SIEMENS 7NG4142-8AA Pressure Transmitter

Description

SIEMENS 7NG4142-8AA Pressure Transmitter

Product Dimensions：

The Siemens 7NG4142-8AA is a member of the SITRANS TH300 series. It is a smart, universal temperature transmitter designed for mounting in a Connection Head (Form B). Unlike basic transmitters, the TH300 features HART communication, allowing for extensive diagnostics and remote configuration.

1. Product Description

The SITRANS TH300 (7NG4142-8AA) acts as a bridge between temperature sensors (RTDs or Thermocouples) and the control system. It converts the sensor signal into a stable, noise-immune 4 to 20 mA current signal.

• Communication: HART 7 protocol.

• Mounting: Designed for Head Mounting (Type B).

• Galvanic Isolation: High electrical isolation between input and output to ensure signal integrity and safety.

2. Technical Parameters

3. Product Advantages

• Universal Compatibility: One device can handle almost all common sensor types, reducing your spare parts inventory.

• HART Functional Diversity: Supports remote parameterization via SIMATIC PDM or handheld communicators.

• High Reliability: Features sensor burnout and short-circuit monitoring, ensuring the system fails safely in case of hardware issues.

• High Accuracy: Excellent long-term stability and minimal temperature drift.

• Compact Design: Fits into even the smallest Type B connection heads.

4. Key Applications

This transmitter is widely used in industries requiring high precision and remote monitoring:

• Chemical and Petrochemical: Monitoring reactor temperatures.

• Power Plants: Steam and exhaust gas temperature measurement.

• Food and Beverage: Temperature control in pasteurization or storage.

• Water and Wastewater: Monitoring process temperatures in treatment plants.

5. Important Considerations (Precautions)

• Explosion Protection: Ensure the specific sub-model matches the zone requirements (e.g., ATEX/IECEx if used in hazardous areas).

• Wiring: Always follow the polarity markings for the 4-20 mA loop to avoid damage.

• Configuration: While it can be used with default settings, specialized calibration via HART is recommended to match the specific sensor curve (Callendar-Van Dusen coefficients) for maximum accuracy.

• Environment: If installed outdoors, ensure the Connection Head has an appropriate IP rating (e.g., IP65 or higher) to protect the transmitter from moisture.

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Shipping Port: Xiamen, China

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