Description
Foxboro PO904HB
Technical Specifications
- Input Voltage: Wide-range AC or DC input.
- Output Voltage: Regulated 24VDC or 5VDC.
- Redundancy: N+1 or 1:1 hot-standby configuration.
- Efficiency: High-efficiency switching power supply.
Functional Features
- Seamless Switchover: Zero-break transfer during power source failure.
- Comprehensive Protection: Over-voltage, over-current, short-circuit, and over-temperature protection.
- Load Sharing: Active current sharing for parallel redundant operation.
- Status Monitoring: Relay outputs and LEDs for power-good and fault conditions.
Application Scenarios
Critical control cabinets in refineries, power plants, and pharmaceutical facilities where any power interruption could result in safety hazards or significant production losses.
Performance Parameters
- Hold-up Time: Sufficient to ride through brief mains sags.
- Ripple & Noise: Extremely low output ripple for sensitive electronics.
- MTBF: >150,000 hours.
Material Composition
Premium-grade capacitors and magnetic components for long life. Metal chassis acts as a heat sink and EMI shield.
Structural Characteristics
Compact, high-power-density design. Front panel includes voltage adjustment trimmer (if applicable), status LEDs, and test points.
Working Principle
Converts AC/DC input to regulated DC output using high-frequency switching. In redundant mode, multiple units share the load equally; if one fails, the remaining unit(s) instantly take over the full load without voltage dip.
Installation Requirements
Provide adequate ventilation for cooling. Use properly sized input and output wiring. Connect the redundancy diode/oring module if required by the system design.
Usage Precautions
- Do not block air intake or exhaust vents.
- Test redundancy switchover during scheduled maintenance.
- Replace the module if fault indicators persist after troubleshooting.
