Description
IEPAF02: Product Overview
The ABB IEPAF02 is an AC field power supply module developed as part of ABB’s Bailey Infi 90 distributed control system (DCS) portfolio. It serves as a critical component for delivering regulated DC power to field-mounted devices in industrial process control applications, such as chemical processing, oil and gas, and power generation. By converting incoming AC voltage (120/240VAC) to a stable 24VDC output, the IEPAF02 ensures that sensors, actuators, and relays receive consistent power, enabling accurate data acquisition and control.
Role in Automation Systems:
In Bailey Infi 90 DCS architectures, the IEPAF02 is typically installed in the field power distribution unit (FPDU) and connected to the system’s power bus. It supplies power to:
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Sensors: Pressure, temperature, and flow sensors that monitor process variables.
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Actuators: Valves, motors, and switches that adjust process parameters.
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Relays: Electrical switches that trigger alarms or control circuits.Its ability to provide isolated, regulated power ensures that field devices operate reliably even in harsh industrial environments (e.g., high vibration, temperature fluctuations).
Core Functionality:
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Voltage Conversion: Efficiently converts 120/240VAC input to 24VDC output using switch-mode technology, minimizing energy loss.
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Regulation: Maintains a stable output voltage (±0.6% tolerance) despite fluctuations in input voltage or load changes, ensuring consistent performance of field devices.
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Protection: Integrated overvoltage protection (limits output to 28VDC max), short-circuit protection (shuts down output within 10ms), and thermal overload protection (disables output if internal temperature exceeds 85°C) safeguard both the module and connected devices.
Platform Benefits (Bailey Infi 90 DCS):
The IEPAF02 leverages ABB’s expertise in industrial automation, offering:
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Compatibility: Fully compatible with Bailey Infi 90 DCS, Symphony, and Harmony systems, allowing for easy integration into existing setups.
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Scalability: Supports multiple modules in parallel to increase output current capacity, making it suitable for large-scale applications.
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Diagnostics: LED indicators on the module front panel display power status (green = normal, red = fault) and output voltage levels, simplifying troubleshooting.
ABB IEPAF02
Technical Specifications
Model Number: IEPAF02
Manufacturer: ABB
Product Type: AC Field Power Supply Module
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Input Voltage: 120/240VAC (jumper-selectable)
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Input Frequency: 47–63 Hz
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Output Voltage: 24VDC ±0.6% (regulated)
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Output Current: Max 20A (continuous)
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Efficiency: ≥85% (typical at full load)
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Isolation: Galvanic isolation between input and output (1500VAC RMS)
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Protection Rating: IP20 (front panel)
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Operating Temperature: 0°C to +60°C (32°F to 140°F)
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Storage Temperature: -40°C to +85°C (-40°F to 185°F)
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Humidity: 5–95% non-condensing
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Dimensions (H x W x D): 133mm x 483mm x 114mm (5.25in x 19in x 4.5in)
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Weight: 1.2 kg (2.65 lbs)
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Certifications: CE, UL, CSA
Core Features & Customer Value
1. Stable Power for Critical Devices:
The IEPAF02’s regulated 24VDC output ensures that field devices (e.g., pressure sensors in a chemical reactor) receive consistent power, preventing false readings or malfunctions. For example, in an oil refinery, a stable power supply to flow sensors ensures accurate measurement of crude oil flow, optimizing refining processes.
2. Robust Protection for Harsh Environments:
The module’s overvoltage, short-circuit, and thermal overload protection safeguards against common industrial hazards. In a steel mill, where vibration and heat are prevalent, the IEPAF02’s thermal protection prevents damage from overheating, reducing downtime and maintenance costs.
3. Easy Integration with Bailey Systems:
Designed specifically for Bailey Infi 90 DCS, the IEPAF02 installs in standard FPDU slots and communicates with the system’s power management software. This simplifies setup and reduces the risk of configuration errors, saving time during installation.
4. Scalable for Growing Applications:
With a maximum output current of 20A per module, users can add multiple IEPAF02 modules in parallel to meet increasing power demands. For instance, a power plant expanding its sensor network can easily scale the power supply without replacing the entire system.
ABB IEPAF02
Typical Applications
The ABB IEPAF02 is widely used in industries requiring reliable power for field devices in distributed control systems:
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Chemical Processing:
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Powers pressure and temperature sensors in reactors and distillation columns.
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Example: In a petrochemical plant, the IEPAF02 supplies power to a pH sensor that monitors acid levels in a reaction vessel, ensuring safe and efficient processing.
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Oil and Gas:
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Drives actuators for valves in pipelines and offshore platforms.
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Example: On an offshore oil rig, the IEPAF02 powers a valve actuator that controls the flow of natural gas, maintaining pressure within safe limits.
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Power Generation:
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Supplies power to relays and sensors in turbine control systems.
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Example: In a coal-fired power plant, the IEPAF02 powers a temperature sensor that monitors turbine exhaust, optimizing combustion efficiency.
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