Description
Foxboro PO400BJ
Technical Specifications
- Input Voltage: Wide-range AC or DC input.
- Output Voltage: Regulated 24VDC or 5VDC for backplane.
- Power Output: Sufficient wattage to support a full complement of I/O modules.
- Efficiency: High-efficiency switching topology.
Functional Features
- Stable Power Delivery: Provides clean, ripple-free power to sensitive control electronics.
- Protection: Over-current, over-voltage, and short-circuit protection.
- Redundancy Ready: Can be paralleled with identical units for N+1 redundancy.
- Status Monitoring: Outputs power-good signals to the controller.
Application Scenarios
Installed in every I/A Series control cabinet to provide the primary power source for the backplane and mounted modules.
Performance Parameters
- Ripple & Noise: Less than 1% of output voltage.
- Hold-up Time: Sufficient to ride through brief power interruptions.
- MTBF: >100,000 hours.
Material Composition
High-quality magnetic components and long-life electrolytic capacitors. Metal chassis for heat sinking and EMI shielding.
Structural Characteristics
Compact form factor with front-panel LED indicators for output voltage and fault conditions. Screw terminals for input and output connections.
Working Principle
Uses switch-mode power conversion technology to step down and regulate the input voltage. Feedback loops continuously adjust the switching duty cycle to maintain a constant output voltage despite load or input variations.
Installation Requirements
Provide adequate clearance for airflow. Use properly sized wires for input and output connections. Ensure a solid earth ground connection.
Usage Precautions
- Do not operate with a shorted output.
- Allow the module to cool before handling after power-down.
- Periodically check terminal tightness to prevent arcing.
