Description
The Federal Signal P-A250 (and its kit variant, K-P-A250) is a high-efficiency 250-Watt Class D amplifier module specifically designed for the PEGASYS® voice evacuation and mass notification systems. This module serves as a critical power component within the system, responsible for amplifying audio signals—such as emergency messages, public address announcements, and alarm tones—for distribution across large-scale facility speaker circuits. Its Class D architecture ensures high power density, reduced heat dissipation, and superior energy efficiency compared to traditional linear amplifier designs.
Key Technical Specifications
- Output Power: 250 Watts continuous power output.
- Amplifier Topology: Class D (Switching mode), providing high efficiency and compact thermal footprint.
- System Compatibility: Designed for integration within the Federal Signal PEGASYS fire alarm and mass notification control units.
- Frequency Response: Optimized for clear, intelligible voice reproduction and emergency tone signaling.
- Protection Circuitry: Integrated protection against short circuits, over-voltage, under-voltage, and thermal overload to ensure continuous operation during emergency events.
- Monitoring: Communicates amplifier status (fault, idle, active) back to the PEGASYS system controller for real-time supervision.
- Connections: Features plug-and-play connectors for simplified installation and maintenance within the amplifier chassis.
- Operating Voltage: Designed to operate on the system’s dedicated DC power backplane.
- Efficiency: High-efficiency conversion minimizes battery standby current requirements for the overall system.
- Construction: Ruggedized housing designed for reliable performance in industrial and commercial rack-mount environments.
Integration and Application
The P-A250 module is typically installed in an amplifier expansion chassis within the PEGASYS cabinet. It is configured to handle specific speaker zones. Key operational roles include:
- Voice Evacuation: Delivering high-decibel, clear instructions during fire or emergency evacuations.
- Zonal Control: Allowing the system to target specific areas of a building for localized messaging.
- Fault Supervision: Constant monitoring of the speaker line impedance to detect open or short circuits, which is a requirement for life-safety systems.
- Dual-Channel Support: Capable of operating in systems that require simultaneous playback of different audio tracks in different zones.
Related PEGASYS System Components
To ensure a fully functional mass notification and voice evacuation system, the P-A250 is frequently used in conjunction with the following components:
- PEGASYS Main Control Unit: The central intelligence unit governing system logic.
- P-CHASSIS: The rack-mount chassis housing for the amplifier modules.
- P-ZONE: Speaker zone card for routing audio to specific building areas.
- P-MICRO: System microphone module for live voice paging.
- P-BAT: Battery backup system to provide power during AC mains failure.
- P-NET: Network interface card for linking multiple PEGASYS controllers.
- Speaker Monitoring Module: Devices located at the end-of-line to verify speaker circuit continuity.
- P-DIGI: Digital audio interface card for high-fidelity signal transmission.
- P-SUP: System power supply unit.
- Emergency Notification Software: Configuration and management tools for tailoring evacuation sequences.
