Description
Product Name: 1756-PSCA2K Allen Braley I/O module
Product details:
The Allen-Bradley 1756-PSCA2K is a ControlLogix Redundant Power Supply Chassis Adapter. It is a critical component for high-availability systems where power reliability is paramount. The “K” suffix indicates that the module features a conformal coating, providing extra protection against harsh, corrosive environments.
Product Overview
The 1756-PSCA2K acts as a physical and electrical interface between the ControlLogix chassis and the redundant power supplies. It is installed directly onto the power supply slot of a standard 1756 chassis and aggregates power from two independent redundant power supplies (such as the 1756-PA75R or 1756-PB75R).
Technical Specifications
| Feature | Specification |
| Module Type | Redundant Power Supply Chassis Adapter |
| Input Voltage Range | Determined by the connected power supplies |
| Chassis Compatibility | ControlLogix 1756 Series (Standard and Series B/C) |
| Backplane Output Current | 1.5A @ 1.2V DC; 4A @ 3.3V DC; 13A @ 5.1V DC; 2.8A @ 24V DC |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Conformal Coating | Yes (Suffix “K”) |
| Isolation Voltage | 250V (continuous) |
| Mounting | Left side of the 1756 Chassis |
Product Advantages
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System Availability: Enables a redundant power configuration. If one power supply fails, the 1756-PSCA2K ensures the second supply takes over seamlessly without interrupting the controller or I/O operations.
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Harsh Environment Protection: The Conformal Coating protects internal circuitry from moisture, salt spray, fungus, and corrosive chemical vapors, extending the equipment’s lifespan in industrial settings.
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Status Monitoring: It provides diagnostic information to the system, allowing maintenance teams to identify power health issues before they result in a total system shutdown.
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Ease of Replacement: Supports the replacement of a failed power supply unit while the system remains energized (Hot Swappable).
Important Considerations & Precautions
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Cable Lengths: Use only official Allen-Bradley redundant power cables (e.g., 1756-CPR2). Excessive cable length or non-standard wiring can lead to voltage drops.
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Ventilation: Ensure adequate clearance around the adapter and the external power supplies to prevent overheating, especially in high-density enclosures.
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Compatibility: Ensure that both power supplies connected to the adapter are of the same type (e.g., two AC units or two DC units) for optimal performance.
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Grounding: Proper chassis grounding is essential to prevent electrical noise and ensure the safety of the redundant system.
Product Applications
The 1756-PSCA2K is typically used in mission-critical applications where downtime is extremely costly or dangerous:
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Oil & Gas: Control systems for refineries and offshore platforms where corrosive sea air is present.
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Water/Wastewater: Chemical treatment plants requiring high reliability and protection against humidity.
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Power Generation: Continuous monitoring and control of turbines and plant utilities.
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Pharmaceuticals: Maintaining environmental controls and batch processing where power loss results in total product loss.
Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!
We have the same series of models in stock. If you don’t find the model you need, please contact us and we will provide you with an official quotation！
Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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