Product Short Description
Product Introduction
Original factory replacement spare assembly dedicated to Emerson DeltaV distributed control platform, responsible for conditioning, filtering and galvanic isolation of 4–20mA process signals transmitted between DeltaV I/O cards and field process transmitters. Factory calibrated single integrated unit without disassembly allowed.
Description
Technical Specifications
- Signal Processing Capacity: 16-channel analog signal conditioning
- Input Nominal Signal: 4–20mA DC two-wire transmitter loop
- Loop Supply Voltage: 24V DC isolated field power per channel
- Isolation Voltage: 3000V DC channel-to-system bus isolation
- Filter Cutoff Frequency: 10Hz low-pass anti-aliasing filter
- Power Draw: 5.1W maximum under full channel load
- Operating Ambient Temperature: 0°C ~ +60°C
- Shock Resistance: 15g IEC 60068-2-27 industrial shock standard
Functional Features
- Per-channel isolated 24V transmitter power supply without cross-channel interference
- Active analog low-pass filter suppresses variable frequency drive high-frequency noise
- Built-in open-loop current detection for failed field transmitters
- Onboard non-volatile memory stores factory calibration coefficients
- Digital fault flag transmission via DeltaV internal backplane bus to controller
Performance Parameters
- Loop Current Measurement Accuracy: ±0.1% full scale
- Isolation Leakage Current: <1μA at rated isolation voltage
- Filter Attenuation: 40dB minimum attenuation above 50Hz
- Calibration Stability: 24-month factory calibration validity cycle
Material Composition
PCB substrate high-Tg FR-4, enclosure flame retardant PC plastic, isolation transformer with vacuum-impregnated epoxy insulation, gold-plated backplane contact pins
Structural Characteristics
DeltaV standard 8-slot rack pluggable assembly, front removable spring cage terminal block, integrated passive aluminum heat sink strip along module side edge
Working Principle
Field two-wire transmitters draw loop current proportional to physical process variables, current signal enters assembly’s isolated power and conditioning circuit, filtered analog signal converted to digital value via internal ADC chip, digital diagnostic and measurement data uploaded to DeltaV controller through rack backplane serial bus.
Advantage Highlights
- DeltaV system native compatibility, zero software reconfiguration after replacement
- High isolation rating suitable for petrochemical explosion-proof cabinet installation
- Integrated power supply and signal conditioning reduces separate external barrier terminals
- Rugged mechanical construction tolerates continuous plant floor vibration
Applicable Industries
Petroleum refining, natural gas processing, chemical synthesis, pharmaceutical batch production, food & beverage process control, offshore platform automation
Installation Requirements
- Mount exclusively inside Emerson DeltaV series standard control rack
- Ambient cabinet air circulation velocity ≥0.3m/s at maximum operating temperature
- Shielded twisted pair cable mandatory for all field signal wiring
- Rack protective earth connection with 6mm² grounding copper cable
Usage Precautions
- Do not disassemble sealed epoxy isolation components, voids factory calibration warranty
- No overloading single channel above 22mA DC loop current
- Store spare units within 10°C ~ 30°C temperature range, avoid direct sunlight exposure
- Replace assembly immediately upon persistent channel fault flag reported by DeltaV operator station
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