ABB 3BHE021951R0124 – PLC Module for Chemical Industry

ABB 3BHE021951R0124 is a high-performance, chemistry-grade control/analog I/O module designed for ABB Advant-800xA / S800 I/O and Symphony Plus DCS platforms, built for continuous process control, corrosive atmospheres, and 24/7 critical operations in chemical, petrochemical, and refining plants.

1. Overview

• Part No: 3BHE021951R0124
• Model: KV C758 A124 (IPS dual-channel module)
• Type: Analog Input/Output & Process Control Module
• Target Sector: Chemical, petrochemical, oil & gas, pharmaceuticals
• Core Role: Precision signal acquisition, loop control, valve/pump interlocking, and plant-wide data exchange for reactors, distillation columns, and hazardous area monitoring.

2. Key Features (Chemical Industry Focus)

• ✅ High-Precision Analog Processing
  • 16-bit resolution, ±0.1% accuracy
  • Signals: 4–20 mA / 0–10 V (sensors, transmitters, control valves)
  • Dual-channel design for redundant or parallel signal handling
• ✅ Harsh Environment Reliability
  • Extended temp: -40°C to +70°C
  • Humidity: 5–95% non-condensing; resistant to corrosive vapors
  • EMC: IEC 61000-4; high noise immunity for motor/VFD-rich areas
• ✅ Safety & Redundancy
  • Redundant 24 VDC power (18–30 VDC)
  • Hot-swappable; no shutdown for replacement
  • Overvoltage/overcurrent/thermal protection; SIL-capable for critical interlocks
• ✅ Seamless Integration
  • Protocols: Profibus DP, Modbus TCP/RTU, OPC UA
  • Compatibility: ABB Advant-800xA, S800 I/O, Symphony Plus DCS
  • Real-time data for MES/ERP and hazardous area management

3. Chemical Industry Applications

• Reactor Control: Precise temperature/pressure/feed regulation; batch & continuous processes
• Distillation & Separation: Level, flow, and composition monitoring; valve sequencing
• Hazardous Zones: Classified Ex areas, corrosive environments, dust/chemical vapor
• Utilities: Boiler, cooling water, and waste treatment control
• Asset Monitoring: Pump/compressor vibration, temperature, and pressure tracking

4. Technical Specifications (Summary)

• Power: 24 VDC ±20%; redundant; ≤15 W
• I/O: Dual-channel analog (4–20 mA / 0–10 V); 16-bit resolution
• Communication: Profibus DP, Modbus TCP/RTU, OPC UA
• Temperature: -40°C to +70°C
• Mounting: DIN rail / ABB standard rack; plug-in design
• Weight: ~0.3 kg

5. Benefits for Chemical Plants

• Stable Production: High precision and fast response reduce reaction variability
• Max Uptime: Hot-swap and redundancy support 24/7 operations
• Corrosion Resistant: Withstands chemical vapors and moisture
• Easy Integration: Works with existing ABB DCS/SCADA systems
• Safer Operations: Robust protection and SIL-capable interlocks reduce risk