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- 1756-PB75R
- ControlLogix ControlNet Communication Module
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- 17.5 × 14.5 × 13.7 cm
- 1.45kg
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Industrial Technical Report – 1756-PB75R ControlLogix Redundant DC Power Supply Module
Product Overview
The 1756-PB75R is a redundant DC power supply module designed for ControlLogix automation systems. It provides regulated 24V DC input conversion into stable backplane power for PLC chassis systems, ensuring uninterrupted operation of controllers, I/O modules, and communication units.
The key feature of this model is redundant operation capability, allowing two power modules to share load and provide backup support. If one module fails, the second continues powering the system without interruption, significantly improving system availability and reliability.
This model is widely used in critical industrial environments where downtime is unacceptable and continuous operation is required.
Brand Information
The product belongs to a globally recognized industrial automation ecosystem specializing in PLC systems, industrial communication, motion control, and process automation technologies.
It is widely used in:
- Industrial automation systems
- Smart manufacturing platforms
- Process control industries
- Energy and utility systems
- High-reliability control networks
Key characteristics include:
- High system reliability
- Strong redundancy architecture
- Industrial-grade durability
- Modular system design
- Long operational lifecycle
Product Series
ControlLogix Modular PLC Platform
The 1756-PB75R belongs to the ControlLogix series, a modular automation platform designed for high-performance industrial applications.
Key features include:
- Fully modular architecture
- High-speed communication capability
- Distributed control support
- Redundancy system integration
- Flexible system expansion
- Multi-module compatibility
Supported modules include:
- CPU processors
- I/O modules
- Communication modules
- Motion control modules
- Safety modules
- Power supply modules
The 1756-PB75R is responsible for redundant DC power delivery to the chassis backplane.
Technical Parameters
Detailed Specification Table
| Parameter | Specification |
|---|---|
| Model | 1756-PB75R |
| Product Type | Redundant DC Power Supply Module |
| Series | ControlLogix |
| Input Voltage Range | 18–32V DC |
| Nominal Input | 24V DC |
| Maximum Input Power | 110 W |
| Output Power | 75 W |
| Backplane Current (5V DC) | 13 A |
| Backplane Current (3.3V DC) | 4 A |
| Backplane Current (1.2V DC) | 1.5 A |
| Backplane Current (24V DC) | 2.8 A |
| Redundancy Function | Yes (load sharing + backup mode) |
| Isolation Voltage | 250V continuous |
| Inrush Current | ≤ 30 A |
| Hold-up Time | ~20–40 ms |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Mounting Type | Chassis left-slot installation |
| Cooling Method | Natural convection |
| EMC Protection | Industrial-grade shielding |
| Dimensions | 17.5 × 14.5 × 13.7 cm |
| Weight kg（ ） | 1.45 kg |
Product Description
The 1756-PB75R converts DC input power into regulated backplane voltage while supporting redundant operation. Two identical modules can be installed in the same chassis to ensure continuous power delivery.
Under normal operation, both units share load. If one unit fails, the other immediately takes over without system shutdown, ensuring uninterrupted industrial control.
It is designed for high-availability systems requiring continuous uptime.
Product Applications
Industrial Automation Systems
Used in:
- Continuous production lines
- Robotics control systems
- Assembly automation
- Packaging systems
Energy Industry
Applied in:
- Power generation control systems
- Solar and wind energy systems
- Substation automation
- Battery storage systems
Oil & Gas Industry
Used in:
- Pipeline monitoring systems
- Offshore platforms
- Refinery control systems
- SCADA networks
Transportation Systems
Used in:
- Railway signaling systems
- Metro control infrastructure
- Traffic management systems
- Electrified transport systems
Heavy Industry
Used in:
- Steel production systems
- Mining automation
- Cement production lines
- Large-scale machinery control
Product Advantages
1. Redundant Power Architecture
Ensures uninterrupted system operation during power module failure.
2. High System Availability
Designed for mission-critical applications requiring continuous uptime.
3. Stable DC Output
Provides consistent backplane voltage for all chassis modules.
4. Strong Industrial Reliability
Withstands vibration, heat, and electrical interference.
5. Load Sharing Capability
Improves efficiency and reduces stress on individual modules.
6. Extended Service Life
Built with industrial-grade components for long-term operation.
Recommended Models (Same Series or Related)
ControlLogix Power Supply Family
| Model | Type | Input | Key Feature | Dimensions | Weight kg（ ） |
|---|---|---|---|---|---|
| 1756-PB75R | Redundant DC Supply | 18–32V DC | Redundancy + load sharing | 17.5×14.5×13.7 cm | 1.45 kg |
| 1756-PB75 | DC Power Supply | 18–32V DC | Standard high-capacity DC module | 14.8×14.2×13.5 cm | 1.55 kg |
| 1756-PB72 | DC Power Supply | 18–32V DC | Medium DC module | 14.5×11.2×14.0 cm | 0.95 kg |
| 1756-PB50 | DC Power Supply | 18–32V DC | Compact DC module | 14.2×14.0×13.2 cm | 1.00 kg |
| 1756-PA75 | AC Power Supply | 85–265V AC | AC input version | 14.8×14.2×13.5 cm | 1.58 kg |
| 1756-PSCA2 | Chassis Adapter | N/A | Redundancy interface module | 13×12×6 cm | 0.85 kg |
Recommended Popular Models (Same Platform Ecosystem)
Widely Used Automation Modules
| Model | Function | Network | Role | Dimensions | Weight kg（ ） |
|---|---|---|---|---|---|
| 1756-L85E | PLC Controller | EtherNet/IP | Main processor module | 15×14×13 cm | 0.65 kg |
| 1756-EN2TR | Ethernet Module | EtherNet/IP | Communication module | 13×14×12 cm | 0.48 kg |
| 1769-L36ERM | Compact PLC | Ethernet | Mid-range control system | 15×11×10 cm | 0.75 kg |
| 1734-AENTR | I/O Adapter | EtherNet/IP | Remote I/O gateway | 7×7×7 cm | 0.20 kg |
| 5069-L320ER | Advanced PLC | EtherNet/IP | High-performance controller | 13×10×9 cm | 0.54 kg |
Installation Notes
The module is installed in the left slot of a compatible ControlLogix chassis and connects directly to the system backplane.
Key requirements:
- Ensure correct DC input range
- Maintain proper grounding
- Provide ventilation clearance
- Install redundancy pair correctly
- Avoid high-vibration environments
Maintenance Characteristics
- Hot-swappable design
- Fast fault replacement
- Simple diagnostic indicators
- Low maintenance requirement
- Long operational lifecycle
Final Summary
The 1756-PB75R is a redundant DC power supply module designed for high-availability ControlLogix systems. Its core strength lies in redundancy, ensuring uninterrupted operation even in case of hardware failure.
With stable output, strong industrial durability, and advanced redundancy architecture, it is widely used in mission-critical automation environments where continuous operation and system reliability are essential.