Description

The ABB AAP3798102-00140 is a high-reliability, redundant-capable power supply module engineered for use in ABB’s AC 800M programmable logic controller (PLC) systems and Extended Automation System 800xA architectures. It delivers a stable, regulated 24 VDC output to power CPU modules, communication interfaces, and S800 I/O stations, ensuring uninterrupted operation in demanding industrial environments. As a core component of ABB’s modular control infrastructure, the AAP3798102-00140 supports hot-swap functionality and parallel redundancy—allowing two or more units to share load and provide failover protection without system downtime.

Designed for seamless integration into DIN rail-mounted control cabinets, the AAP3798102-00140 features robust electrical isolation, comprehensive protection mechanisms (including overvoltage, overcurrent, and short-circuit safeguards), and wide-range AC/DC input compatibility. Its compact form factor and efficient thermal design minimize space requirements while maximizing reliability. The AAP3798102-00140 is commonly deployed alongside AC 800M CPUs such as the 12KG04O-V0002 and I/O carriers like the 3BHB009884R0021, forming a fully coordinated, fault-tolerant automation backbone. Whether in a nuclear power plant, oil refinery, or municipal water facility, the AAP3798102-00140 ensures that control logic never loses power—making it indispensable for safety-critical and continuous-process applications.

Technical Specifications

Main Features and Advantages

High availability through true redundancy: The AAP3798102-00140 is designed from the ground up for mission-critical systems. It can be connected in parallel with another identical unit using ABB’s redundancy modules (e.g., RAP3798102-00100) to create a fault-tolerant power architecture. If one supply fails, the other instantly assumes full load—ensuring zero interruption to controllers, I/O, or communication links. This capability is essential in applications where unplanned shutdowns cost millions per hour, such as in ethylene crackers or grid-connected power stations.

Universal input and robust protection: Unlike many industrial PSUs limited to 110 VAC or 230 VAC, the AAP3798102-00140 accepts a wide range of both AC and DC inputs (85–264 VAC or 100–370 VDC), making it suitable for global deployment—even in regions with unstable grid quality or DC-powered substations. Built-in protections guard against surges, brownouts, and wiring faults, while the metal housing provides excellent EMI shielding and heat dissipation.

Hot-swap and easy maintenance: The AAP3798102-00140 supports live replacement during operation when installed in a redundant configuration. Technicians can remove and replace a faulty unit without powering down the control system—dramatically reducing mean time to repair (MTTR). Front-facing status LEDs (green = OK, red = fault) enable rapid diagnostics at a glance.

Seamless integration with ABB ecosystems: As an official ABB 800xA component, the AAP3798102-00140 is fully validated for use with AC 800M CPUs, S800 I/O, and CI communication modules. Its mechanical dimensions align precisely with ABB rack layouts, and its output characteristics match the power requirements of sensitive digital electronics. This eliminates compatibility guesswork and reduces engineering risk during system design or expansion.

Application Field

The AAP3798102-00140 is a cornerstone of power integrity in large-scale process automation. In fossil fuel and combined-cycle power plants, it supplies clean, uninterrupted 24 VDC to turbine control panels, boiler management systems, and emissions monitoring units—where even a millisecond of power loss could trigger a costly trip. Similarly, in nuclear facilities, its redundancy capability supports safety-related I/O racks that must remain operational under all conditions.

In the oil & gas sector, the AAP3798102-00140 powers offshore platform control systems, pipeline SCADA RTUs, and LNG terminal automation. Its wide input range accommodates both onshore AC grids and offshore DC microgrids, while its ruggedized design withstands salt spray, humidity, and vibration. Chemical and petrochemical plants rely on this power supply for reactor temperature control, emergency shutdown (ESD) logic, and flare stack ignition systems—applications where reliability directly impacts personnel safety and environmental compliance.

Water and wastewater utilities use the AAP3798102-00140 in remote pumping stations and treatment plants that operate unattended for months. Its long-life electrolytic capacitors and conformal-coated PCB options (available in certain variants) ensure stable performance in high-humidity environments. Even in mining and metals processing—where voltage sags and harmonic distortion are common—the AAP3798102-00140 maintains regulation thanks to its advanced switching topology. Across all these industries, the AAP3798102-00140 delivers the silent, steadfast power foundation that modern automation demands.

Related Products

• RAP3798102-00100: ABB Redundancy Module – enables parallel operation of two AAP3798102-00140 units

• AAP3798102-00120: Lower-current variant (5 A output); suitable for smaller I/O clusters

• AAP3798102-00160: Higher-power version (15 A); for dense CPU/I/O racks

• 12KG04O-V0002: AC 800M CPU module commonly powered by AAP3798102-00140

• CI854A: Profibus communication module requiring stable 24 VDC from this PSU

• 3BHB009884R0021: S800 I/O baseplate dependent on clean power from AAP3798102-00140

• TB550: Terminal block adapter for redundant power input wiring

• 3BSE018588R1: Battery backup module that complements AAP3798102-00140 during brief outages

Installation and Maintenance

Pre-installation preparation: Before installing the AAP3798102-00140, verify that the DIN rail is securely mounted and grounded within an enclosure rated for the operating environment (minimum IP54 recommended). Ensure adequate ventilation—maintain at least 25 mm clearance above and below the unit for convection cooling. Confirm that the input voltage source matches the specifications (85–264 VAC or 100–370 VDC) and that wiring complies with local electrical codes. If deploying redundancy, install the RAP3798102-00100 redundancy module and use matched AAP3798102-00140 units from the same production batch to ensure balanced current sharing.

Maintenance recommendations: Periodically inspect the status LED on the AAP3798102-00140—a solid green indicates normal operation, while red signals an internal fault or overload. Clean dust from ventilation slots during scheduled outages to prevent thermal derating. Although the unit is rated for 70°C ambient, prolonged operation above 60°C will reduce service life; consider forced air cooling in high density cabinets. In redundant setups, test failover annually by simulating a power supply failure. Store spare AAP3798102-00140 units in dry, temperature-controlled conditions to preserve capacitor integrity.