ABB 07EA90-SI
ABB 07EA90-SI
ABB 07EA90-SI
ABB 07EA90-SI

ABB 07EA90-SI | Bailey INFI 90 Power Supply Module

  • Brand:​ ABB (formerly Bailey Controls)
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    Model:​ 07EA90-SI
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    Product Type:​ Power Supply Module
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    Series:​ INFI 90
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    Core Function:​ Provides regulated DC power to the INFI 90 Process Control Unit (PCU) and its modules.
  • ••
    Key Specs:​ Input: 120/240V AC, Output: +5V DC, +15V DC, -15V DC, Redundant capability.
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Description

07EA90-SI: Product Overview
The 07EA90-SI is a power supply module designed for ABB’s (formerly Bailey Controls) INFI 90 distributed control system. This critical component is installed in the power supply slot of an INFI 90 Process Control Unit (PCU) and is responsible for converting incoming AC line voltage to the precise, regulated DC voltages required by the system’s intelligent modules, including controllers, I/O modules, and communication interfaces. The module ensures stable, clean power delivery to support the reliable operation of the control system in industrial environments.
The power supply features a robust design with overvoltage and overcurrent protection to safeguard the sensitive electronic components within the PCU. It is engineered to operate in the typical temperature and electrical noise conditions found in industrial settings such as power generation plants and process facilities. The module supports redundant configuration when used with a companion unit and a redundancy control module, allowing for continuous system operation even if one power supply fails.

ABB 07EA90-SI

ABB 07EA90-SI

07EA90-SI: Technical Specifications
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    Model Number:​ 07EA90-SI
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    Manufacturer:​ ABB (Bailey Controls)
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    Product Type:​ Power Supply Module
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    Compatible System:​ INFI 90 DCS
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    AC Input Voltage:​ 120V AC / 240V AC (switch selectable), 50/60 Hz
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    DC Output Voltages:
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      +5 VDC (logic power)
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      +15 VDC (analog power)
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      -15 VDC (analog power)
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    Output Power:​ 150 Watts (total)
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    Efficiency:​ >75%
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    Redundancy:​ Supports N+1 redundancy with appropriate redundancy control module
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    Protection:​ Overvoltage and overcurrent protection on all outputs
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    Status Indicators:​ LED indicators for power good and fault conditions
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    Operating Temperature:​ 0°C to 60°C
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    Cooling:​ Convection cooling (no fan)
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    Safety Standards:​ UL 508, CSA 22.2, IEC 61131-2

    ABB 07EA90-SI

    ABB 07EA90-SI

Core Features & Customer Value
The module’s primary value is providing highly reliable and clean power, which is the foundation for the stable operation of the entire PCU. Voltage fluctuations or electrical noise on the power rails can cause unpredictable behavior in digital logic and analog measurement circuits. The 07EA90-SI’s robust regulation and filtering mitigate these issues, leading to higher system availability and reduced nuisance faults. For maintenance teams, the LED status indicators provide immediate local diagnostics, allowing for quick assessment of the power supply’s health.
The capability for redundant configuration is a critical feature for high-availability applications. In a redundant setup, if the primary power supply fails, the secondary unit takes over the load without interruption to the control process. This is essential in continuous process industries where an unplanned shutdown can result in significant production loss or safety concerns. The hot-swappable design (in redundant systems) allows for the replacement of a faulty unit without powering down the PCU, further minimizing downtime.
Typical Applications
In a coal-fired power plant, the 07EA90-SI powers a PCU controlling the burner management system. The reliable power ensures continuous monitoring of flame scanners, fuel valves, and critical temperatures, preventing boiler trips and enabling safe, efficient operation.
In a water treatment facility, the module supplies power to a PCU managing chemical dosing and filtration processes. Stable analog power is crucial for the accurate measurement of pH, turbidity, and flow rates, ensuring treated water meets quality standards.

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