Emerson VE4005S2B18CH4-20MA,HART

Emerson VE4005S2B18CH4-20MA,HART

Product Brief Introduction: VE4005S2B18CH4-20MA,HART is Ovation DCS HART analog input module. It receives 4-20mA analog signals from HART smart field transmitters. The module supports HART digital communication superimposed on 4-20mA current loop. It converts analog current signal to digital process value and reads HART secondary variables, device tag, diagnostic information and firmware version from HART instruments. It is installed in Ovation I/O rack for smart transmitter signal acquisition and HART device management.

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Description

Emerson VE4005S2B18CH4-20MA,HART

Technical Specifications

  • Signal type: 4-20mA analog signal + HART digital protocol
  • Channel quantity: 8 channels
  • Resolution: 16-bit analog-to-digital conversion
  • Isolation: Channel-to-backplane electrical isolation
  • 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: Ovation rack backplane bus + HART modem on each channel
  • Diagnostic functions: Loop open circuit detection, HART device communication fault detection, channel overvoltage protection

Functional Features

  1. 8 independent channels for 4-20mA analog input and HART digital communication.
  2. 16-bit high precision A/D conversion to acquire primary process variable from transmitter.
  3. Integrated HART modem per channel to read secondary variables, device tag, serial number and diagnostic alarms.
  4. Channel open circuit detection to identify broken wiring of transmitter loop.
  5. Electrical isolation between field HART loop and DCS backplane to block ground loop interference.
  6. Each channel has built-in overvoltage and overcurrent protection.
  7. Support hot swap replacement in powered Ovation rack.
  8. Front panel LED indicators show module running state and channel fault status.
  9. Power-up self-test and continuous background self-test.
  10. Upload HART device diagnostic data to Ovation asset management software for predictive maintenance.

Application Scenarios Thermal power plant smart pressure and flow transmitter monitoring, chemical plant HART instrument management, oil refinery smart transmitter signal collection, pharmaceutical factory HART instrument loop monitoring.

Performance Parameters

  • Analog measurement accuracy: ±0.1% full scale
  • A/D sampling rate: 10 samples per second per channel
  • HART communication refresh rate: 1 reading per 2 seconds per channel
  • Channel isolation voltage: 1500V AC
  • Input current range: 4mA to 20mA

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
  • HART modem: Integrated HART communication 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 fitted with extraction handle and LED indicators. PCB layout separates analog 4-20mA signal circuit, HART communication circuit and digital backplane communication circuit. Each channel has independent HART modem circuit.

Working Principle Field HART transmitter outputs 4-20mA current carrying process value, and superimposes HART digital frequency-shift keying signal on the current loop. The module’s signal conditioning circuit samples 4-20mA analog current. A/D converter converts analog signal to digital primary variable. The HART modem demodulates digital HART data from the loop, reads secondary variables and device diagnostic information. All data is transmitted to Ovation controller and asset management software via backplane bus. The module continuously monitors loop current and HART communication status, and reports fault upon communication failure or wire break.

Installation Requirements

  1. Insert VE4005S2B18CH4-20MA,HART into rack guide slot, push fully and lock front handle.
  2. Use shielded twisted pair cable for HART transmitter wiring. Keep signal cable separated from high voltage power cable.
  3. Configure HART enable and channel range in Ovation engineering workstation.
  4. Complete loop test and HART device communication test before commissioning.
  5. Ensure cabinet protective grounding is reliable, grounding resistance less than 4 ohms.
  6. Confirm each HART loop has proper loop resistance to meet HART communication requirement.

Usage Precautions

  1. Do not connect high voltage signal to analog input terminals. Overvoltage destroys channel circuit.
  2. Maintain proper loop resistance for HART communication. Too low or too high resistance causes HART communication failure.
  3. Hot swap must follow Ovation official maintenance procedure.
  4. Do not touch gold plated connector pins by hand.
  5. No field repairable components. Replace whole module on failure.
  6. Prevent metal debris falling into rack slot during installation.

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