Description:The Rosemount 2051CG4A02A1AH2B2M5D4 is a high-performance, coplanar gauge pressure transmitter from Emerson (Rosemount). It is not a standalone “processor module” in the PLC sense, but rather a complete pressure transmitter whose “processor” is the integral electronics module (often called the “head” or “electronics capsule”) that conditions the sensor signal. This specific model features a 4-20 mA HART output, an integral LCD display with local pushbuttons, and a 0-4000 psi (275 bar) range. It is designed for precise pressure measurement in demanding process applications such as chemical processing, power generation, and oil & gas.Application Scenarios:In a太原-based chemical plant, a reactor vessel requires reliable pressure monitoring to ensure safe operation. The 2051CG4A02A1AH2B2M5D4 is installed on a coplanar flange. Its 4-20 mA signal feeds directly into the plant’s DCS for control, while the local LCD display allows operators to verify pressure at a glance during rounds. Maintenance engineers use a HART communicator (or the local buttons) to perform zero checks and range adjustments without opening the control cabinet.
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 2051CG4A02A1AH2B2M5D4 |
| Manufacturer | Emerson / Rosemount |
| Product Category | Coplanar Gauge Pressure Transmitter |
| Measurement Type | Gauge Pressure (Reference: Atmospheric) |
| Output Signal | 4-20 mA DC with HART Protocol |
| Communication | HART (FSK superimposed on 4-20 mA) |
| Display & Interface | LCD Indicator (M5) + Local Zero/Span Buttons (D4) |
| Process Connection | Coplanar Flange (1/2-14 NPT internal thread) |
| Wetted Parts | 316L Stainless Steel (Membrane, Flange) |
| Fill Fluid | Silicone Oil |
| Reference Accuracy | ±0.075% of Span (Typical for 2051C series) |
| Supply Voltage | 10.5 – 55 V DC (Loop Powered) |
| Operating Temp. | -40°C to 85°C (Process & Ambient) |
| Protection Rating | IP67 (NEMA 4X) Aluminum Housing |
Technical Principles and Innovative Values:
- Innovation Point 1: Coplanar Platform Design. Unlike traditional transmitters with protruding sensor housings, the 2051C series uses a coplanar flange where the sensing diaphragm is flush with the mounting flange. This design eliminates cavities where process media could collect, reducing the risk of clogging and simplifying cleaning. This is critical for viscous fluids or services requiring CIP (Clean-in-Place) in太原’s food & beverage or pharmaceutical industries.
- Innovation Point 2: Advanced Sensor Technology. The “processor” (signal conditioning electronics) leverages Rosemount’s proprietary silicon sensor technology, known for its high stability and minimal drift (±0.125% URL per 5 years). The electronics provide advanced diagnostics, temperature compensation, and a wide turndown ratio (100:1), allowing one transmitter to cover a broad range of pressures without hardware changes.
- Innovation Point 3: Local Intelligence & Configuration. The inclusion of the LCD display (M5) and local pushbuttons (D4) is a significant usability innovation. It allows operators to view process variables, perform zero adjustments, and even reconfigure basic settings without needing a separate HART handheld or software, reducing downtime for simple calibrations.
