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Product Overview
The 51201475-250 is a high-level analog current input module engineered for Honeywell distributed control systems. It interfaces directly with field-mounted transmitters, accepting standardized current loop signals and translating them into stable, high-resolution digital data for control and monitoring functions.
Designed for long-term deployment in industrial environments, this module is commonly installed within Honeywell I/O racks as part of TDC 3000, TPS, or Experion PKS architectures.
Functional Description
The 51201475-250 module receives analog current signals—typically in the 4–20 mA range—from process instrumentation such as pressure, temperature, flow, and level transmitters. Internal signal conditioning and analog-to-digital conversion ensure that incoming measurements are accurately represented within the DCS controller for real-time process control, alarming, and historical trending.
The module is optimized for continuous operation and supports deterministic signal acquisition required in critical process applications.
Technical Specifications
- Signal Input Type: High-level analog current
- Nominal Input Range: 4–20 mA current loop
- Signal Resolution: High-precision ADC for stable measurement accuracy
- Input Isolation: Channel-to-system isolation for noise immunity
- System Compatibility: Honeywell TDC 3000, TPS, Experion PKS
- Installation Method: Rack-mounted I/O module
- Operating Temperature: -20 °C to +70 °C
- Power Consumption: Low power dissipation suitable for dense I/O racks
- Module Form Factor: Compact industrial-grade PCB assembly
- Weight: 0.3 kg
Key Technical Advantages
- Accurate current signal acquisition with minimal drift over time
- Robust electrical design for electrically noisy plant environments
- Native compatibility with both legacy and modern Honeywell DCS platforms
- Modular design allows fast replacement without extended system downtime
- Suitable for continuous 24/7 operation in safety-critical processes
Typical Applications
The 51201475-250 is widely used in process industries where reliable analog signal acquisition is required, including oil and gas production, chemical processing, power generation, and large-scale manufacturing facilities. It serves as the interface between field transmitters and the Honeywell control system, enabling precise measurement, closed-loop control, and process optimization.
Compatibility and System Integration
This module integrates directly into Honeywell I/O subsystems without the need for external signal conditioners. Configuration and diagnostics are handled through the host DCS engineering tools, ensuring consistent behavior across system expansions or upgrades.
Frequently Asked Questions
Q: What signal types does this module support?
A: It is designed specifically for high-level analog current inputs, primarily 4–20 mA current loops.
Q: Can this module be used in Experion PKS systems?
A: Yes, the 51201475-250 is compatible with Honeywell Experion PKS as well as TDC 3000 and TPS systems.
Q: Is refurbished hardware available?
A: The module is commonly available in both new and professionally refurbished conditions, typically with functional testing and warranty options.
