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Phone：+86 17062388866Description
The ABB PFEA112-20 3BSE050091R20 is a high-precision Resistance Board designed for ABB’s S800 I/O system, serving as a critical interface for temperature sensors in process automation. This module enables direct connection of 2/3/4-wire RTDs (Resistance Temperature Detectors) and thermocouples to ABB’s AC 800M controllers, ensuring accurate signal conditioning for critical thermal monitoring. As part of ABB’s Advant OCS and Symphony® Plus DCS platforms, the PFEA112-20 features galvanic isolation (500 VAC) between channels and the control system, eliminating ground loops in electrically noisy environments like steel mills or power plants. Its DIN-rail mountable design supports hot swapping, minimizing downtime during maintenance. With built-in lead resistance compensation and open-wire detection, the ABB PFEA112-20 3BSE050091R20 delivers ±0.1°C stability for SIL 2 safety applications, including reactor temperature monitoring and turbine protection systems.
ABB PFEA112-20 3BSE050091R20
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | PFEA112-20 3BSE050091R20 |
| Manufacturer | ABB |
| Product Type | RTD/Thermocouple Termination Board |
| Compatible I/O Module | S800 AI (e.g., TB831 3BSE013220R1) |
| Input Types | RTD (Pt100/Ni120/Cu10), TC (J/K/T/E/R/S) |
| Channels | Configurable per carrier (up to 16) |
| Isolation Voltage | 500 VAC (Field-to-System) |
| Lead Resistance Compensation | Yes (3/4-wire RTD) |
| Accuracy | ±0.1°C (Pt100), ±0.5°C (Type K TC) |
| Operating Temperature | -25°C to +70°C |
| Connection | Spring-clamp terminals (0.2–2.5 mm²) |
| Certifications | CE, UL, IEC 61010, SIL 2 |
| Mounting | DIN EN 50022 |
| EMC Immunity | EN 61326 (25 kV ESD, 10 V/m RF) |
Main Features and Advantages
Sensor optimization: Automatic cold-junction compensation (CJC) for thermocouples and programmable excitation currents (0.5/1 mA) for RTDs ensure laboratory-grade accuracy. The PFEA112-20’s drift-free design maintains calibration for 100,000+ hours in fluctuating ambient temperatures.
Diagnostic intelligence: Real-time detection of sensor breakage, short-circuit, and out-of-range signals triggers prioritized alarms in ABB’s 800xA DCS. Configurable filtering (1–32 samples) suppresses noise from VFDs without compromising response time (<100>
Lifecycle efficiency: Color-coded terminal blocks prevent wiring errors during commissioning. The board’s corrosion-resistant gold-plated contacts and conformal coating (IPC-CC-830B) withstand H₂S-rich atmospheres in refineries. Tool-less replacement reduces mean repair time (MTTR) to under 5 minutes.
Application Field
The ABB PFEA112-20 3BSE050091R20 excels in precision temperature monitoring:
Power Generation: Boiler tube metal temperature (BMT) monitoring in coal/gas plants (up to 64 points per carrier).
Chemical Processing: Exotherm control in batch reactors with Type J thermocouples.
Pharmaceutical: Sterilization-in-place (SIP) system validation with Pt100 probes.
Metals: Continuous casting mold temperature profiling via 4-wire RTDs.
In pulp mills, it survives 95% humidity while measuring digester temperatures.
ABB PFEA112-20 3BSE050091R20
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