Product Details
The ABB 3BHE013940R0002, also cataloged as the UNS0868B-P,V2 Power Supply Module, operates as a dedicated hardware component for internal bus voltage regulation and board-level power distribution within UNITROL and MEGATROL excitation controller platforms. The module converts incoming distribution voltages into regulated DC voltage rails, supplying low-ripple power directly to processor submodules, rack backplanes, and peripheral gate-drive interfaces.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3BHE013940R0002 (UNS0868B-P,V2) |
| Brand | ABB |
| Origin | Sweden |
| Weight | 1.32 kg |
| Dimensions | 37.6 cm x 14.0 cm x 7.5 cm |
| Operating Temp | 0 to +55 deg C |
| Power Consumption | 120 W nominal output load capability |
| Product Type | Power Supply Modules |
| System Platform | ABB UNITROL / MEGATROL |
| Customs Tariff Code | 85044090 |
Backplane Bus Power Integration & Firmware Compatibility
The UNS0868B-P,V2 power supply module maintains high backplane bus power stability through active voltage regulation and over-current isolation. It supports internal communication monitoring and voltage sensing circuits that report operational health directly to the master controller rack. Integrated firmware flash compatibility across revision V2 ensures seamless system handshaking, deterministic power-up sequencing, and immunity to transient bus voltage dips during heavy industrial switching operations.
Frequently Asked Questions
Q: What is the primary function of the UNS0868B-P,V2 module in an ABB excitation rack?
A: It provides regulated internal DC logic voltages to system backplanes and processing boards, isolating sensitive electronics from supply voltage transients.
Q: Can the UNS0868B-P,V2 power supply module be replaced while the controller is live?
A: No, system input power must be completely isolated and de-energized prior to removing or installing the power supply module to prevent electrical arc flash or hardware damage.
Q: How is thermal dissipation managed within the module chassis?
A: The module relies on integrated aluminum heatsinks designed for natural convection cooling inside standard ABB cabinet assemblies.
Field Installation Guidelines
- Isolate all AC and DC incoming power sources before opening the cabinet or attempting module insertion.
- Maintain a minimum vertical clearance of 100 mm above and below the module cage to allow unobstructed natural convection airflow.
- Slide the module evenly into its designated rack slot to avoid misaligning the rear high-current connector pins.
- Torque all front panel mounting bolts to specified panel standards to secure structural grounding to the sub-rack frame.
- Ensure cabinet earth bonding connections exhibit a resistance of less than 1 ohm to mitigate high-frequency electrical noise.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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