmaceutical synthesis plants.
- High-Availability Infrastructure: Supplying reliable power to distributed water treatment facilities, pump stations, and municipal waste networks.
- Energy Management Systems: Ensuring stable operations within power generation facilities, substation control nodes, and utility distribution networks.
- Automated Material Handling: Regulating continuous production lines, high-speed sorting facilities, and heavy industrial assembly plants.
Additional information
| Weight | 1.45 kg |
|---|---|
| Country of Origin | USA |
| Dimension | 14.2 x 17.5 x 13.2 cm |
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