The Honeywell 51204170-175 is a high-level analog input (HLAI) module designed for integration with Honeywell’s Universal Control Network (UCN) architecture, commonly used in distributed control systems (DCS) such as TDC 3000 and Experion PKS. It serves as a critical interface for converting high-level analog signals (e.g., 4–20 mA, 0–10 V) from field devices (e.g., pressure transmitters, temperature sensors) into digital data for real-time monitoring and control. Engineered for safety-critical applications, the module features a Fail-Typically-Active (FTA) design, ensuring outputs default to a safe state (e.g., predefined value) during faults, aligning with IEC 61508 SIL 2 requirements
While specific datasheet details for the 51204170-175 are not explicitly listed in public sources, it shares architectural similarities with other Honeywell UCN HLAI modules (e.g., 51204170-125, 51204170-150), suggesting it supports high-resolution signal conditioning, galvanic isolation, and modular integration. The suffix -175 likely denotes specific voltage or environmental ratings, such as a 175V DC input capability or extended temperature range
Signal Processing:
- 8-channel analog input with support for high-level signals (4–20 mA, 0–10 V) and low-level signals (±50 mV) via external signal conditioners.
- High resolution: 16-bit ADC with ±0.1% accuracy for precise measurement in process control loops.
- Signal conditioning: Built-in cold-junction compensation for thermocouple inputs and programmable filter settings (0–100 ms) to reduce noise.
Safety & Reliability:
- FTA design: Ensures outputs fail to a safe state during module malfunctions, enhancing process integrity in industries like oil & gas and power generation.
- 2.5 kV galvanic isolation: Protects against electrical noise and transient voltage spikes from high-voltage equipment.
- IP65 environmental protection: Dust-tight and water-resistant housing for operation in harsh industrial environments.
Communication:
- UCN network integration: Communicates with Honeywell controllers (e.g., C200, C300) via UCN at 1 Mbps for seamless integration into existing DCS setups.
- Diagnostic ports: RS-232/RS-485 interface for troubleshooting via Honeywell Engineering Workstation software.
Configuration:
- Programmable via Honeywell Engineering Workstation: Supports channel-level parameterization (e.g., signal scaling, fail-safe mode) and real-time status monitoring.
- LED indicators: Provide visual feedback for power, fault status, and channel activity.
| Parameter | Description |
|---|
| Input Channels | 8 high-level analog inputs (4–20 mA, 0–10 V) |
| Input Accuracy | ±0.1% of full scale (25°C) |
| Resolution | 16-bit ADC |
| Signal Conditioning | Cold-junction compensation for thermocouples; programmable filter (0–100 ms) |
| Communication | UCN (1 Mbps); RS-232/RS-485 diagnostic port |
| Power Supply | 24 VDC ±10% (1.5 A max), redundant inputs supported |
| Operating Temperature | -40°C to +70°C (operation); -40°C to +85°C (storage) |
| Certifications | CE, UL, CSA, IEC 61508 SIL 2, ATEX (Ex II 2G Ex d IIC T6) (estimated) |
| Physical Dimensions | 120 mm × 80 mm × 30 mm (rack-mounted) |
| Weight | 0.4 kg (0.88 lbs) |
Modular Architecture:
- Rack-mounted in Honeywell UCN I/O chassis, supporting up to 8 modules per rack for scalable I/O expansion.
- Hot-swappable: Allows module replacement without system shutdown, minimizing maintenance downtime.
Redundancy & Fault Tolerance:
- Optional dual power supplies for fail-safe operation in mission-critical applications.
- Built-in self-test (BIST) with diagnostic alerts for open circuits, short circuits, or signal drift.
Industrial Compliance:
- Designed for shock (50 G peak) and vibration (2.5 G RMS) resistance, compliant with IEC 60068-2 standards.
- Extended temperature range (-40°C to +70°C) for extreme industrial environments.
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