SIEMENS 7NG32120NN00 UCN Modem Card, Industrial Control

Product Detailed Description

• Function:

• Measures gauge pressure, absolute pressure, differential pressure, flow (via differential pressure with integral flow calculation), and level.

• Converts the measured pressure into a standardized analog output signal (typically 4-20 mA with HART communication) or a digital output (PROFIBUS PA or FOUNDATION Fieldbus).

• Provides high accuracy and long-term stability for reliable process control.

• Equipped with advanced diagnostic functions for proactive maintenance and fault detection.

• Can be configured and monitored locally via buttons/display or remotely via communication protocols.

• Key Features (Common to DS III / Z series):

• High Measurement Accuracy: Typically offers high linearity and low hysteresis for precise readings.

• Wide Measuring Range: Available in various pressure ranges to suit diverse application needs.

• Robust Design: Constructed from high-quality materials (e.g., stainless steel, Hastelloy) to withstand harsh industrial environments, including corrosive media, high temperatures, and vibrations.

• Versatile Process Connections: Available with various standard process connections (e.g., flanged, threaded, hygienic) to fit different installation requirements.

• Communication Protocols: Supports HART (Highway Addressable Remote Transducer) for analog 4-20 mA models, enabling digital communication over the same two wires for configuration and diagnostics. Many variants also support digital fieldbus protocols like PROFIBUS PA or FOUNDATION Fieldbus.

• Integrated Display (Optional): Some models feature a local display for on-site reading of measured values and basic configuration.

• Advanced Diagnostics: Offers extensive diagnostic capabilities (e.g., self-monitoring, wire break detection, sensor fault detection) to enhance plant availability and reduce downtime.

• Explosion Protection: Available with various international explosion protection certifications (e.g., ATEX, FM, IECEx) for use in hazardous areas.

• Long-Term Stability: Designed for minimal drift over time, reducing the need for frequent recalibration.

Product Parameters (General, based on SITRANS P DS III / Z series)

• Measuring Principle: Piezoresistive sensor with fill fluid.

• Measured Variable: Gauge pressure, absolute pressure, differential pressure.

• Measuring Range: Varies widely by specific model and range selected (e.g., from 1 mbar up to 700 bar, or specific ranges like 0-100 mbar, 0-10 bar, 0-100 bar, etc.).

• Output Signal:

• 4-20 mA with HART protocol (standard).

• PROFIBUS PA.

• FOUNDATION Fieldbus.

• Accuracy: Typically between 0.075% and 0.1% of span, sometimes even better for specific ranges.

• Reference Condition Accuracy: ≤ 0.075 %

• Supply Voltage:

• 10.5 V DC to 45 V DC for HART.

• Specific voltage ranges for fieldbus versions.

• Process Temperature: Varies significantly depending on the process connection and diaphragm seal, but generally ranges from -40 °C to +100 °C, with options for up to +400 °C with remote seals.

• Ambient Temperature: -40 °C to +85 °C (-40 °F to +185 °F).

• Degree of Protection: IP65 / IP66 / IP67 / NEMA 4X.

• Process Connection: Various options like 1/2" NPT, 1/4" NPT, G1/2", flanges (DN, ANSI), hygienic connections.

• Housing Material: Die-cast aluminum or stainless steel.

• Wetted Parts Material: Stainless steel, Hastelloy C276, Monel, Tantalum, Gold (depending on application).

• Certifications: CE, ATEX, FM, CSA, IECEx, SIL 2/3 (Safety Integrity Level) for functional safety applications.

Product Advantages

• High Precision: Delivers highly accurate and reliable measurements crucial for optimal process control and quality assurance.

• Robustness and Durability: Designed for extreme conditions, ensuring long operational life and reduced replacement costs.

• Versatility: Suitable for a wide array of measurement tasks (pressure, level, flow) across various media and temperatures.

• Advanced Diagnostics: Enhances plant safety and availability by providing early warnings of potential issues, facilitating predictive maintenance.

• Seamless Integration: HART, PROFIBUS PA, and FOUNDATION Fieldbus options allow for easy integration into existing and new control systems.

• Functional Safety (SIL): Many variants are certified for use in safety-instrumented systems (SIS) up to SIL 2/3, meeting stringent safety requirements.

• Reduced Maintenance: High long-term stability and robust design minimize calibration frequency and maintenance efforts.

Precautions

• Correct Selection: Choose the exact model, pressure range, process connection, wetted parts material, and communication protocol that precisely match the application's specific requirements (process medium, temperature, pressure, hazardous area classification).

• Proper Installation: Follow the Siemens installation manual meticulously. Ensure proper mounting, orientation, and tightness of process connections. Incorrect installation can lead to measurement errors or damage.

• Electrical Connections: Ensure correct wiring, power supply voltage, and grounding. Adhere to local electrical codes and hazardous area installation requirements if applicable.

• Pressure Overload: Avoid exceeding the specified maximum overpressure limit, as this can damage the sensor. Use appropriate overpressure protection if necessary.

• Media Compatibility: Verify that the wetted parts material is compatible with the process medium to prevent corrosion and premature failure.

• Calibration: While stable, periodic calibration may be required based on industry standards, company policy, or specific application accuracy demands.

• Environmental Conditions: Ensure the ambient operating temperature and humidity are within the specified limits. Protect the transmitter from excessive vibration or physical impact.

• Hazardous Area Considerations: If installing in hazardous areas, strictly adhere to the specific instructions and requirements of the explosion protection certification (e.g., intrinsically safe barrier requirements, flameproof enclosure sealing).

Product Applications

Siemens SITRANS P pressure transmitters are widely employed in various industries for critical measurement and control tasks:

• Oil & Gas: Pressure and level measurement in pipelines, refineries, storage tanks, and offshore platforms.

• Chemical and Petrochemical: Monitoring and controlling pressure, differential pressure, and level in reactors, distillation columns, and storage vessels.

• Power Generation: Pressure measurement in boilers, steam lines, cooling systems, and water treatment plants.

• Water & Wastewater Treatment: Level and pressure monitoring in tanks, reservoirs, pumps, and filtration systems.

• Pharmaceutical and Biotech: Pressure and level control in bioreactors, fermenters, and purification systems (often using hygienic connections).

• Food & Beverage: Pressure and level measurement in mixing tanks, pasteurizers, and filling lines, especially with hygienic designs.

• Pulp & Paper: Pressure and level control in digesters, paper machines, and chemical recovery units.

• Metals & Mining: Pressure monitoring in hydraulic systems, furnaces, and ventilation systems.

• HVAC: Pressure measurement in chillers, boilers, and air handling units.

Shipping Port: Xiamen, China

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