Product Short Description
Product Name: Emerson Ovation RTD Temperature Input Module
Product Brief: Specialized temperature acquisition module for Ovation DCS system, designed to receive signals from Resistance Temperature Detector (RTD), realizes high-precision temperature measurement in industrial sites.
Description
- Input Channel Quantity: 8 RTD input channels
- Supported RTD Types: Pt100, Pt1000, Cu50 standard thermal resistors
- Wiring Mode: 2-wire / 3-wire / 4-wire connection configurable
- Measuring Range: -200 °C ~ +850 °C (depends on RTD type)
- Operating Temperature Range: 0 °C to +60 °C
- Storage Temperature Range: -40 °C to +85 °C
- Relative Humidity: 5% ~ 95% non-condensing
Functional Features:
- Full channel isolation design
- Automatic lead resistance compensation
- Linearization processing for RTD signal
- Over-temperature and open-circuit fault alarm
- On-board LED status indication
- Hot-swappable support
Performance Parameters:
- Measurement Accuracy: ±0.1 °C
- Resolution: 0.01 °C
- Isolation Voltage: 1500 VAC channel to backplane
- Maximum Lead Wire Resistance: 20 Ω (3-wire mode)
- Data Update Cycle: 100 ms
Material Composition:
- Housing: UL94 V0 flame-retardant industrial plastic
- Circuit Board: Low-drift high-precision FR-4 PCB
- Sampling Circuit: High-stability precision resistance and operational amplifier
- Terminals: Low-contact resistance copper alloy terminals
Structural Characteristics:
- Standard 3U rack-mount structure
- Front panel with power, run and fault indicators
- Rear high-reliability backplane connector
- Reasonable internal layout to reduce temperature interference
Working Principle:
The module provides constant current excitation to external RTD sensors. The resistance change of RTD caused by temperature variation is converted into voltage signal. After amplification, filtering, lead compensation and linearization, the signal is converted into digital temperature value and transmitted to DCS system.
Advantages & Highlights:
- High precision and excellent temperature measurement stability
- Support multiple wiring modes to adapt to different field wiring conditions
- Automatic lead resistance elimination reduces measurement error
- Complete fault diagnosis for sensor open/short circuit
Applicable Industries: Power plant boiler & turbine temperature measurement, chemical reaction kettle, furnace temperature monitoring, pharmaceutical temperature control
Model Series: Emerson Ovation Temperature Measurement Module Series
Installation Requirements:
- Vertical installation on DCS standard rack
- Use dedicated RTD shielded compensation cable for wiring
- Keep sensor cable away from high-power power cable
- Complete wiring mode configuration after installation
Usage Notes:
- Match RTD type and wiring mode in system software
- Do not pull or twist temperature signal cables violently
- Regularly verify measurement accuracy on site
- Replace damaged RTD sensor in time when open-circuit alarm occurs
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