Description
Product Description
HONEYWELL 51204172-175 is a high-performance analog input module belonging to Honeywell’s Experion® PKS (Process Knowledge System) and Safety Manager safety instrumented system (SIS) portfolios, engineered for precise measurement and acquisition of analog process signals in critical industrial applications such as oil & gas refining, chemical manufacturing, and power generation. HONEYWELL 51204172-175 features 8 isolated analog input channels supporting universal signal types (4-20mA, 0-10V, thermocouple, RTD), enabling seamless integration with a wide range of field sensors (temperature, pressure, flow). HONEYWELL 51204172-175 is certified to IEC 61508 SIL 2/SIL 3 (depending on configuration) and complies with ATEX/IECEx standards for hazardous environments, ensuring reliable operation in explosive atmospheres. Additionally, HONEYWELL 51204172-175 integrates advanced diagnostic capabilities and hot-swappable installation, minimizing maintenance downtime and enhancing system availability. As a core I/O component of Honeywell’s control and safety systems, HONEYWELL 51204172-175 delivers accurate, real-time data acquisition to support process control and safety interlock logic.
Product Parameters
- Brand/Model: HONEYWELL 51204172-175
- Core Input Parameters
- Number of Channels: 8 isolated analog input channels (1 channel per isolation group)
- Supported Signals: 4-20mA (2/4-wire), 0-10V, thermocouple (J/K/T/E/R/S/B/N), RTD (Pt100/Pt1000/Ni100/Ni1000)
- Resolution: 16-bit (for 4-20mA/0-10V), 0.1°C (for thermocouple/RTD)
- Accuracy: ±0.05% of span (4-20mA/0-10V), ±0.5°C (thermocouple), ±0.2°C (RTD)
- Isolation: Channel-to-channel isolation (1500V AC), module-to-backplane isolation (2500V AC)
- System & Diagnostic Parameters
- Compatible Systems: Honeywell Experion PKS, Safety Manager, FSC (Fault Tolerant Control System)
- Diagnostic Functions: Open/short circuit detection, sensor drift monitoring, overrange/underrange alerts, self-calibration
- Communication Protocol: Honeywell proprietary ControlNet/DeviceNet, Ethernet/IP
- Configuration Software: Honeywell Experion Engineering Environment, Safety Builder
- Environmental & Physical Parameters
- Operating Temperature: -40°C ~ +70°C
- Storage Temperature: -40°C ~ +85°C
- Vibration Resistance: 5g (10-2000Hz, IEC 60068-2-6 standard)
- Shock Resistance: 30g (11ms half-sine wave)
- Power Supply: 24V DC (18-32V) redundant input, power consumption ≤ 12W
- Protection Grade: IP20 (cabinet installation)
- Installation Method: Honeywell standard rack mounting (DIN 35mm rail compatible)
- Dimensions: 140mm × 120mm × 45mm
Advantages & Features
- Universal Signal Compatibility: HONEYWELL 51204172-175 supports all common analog sensor signals (current, voltage, thermocouple, RTD) without requiring hardware modifications, eliminating the need for multiple specialized modules and simplifying system design.
- High Accuracy & Resolution: With 16-bit resolution and ±0.05% span accuracy for 4-20mA/0-10V signals, HONEYWELL 51204172-175 delivers precise measurements critical for process control and safety interlock applications (e.g., high-pressure vessel temperature monitoring).
- SIL Certification & Hazardous Environment Compliance: Certified to IEC 61508 SIL 2/SIL 3 and ATEX/IECEx Zone 2, HONEYWELL 51204172-175 meets the safety requirements of critical industrial processes and can operate in explosive atmospheres (e.g., refinery processing units).
- Advanced Diagnostics & Hot-Swap Support: The module provides real-time alerts for sensor faults (open/short circuits) and drift, enabling predictive maintenance. Hot-swappable design allows module replacement without shutting down the control/safety system, minimizing downtime.
Application Fields & Cases
- Oil Refinery Crude Distillation Unit: A major oil refinery deployed HONEYWELL 51204172-175 modules in its Experion PKS system to monitor temperature, pressure, and flow in crude distillation columns. The module’s universal signal compatibility supported both thermocouple (temperature) and 4-20mA (pressure/flow) sensors, while SIL 3 certification ensured compliance with safety regulations for emergency shutdown logic.
- Chemical Plant Reactor Temperature Control: A petrochemical plant integrated HONEYWELL 51204172-175 into its Safety Manager SIS to monitor reactor jacket temperature via RTD sensors. The module’s ±0.2°C accuracy and drift monitoring detected early-stage sensor degradation, preventing inaccurate temperature readings that could trigger false shutdowns.
- Power Plant Boiler Efficiency Monitoring: A coal-fired power plant used HONEYWELL 51204172-175 to measure boiler flue gas temperature (thermocouple) and feedwater flow (4-20mA), supporting both process control (efficiency optimization) and safety interlock (overtemperature protection) functions. The module’s wide temperature range ensured reliable operation in the boiler’s harsh environment.
Competitor Comparison
| Comparison Dimension | HONEYWELL 51204172-175 | Competitor 1 (Emerson DeltaV AI Module) | Competitor 2 (Siemens S7-400 AI Module) |
|---|---|---|---|
| Number of Channels | 8 | 8 | 8 |
| Signal Compatibility | 4-20mA, 0-10V, thermocouple, RTD | 4-20mA, 0-10V, thermocouple, RTD | 4-20mA, 0-10V, thermocouple, RTD |
| SIL Certification | SIL 2/SIL 3 | SIL 2/SIL 3 | SIL 2 |
| Accuracy (4-20mA) | ±0.05% span | ±0.1% span | ±0.1% span |
| Hazardous Environment Cert | ATEX/IECEx | ATEX/IECEx | Optional |
| Core Advantages | High accuracy, SIL 3 compliance, Honeywell ecosystem integration | Emerson DeltaV native compatibility | Siemens TIA portal integration |
Selection Suggestions & Precautions
- Selection Suggestions: HONEYWELL 51204172-175 is ideal for Honeywell Experion PKS/Safety Manager users requiring high-accuracy analog input with SIL 2/SIL 3 certification (e.g., refineries, chemical plants). For Emerson DeltaV users, Emerson’s AI module is preferred for native integration; Siemens S7-400 AI modules suit Siemens TIA ecosystem users.
- Precautions:
- Configure signal type (e.g., thermocouple vs. 4-20mA) per channel via Honeywell’s configuration software to ensure accurate measurement.
- Use shielded twisted-pair cables for sensor wiring to minimize EMI interference, especially in high-noise industrial environments.
- Perform annual calibration (per Honeywell recommendations) to maintain accuracy and compliance with safety standards.
- Ensure redundant power supplies are connected to independent sources to maximize module availability in critical applications.
- Verify ATEX/IECEx certification matches the hazardous zone classification of the installation site (e.g., Zone 2 vs. Zone 1).
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