Enable Power Redundancy with the Allen-Bradley 1756-PSCA2 Chassis Adapter
The 1756-PSCA2 provides critical redundancy capability for ControlLogix power systems. This chassis adapter module enables seamless integration of redundant power supplies. It ensures continuous operation for mission-critical automation applications without interruption.
Key Technical Specifications & Electrical Ratings
- Module Type: Passive chassis adapter for redundant power systems
- Backplane Current: 125 mA at 24V DC for adapter operation
- Power Dissipation: 25.7W at 30°C, 21.3W at 60°C maximum
- Current Capacity: 15A at 5.1V DC, 4A at 3.3V DC, 2.8A at 24V DC
- Terminal Blocks: Three removable blocks (1756-TBSH or 1756-TBNH)
- Connection Cable: Requires 1756-CPR2 cable for power supply link
- Minimum Clearance: 5 inches (12.7 cm) bend radius for cable routing
- Hazardous Location: Ex nA IIC T4 Gc certification for safe operation
Physical Specifications & Mounting Details
- Dimensions: 5.51 × 4.41 × 5.71 inches (140 × 112 × 145 mm)
- Weight: 8.1 ounces (0.228 kg) lightweight compact design
- Mounting Position: Left side of ControlLogix chassis horizontally
- Enclosure Type: Open-style passive device for cabinet installation
- Grounding: Additional protective earth-ground stud may be required
- Wire Routing: Keep lengths short to minimize resistance issues
- Chassis Compatibility: Standard Series B ControlLogix chassis
Environmental & Safety Specifications
- Operating Temperature: 0°C to +60°C (32°F to 140°F) range
- Certification Standards: EN 60079-15, IECEx UL 14.0008X
- Protection Type: Ex nA IIC T4 Gc for hazardous environments
- Installation: Requires proper grounding per application requirements
- Location Rating: Suitable for Zone 2 hazardous locations
- Pollution Degree: Level 2 for standard industrial environments
Compatible Power Supplies & System Integration
- Redundant Power Supplies: 1756-PA75R and 1756-PB75R models
- Connection System: Single 1756-CPR2 cable per power supply
- System Configuration: One adapter supports two power supplies
- Backplane Connection: Single power input to chassis backplane
- Power Distribution: Manages dual input sources seamlessly
- Fault Tolerance: Maintains operation during power supply failure
Packaging & Shipping Information
- Package Contents: One 1756-PSCA2 chassis adapter module
- Shipping Methods: Global delivery via FedEx, UPS, and DHL
- Quality Assurance: 12-month comprehensive warranty coverage
Expert Technical Questions Answered
- How many power supplies can this adapter support simultaneously?
- The 1756-PSCA2 supports two redundant power supplies for N+1 configuration.
- What cable is required to connect power supplies to this adapter?
- You need 1756-CPR2 cables, one for each power supply in the redundant system.
- Can I use this adapter with non-redundant power supplies?
- No, it specifically requires 1756-PA75R or 1756-PB75R redundant power supplies.
- What is the purpose of the removable terminal blocks?
- They provide convenient connection points for power input and system monitoring.
- Does this adapter require external power for operation?
- No, it is a passive device that draws minimal power from the connected supplies.
Technical Resources & Compatible Products
- Download the complete technical specification manual here: Download ControlLogix Manual
- Pair with compatible power supplies like the 1756-PA75K
- For system connectivity, consider 1756-RMC1 fiber optic cables
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