ABB 3BHE013940R0002 UNS0868B-P,V2 Power Supply Module

Overview

The 3BHE013940R0002 (UNS0868B-P V2) is a high-performance DC power supply module developed by ABB for use in excitation control, power regulation, and automation control architectures.
It is engineered to deliver a stable and low-ripple 24 VDC output for critical control electronics, particularly within UNITROL excitation systems and ABB-based control platforms.

Designed for continuous operation in electrically and thermally demanding environments, this module emphasizes conversion efficiency, electrical protection, and operational stability over long service lifecycles.

Key Technical Characteristics

This power supply module combines compact industrial design with robust electrical performance to support sensitive control hardware.

High conversion efficiency minimizes internal heat generation and improves overall system reliability.
Wide ambient temperature tolerance allows installation in cabinets with limited climate control.
Integrated protection mechanisms safeguard downstream controllers against abnormal supply conditions.
Output voltage stability is optimized for PLCs, DCS controllers, excitation regulators, and interface modules.

Electrical Specifications

• Input Voltage Range: 110 / 220 VAC, automatic dual-range selection

• Nominal Input Frequency: 50 / 60 Hz

• Output Voltage: 24 VDC regulated

• Rated Output Current: 13 A

• Maximum Output Power: Approximately 312 W

• Conversion Efficiency: Up to 97%

• Output Regulation: Tight regulation suitable for precision control electronics

• Protection Functions: Overvoltage, overcurrent, short-circuit, and thermal protection

Environmental Specifications

• Operating Temperature Range: –20 °C to +70 °C

• Storage Temperature: –40 °C to +85 °C

• Designed for continuous industrial duty

• Suitable for vibration-prone electrical cabinets and excitation panels

Mechanical Information

Due to variations between catalog data and installed configurations, two dimensional references are commonly reported.

• Module Body Dimensions:
  58.5 × 149.9 × 174.6 mm

• Catalog / Packaging Dimensions:
  280 × 80 × 210 mm

• Net Weight:
  1.32 kg

Mounting is typically performed within ABB excitation or control enclosures using standardized mechanical interfaces.

Typical Applications

The 3BHE013940R0002 (UNS0868B-P V2) is primarily deployed in the following scenarios:

• DC power supply for ABB UNITROL excitation systems

• Power source for excitation controllers, regulators, and interface boards

• Stable auxiliary power for PLC and DCS control racks

• Replacement or upgrade power module in ABB excitation cabinets

• Power conditioning for critical control electronics requiring low ripple DC supply

FAQ

Is this module suitable as a replacement for earlier UNS0868B versions?
Yes. Version V2 is designed for backward compatibility in UNITROL and related ABB excitation systems, provided electrical ratings match system requirements.

Can this power supply be used outside excitation systems?
Yes. It can be applied to other ABB-based control systems requiring a regulated 24 VDC supply within the specified current range.

Does the module require external cooling?
Under normal operating conditions within rated temperature limits, external cooling is not mandatory, though adequate cabinet ventilation is recommended.