Description
Emerson VE4003S2B9
Technical Specifications
- Signal type: RTD resistance temperature signal
- Supported sensor types: Pt100, Pt1000, Cu50, Ni120
- Wiring modes: 2-wire, 3-wire, 4-wire
- Channel quantity: 8 channels
- Resolution: 16-bit analog-to-digital conversion
- Operating temperature: 0°C to +60°C
- Storage temperature: -40°C to +85°C
- Relative humidity: 5% to 95%, non-condensing
- Mounting: Ovation standard rack backplane installation
- Communication interface: Ovation proprietary rack backplane bus
- Diagnostic functions: Sensor open circuit detection, short circuit detection, abnormal resistance alarm
Functional Features
- 8 independent RTD input channels for multi-point temperature acquisition.
- Automatic lead wire resistance compensation for 3-wire and 4-wire RTD wiring.
- Multiple RTD sensor types configurable via engineering workstation software.
- Real-time channel fault diagnosis to detect broken sensor wire and short circuit.
- Electrical isolation between field sensor circuit and DCS backplane to eliminate ground loop interference.
- Each channel integrates surge protection for transient voltage suppression.
- Support hot swap replacement in energized Ovation rack.
- Front panel LED indicators show module running state and channel fault information.
- Power-up self-test and continuous background self-test during normal running.
Application Scenarios Power plant turbine metal temperature monitoring, chemical pipeline temperature monitoring, furnace temperature measurement, oil refinery process temperature control, water treatment high temperature pipeline monitoring.
Performance Parameters
- Measurement accuracy: ±0.1°C for Pt100 sensor under 4-wire connection
- A/D conversion sampling rate: 8 samples per second per channel
- Channel isolation voltage: 1500V AC
- Resistance measurement range: 0Ω to 400Ω
Material Composition
- Front panel: Flame retardant plastic with silk screen printing
- Main PCB: FR-4 flame retardant printed circuit board with conformal coating
- A/D converter: Industrial high precision analog-to-digital chip
- Isolation component: Digital isolator
- LED indicator: Industrial high brightness LED
- Backplane connector: Gold plated edge connector
Structural Characteristics Standard Ovation I/O card form factor. Rear gold plated edge connector plugs into rack backplane. Front panel has extraction handle and LED indicator window. PCB separates analog RTD measurement circuit and digital communication circuit to reduce electromagnetic interference. Each channel uses independent signal conditioning circuit.
Working Principle The module provides constant excitation current to RTD sensor. Temperature variation changes sensor resistance, resulting in voltage variation. Signal conditioning circuit filters noise and amplifies weak analog signal. A/D converter converts analog signal to digital value. The module calculates temperature according to RTD characteristic curve and uploads data to Ovation controller via backplane bus. The module continuously monitors channel resistance value and reports fault when wire break or short circuit occurs.
Installation Requirements
- Insert VE4003S2B9 along rack guide rail, push fully and lock front handle.
- Use shielded twisted pair cable for RTD wiring. Separate signal cable from high voltage power cable.
- Configure sensor type and wiring mode in Ovation engineering workstation.
- Complete loop calibration and point test before online commissioning.
- Ensure cabinet protective grounding is reliable, grounding resistance less than 4 ohms.
- Keep cabinet ventilation path unobstructed.
Usage Precautions
- Do not connect high voltage signal to RTD input terminals. Overvoltage burns channel circuit.
- Use 4-wire wiring for high precision temperature measurement.
- Hot swap must follow Ovation official maintenance procedure.
- Do not touch gold plated connector pins by hand.
- No field repairable components. Replace entire module after failure.
- Prevent metal debris falling into rack slot during installation.
