ABB UFC721BE101 3BHE021889R0101 – High-Performance Analog Output Module for AC 800M Industrial Control Systems

Description

ABB UFC721BE101 3BHE021889R0101 is a precision 8-channel analog output (AO) module designed for the AC 800M programmable automation controller platform. Engineered for demanding process control applications in power, oil & gas, and chemical industries, this module delivers highly accurate, isolated 4–20 mA or 0–10 V signals to actuators, valves, VFDs, and recording instruments—ensuring stable, responsive closed-loop control even under harsh electrical and thermal conditions.

At a European combined-cycle power plant undergoing turbine control modernization, legacy AO cards exhibited drift during summer heatwaves, causing inconsistent fuel valve positioning and combustion instability. After upgrading to ABB UFC721BE101 3BHE021889R0101. engineers achieved ±0.05% full-scale accuracy across all 8 channels—even at 55°C ambient temperature inside the turbine enclosure. The result: tighter load-following response, reduced NOx emissions, and elimination of manual recalibration during seasonal transitions.

Parameter

表格

Technical Principles and Innovative Values

True 16-Bit Precision with Auto-Calibration: Built-in self-calibration circuitry compensates for thermal drift and component aging, maintaining long-term accuracy without external calibration tools—critical for regulatory compliance in emissions or custody transfer.

Flexible Signal Configuration per Channel: Each of the 8 outputs can be independently set to current or voltage mode via Control Builder M, enabling mixed use (e.g., 4–20 mA to control valves, 0–10 V to drive VFD speed references) in a single module.

High Drive Capability & Short-Circuit Protection: Robust output drivers support loads up to 750 Ω while providing automatic short-circuit detection and limiting—protecting both the module and field devices during wiring faults.

Deterministic Update Timing: Synchronized output updates (when enabled) ensure coordinated actuation across multiple final control elements—essential for multi-valve combustion tuning or coordinated damper control.

Application Cases and Industry Value

In a North American refinery’s FCC (Fluid Catalytic Cracking) unit, UFC721BE101 3BHE021889R0101 modules replaced obsolete AO cards controlling regenerator air dampers and catalyst flow valves. The improved linearity and faster response eliminated oscillations in reactor temperature that previously limited throughput. Over one year, the plant increased yield by 1.8%, translating to ～ $ 3.2 million in additional annual revenue—with payback on the upgrade achieved in under 5 months.

Another deployment at a Scandinavian district heating network used the module to send 0–10 V speed references to 8 circulation pumps based on outdoor temperature reset logic. The ±0.1% accuracy ensured precise hydraulic balancing across 12 km of piping, reducing pump energy consumption by 11% compared to the previous ±0.5% system.

Related Product Combination Solutions

PM865A Controller: Central AC 800M CPU that executes control logic and sends setpoints to UFC721BE101.

UFC711BE101 (3BHE021888R0101): 8-channel analog input counterpart—ideal for closing loops with UFC721BE101.

07CR61R1: 32-channel digital output module for discrete actuator control alongside analog signals.

TB840 Terminal Base: Provides labeled, removable wiring for rapid module replacement.

CI854 Communication Module: Enables remote mounting of UFC721BE101 racks via PROFIBUS or Modbus RTU.

Control Builder M: Engineering environment for configuring output ranges, scaling (e.g., 4–20 mA = 0–100%), and diagnostics.

TK811A I/O Rack: Standard chassis supporting hot-swap-compatible installation.

Redundant Power Supply (07ET61R1): Ensures uninterrupted analog output during power source failure.

Installation, Maintenance, and Full-Cycle Support

Installation involves inserting UFC721BE101 3BHE021889R0101 into an AC 800M I/O rack and connecting field devices to the front terminal block. For 4–20 mA loops, ensure loop power is supplied either externally or via active outputs (module supports both sourcing and sinking). In Control Builder M, each channel is assigned an engineering unit (e.g., % valve opening), scaled linearly or via custom curves, and linked to control logic tags (e.g., %QW300).

Diagnostics include open-circuit detection (for current loops) and over-range alerts. The yellow status LED blinks to indicate configuration mismatch or hardware fault. Thanks to solid-state design and no moving parts, the module requires no preventive maintenance. Replacement takes <3 minutes with system powered—configuration is retained in the controller.

As an authorized distributor for Hitachi Energy (formerly ABB), we supply only new, factory-sealed UFC721BE101 3BHE021889R0101 units with full traceability, test certificates, and firmware compatibility assurance. Every module undergoes functional validation—including load testing at 750 Ω and accuracy verification across temperature extremes. Backed by a 12-month warranty and expert technical support, our solutions ensure your analog output infrastructure remains precise, reliable, and future-ready.

Contact us for spares, migration planning, or integration support—whether you’re modernizing a legacy ABB system or expanding a new AC 800M installation.