Description
Description
The Foxboro AD908AA is a high-reliability power supply assembly designed specifically for the Foxboro I/A Series (Intelligent Automation) distributed control system. This module serves as a critical power conversion unit, providing stable, regulated DC power to Field Bus Modules (FBMs) and associated communication infrastructure. Engineered for demanding industrial environments, the AD908AA ensures consistent system operation by mitigating the effects of electrical noise, transients, and fluctuating load conditions, thereby protecting sensitive control hardware from resets and failures.
Features
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Regulated Output: Provides stable 24 VDC output to ensure consistent performance of downstream I/O components.
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Robust Protection: Integrated circuitry for over-voltage and over-current protection to shield system hardware.
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Redundancy Support: Designed for use in redundant power configurations, allowing for seamless failover in critical control applications.
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Status Monitoring: Front-panel indicators provide immediate visual verification of power health and operational status.
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Industrial Design: Modular plug-in architecture optimized for thermal efficiency and resistance to EMI/RFI interference.
Applications
The AD908AA is widely deployed in mission-critical process automation environments, including oil and gas refineries, petrochemical processing, power generation facilities, and municipal wastewater treatment plants where system uptime is paramount.
Technical Specifications
| Parameter |
Specification |
| Model |
AD908AA |
| Input Voltage |
120/240 VAC or 125 VDC |
| Output Voltage |
24 VDC (Regulated) |
| Output Current |
2.0 A (Continuous) |
| Operating Temperature |
0 to 60 deg C |
| Storage Temperature |
-40 to 85 deg C |
| Relative Humidity |
5 to 95% (Non-condensing) |
| Cooling Method |
Natural Convection |
| Mounting |
Vertical or Horizontal Baseplate |
Installation Guidelines
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Power Safety: Always disconnect the primary power source before installing or removing the module from the baseplate.
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ESD Handling: Use standard electrostatic discharge (ESD) precautions, including a grounded wrist strap, when handling the module to prevent damage to internal circuitry.
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Ventilation: Ensure adequate clearance around the module to allow for natural convection cooling; do not obstruct air intake or exhaust paths.
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Mounting: Ensure the module is fully seated and secured to the baseplate to maintain proper electrical contact and structural integrity.
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Wiring: Use appropriate shielded cabling for input/output connections to minimize EMI/RFI interference in high-noise environments.
FAQ
What is the primary function of the AD908AA?
The AD908AA acts as a power supply module for the Foxboro I/A Series, converting AC or DC input power into a regulated 24 VDC supply for FBMs and other system components.
Can this module be used in redundant systems?
Yes, the AD908AA is designed to support redundant power configurations, which helps maintain system availability if one power supply unit fails.
Is this module compatible with all I/A Series systems?
The AD908AA is specific to the I/A Series infrastructure. Please verify your system's power requirements and baseplate compatibility before installation.
