Email: sales@runshengdcs.com
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Phone：+86 15383419322Description
The ABB 3BHE024855R0101 UFC921A101 is a high-performance PROFIBUS DP communication interface module designed for ABB’s AC 800M controller series, enabling seamless integration of industrial automation systems with field devices. This ruggedized module facilitates deterministic data exchange between ABB’s 800xA DCS and PROFIBUS-compatible sensors, actuators, and drives. The UFC921A101 supports baud rates up to 12 Mbps with dual redundant ports for daisy-chain topologies, featuring galvanic isolation (1500 V AC) to prevent ground loops in electrically noisy environments. Certified for SIL 2 applications (IEC 61508), it ensures reliable communication in critical processes like power generation and chemical manufacturing. Its hot-swappable design minimizes downtime during maintenance or upgrades.
ABB 3BHE024855R0101 UFC921A101
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | ABB 3BHE024855R0101 UFC921A101 |
| Manufacturer | ABB |
| Product Type | PROFIBUS DP Communication Module |
| Protocol | PROFIBUS DP-V1 (IEC 61158/61784) |
| Data Rate | 9.6 kbps – 12 Mbps (auto-negotiating) |
| Isolation | 1500 V AC (field-to-logic) |
| Ports | 2x redundant RS-485 (9-pin D-Sub) |
| Address Range | 0–126 (software configurable) |
| Diagnostics | LED status (RUN, COM, ERROR) |
| Power Consumption | 5 V DC / 450 mA (via backplane) |
| Operating Temperature | -25°C to +70°C |
| Certifications | CE, UL, IEC 61508 SIL 2 |
| Dimensions | 128 × 110 × 85 mm (H×W×D) |
| MTBF | >300,000 hours (IEC 61709) |
Main Features and Advantages
Deterministic Performance:
Supports PROFIBUS DP-V1 with 1 ms cycle time for 128 I/O points, enabling real-time control synchronization. Dual-port redundancy enables ring topologies with <1 ms switchover during cable faults.
Robust Connectivity:
Integrated surge protection (IEC 61000-4-5) and galvanic isolation withstand 2 kV ESD events. Auto-baud detection simplifies commissioning, while configurable GSD files support 200+ vendor devices.
Advanced Diagnostics:
Real-time monitoring of telegram error rates, station status, and signal quality. Event logging integrates with ABB’s Control Builder M for root-cause analysis. Front LEDs provide instant visual status:
Green RUN: Module operational
Yellow COM: Data exchange active
Red ERROR: Configuration fault or bus failure
Cybersecurity Compliance:
Supports VPN tunneling and MAC address filtering. Firmware signed with SHA-256 encryption to prevent unauthorized modifications.
Application Field
The UFC921A101 enables critical industrial communication:
Power Plants: Integrates turbine governors (Siemens S7 PLCs) with 800xA DCS for SIL 2 boiler protection
Chemical Processing: Connects Coriolis flow meters (Endress+Hauser) to batch reactor control systems
Water Treatment: Interfaces pump variable frequency drives (Danfoss VFDs) for distributed control
Pharmaceutical: Links CIP (clean-in-place) valve manifolds (Festo) to MES for 21 CFR Part 11 compliance
Minerals Processing: Synchronizes conveyor drive controllers across multi-kilometer sites
Related Products
ABB CI871 3BSE056767R1: PROFIBUS interface for legacy S800 I/O
ABB TU810 3BHE024855R0102: Termination unit for UFC921A101
ABB PM865 3BSE050198R1: AC 800M controller hosting UFC modules
ABB SD822 3BSE018172R1: Surge protector for field cabling
ABB COM3 3BSE069297R1: PROFIBUS configurator software
ABB CP635-T 1TGE120010R1300: HMI for local PROFIBUS diagnostics
ABB 3BHE024855R0101 UFC921A101
Installation and Maintenance
Pre-installation preparation: Verify controller compatibility (PM865/PM866). Configure station address via Control Builder M before mounting. Use shielded PROFIBUS cable (Type A) with continuous braiding. Ground shield at single point only.
Maintenance recommendations: Monitor “COMM FAULT” LEDs monthly. Clean D-Sub contacts annually with electronic-grade contact cleaner. Check signal reflections via oscilloscope if error rate >10⁻⁶. Update GSD files quarterly for new devices.
