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ABB 3BDH000741R1
ABB 3BDH000741R1 is an ABB Symphony Plus (S+) / DCS I/O module, model CTI 21-P Ex, designed for temperature signal acquisition in hazardous (Ex) areas. It provides intrinsically safe, isolated inputs for industrial process measurement applications.
Product Overview
- Manufacturer: ABB
- Part Number: 3BDH000741R1
- Model: CTI 21-P Ex
- Product Type: Temperature Input Module / Ex-rated I/O module
- System Family: ABB Symphony Plus (S+) Distributed Control System
- Application: Hazardous-area temperature monitoring and process control
Technical Specifications
| Parameter |
Description |
| Input Channels |
16 / 32 configurable inputs |
| Input Types |
Thermocouples, Pt100/Ni100 RTD, mV, voltage, resistance signals |
| Isolation |
Galvanic isolation per channel |
| Hazardous Area Certification |
ATEX certified |
| Ex Protection |
II (2) G [Ex ib IIC Gb] |
| Standards |
EN 60079-0, EN 60079-11 |
| Software Version |
Version 1.31 or later |
| Required Accessories |
CI 120 / CI 121 Ex cable clamp accessories |
Key Features
- Intrinsic safety design: Suitable for applications where field devices are installed in potentially explosive atmospheres.
- Multi-sensor compatibility: Supports common temperature sensors such as thermocouples and resistance temperature detectors (RTDs).
- Channel isolation: Helps prevent interference and improves measurement reliability.
- Flexible configuration: Can handle different analog temperature measurement requirements within a single module.
Application Areas
ABB CTI 21-P Ex modules are commonly used in:
- Oil & gas processing facilities
- Petrochemical plants
- Power generation systems
- Chemical production
- Process industries requiring hazardous-area instrumentation
Typical applications include:
- Reactor temperature monitoring
- Furnace and boiler temperature measurement
- Pipeline and storage temperature monitoring
- Safety-critical process control loops
Conclusion
The ABB 3BDH000741R1 CTI 21-P Ex is a reliable temperature input module for ABB Symphony Plus DCS installations, combining multi-channel temperature measurement capability with ATEX-certified intrinsic safety. It is designed for demanding industrial environments where accurate and safe temperature monitoring is required.