Description
Product Core Brief
- Model: UAD155A0111 (3BHE029110R0111)
- Brand: ABB
- Series: AC 800PEC
- Core Function: High-performance controller module for the AC 800PEC platform, used in excitation control, process control, and power automation applications.
- Product Type: AC 800PEC Controller Module
- Key Specs: Processor-based real-time control | Configurable I/O mapping | Backplane communication via AC 800PEC rack
- Condition: New Original / New Surplus
Key Technical Specifications
- Part Number: UAD155A0111 / 3BHE029110R0111
- Manufacturer: ABB
- Product Category: AC 800PEC controller module
- System Compatibility: ABB AC 800PEC control system
- Application: Excitation control, generator control, power plant automation, and process control
- Control Capabilities: Real-time digital control with configurable I/O and communication interfaces
- Memory Mapping: Up to 5000 registers for read/write data areas; read and write regions must not overlap
- Communication: Backplane communication with AC 800PEC processor; supports integration with higher-level DCS/SCADA systems
- Protection Features: Over-current, over-voltage, under-voltage, and thermal protection
- Mounting: Eurocard-style plug-in module, AC 800PEC backplane
- Condition: New / New Surplus
- Warranty: Up to 12 months (supplier-dependent)
Product Introduction
The UAD155A0111 is an ABB AC 800PEC controller module designed for demanding power and process automation applications. It is commonly deployed in excitation control systems, generator control, and high-availability process loops where deterministic real-time performance is critical.
As part of the AC 800PEC family, this module provides processor-based control with configurable I/O mapping, backplane communication, and integrated protection functions. It is widely used across power generation, petrochemical, steel, and paper industries — particularly in applications where the AC 800PEC platform serves as the dedicated control layer for excitation, turbine, or boiler protection systems.
For plants running AC 800PEC-based installations, keeping a verified spare on hand is essential. These modules are long-lead items, and a failed controller can halt an entire control rack until a replacement is commissioned.
QA & Testing SOP
AC 800PEC modules carry application-specific firmware and I/O mappings — a marginal unit can disrupt an entire control loop. Here is the bench routine:
- Visual & authenticity inspection. Examine the PCB for corrosion, burned traces, bulging capacitors, or rework marks. Verify the ABB label, part number 3BHE029110R0111, hardware revision, and serial traceability against known OEM formats.
- Power-up test. Apply rated supply voltage via the AC 800PEC backplane and confirm stable boot with no fault LEDs or watchdog trips. The processor should initialize cleanly.
- Backplane communication check. Verify the module establishes proper communication with the AC 800PEC processor. Confirm register read/write operations function within the configured address range (0–4999).
- I/O verification. If the module carries local I/O or field interfaces, inject test signals and verify output response matches expected control logic.
- Protection function check. Validate over-current, over-voltage, and thermal protection flags are readable and functional.
- Anti-static packing. ESD bag with desiccant, rigid foam around connectors — standard practice for any board-level spare.
Installation Pitfalls & Guide
❗ Verify firmware and application configuration. AC 800PEC modules carry application-specific firmware and parameter sets. Swapping in a blank or mismatched module without loading the correct configuration will result in a non-functional controller. Always confirm firmware version and application data before commissioning.
❗ Check backplane connector integrity. Older AC 800PEC racks develop oxidized contacts over time. Bent or corroded pins on the edge connector cause intermittent communication failures that mimic module faults. Inspect both sides before seating.
❗ Confirm register mapping before download. The module supports up to 5000 registers for read/write data areas, and these regions must not overlap. An incorrect mapping can cause data corruption or communication faults with the host processor.
❗ Ground reference consistency. AC 800PEC systems are sensitive to ground potential differences. Ensure the cabinet ground and signal reference are consistent before commissioning to avoid noise-induced control errors.
Replacement steps:
- Pre-install: Back up the existing application configuration and firmware from the host system. Photograph wiring and note slot position.
- Removal: De-energize the rack if hot-swap is not confirmed for your specific AC 800PEC configuration. Label all connections before pulling the module.
- Install: Align the edge connector with the backplane slot and seat firmly. Secure with the front extraction handle latch.
- Power-on test: Energize the rack, confirm no fault LEDs, then download the application configuration and validate communication with the host processor under supervision.
Technical FAQ
Is this an OEM genuine part? Yes. The UAD155A0111 is an ABB-origin AC 800PEC controller module. Units are sourced as new original or new surplus with full part number traceability (3BHE029110R0111).
What is the warranty? Typically 12 months from acceptance, depending on supplier terms. Always confirm warranty conditions before purchase.
Can I use this as a direct replacement? In most cases, yes — provided the full part number matches your existing unit. However, AC 800PEC modules require application-specific firmware and configuration to be loaded from the host system before they become operational.
Is this product still supported by ABB? The AC 800PEC platform remains in active use across many power and process installations. ABB maintains spare parts support, but availability varies by region and lifecycle status. For active service contracts, confirm current support directly with ABB.
Do you offer pricing for bulk or repeat orders? Pricing is quoted per unit and can be adjusted for volume, repeat procurement, or long-term spare parts agreements. Send the part number and quantity for a direct quote.
