Description
Emerson SP4402
Technical Specifications
- Product type: Flow computer / RTU expansion I/O module
- Supply: DC12 V to DC30 V from RTU
- Analog input: 4 to 20 mA
- Discrete I/O: Digital channels
- Pulse input: Flow meter pulse
- Communication: ROC bus
- Operating temperature: -40 °C to +75 °C
- Storage temperature: -50 °C to +85 °C
- Humidity: 5 % to 95 %, non-condensing
- Protection: IP65 field mount or IP20 panel
- Certification: ATEX / FM hazardous area
- Mounting: DIN rail / field enclosure
- LEDs: Channel and module status
Functional Features
- 4 to 20 mA analog acquisition
- Flow meter pulse counting
- Discrete input and output
- ROC bus communication to RTU
- Wide temperature range
- Hazardous area certified
- Per-channel diagnostics
- Loop powered transmitter support
- Event logging
- Battery backed real-time clock
Application Scenarios
- Oil and gas pipeline flow measurement
- Wellhead RTU monitoring
- Custody transfer metering
- Gas distribution pressure monitoring
- Tank level remote monitoring
Materials and Construction
- Housing: Coated aluminum or plastic
- PCB: FR4 conformal coated
- Terminals: Screw terminals
- Isolation: Analog channel isolation
- Seal: Gasket for field enclosure
- LED: Status indicators
Structural Features
- Rectangular DIN rail or field enclosure
- Front panel LEDs
- Removable screw terminals
- Internal analog front end and digital logic
- Internal conformal coating
- Compact modular design
Working Principle RTU communicates with module over ROC bus. Analog 4 to 20 mA signals are sampled and digitized. Pulse inputs count meter pulses for flow totalization. Discrete channels read switches and drive outputs. Data is uploaded to flow computer. Hazardous area protection limits energy.
Installation Requirements
- DIN rail mount in RTU enclosure
- Wire 4 to 20 mA transmitters
- Connect pulse meter cable
- DC supply from RTU
- Grounding
- Temperature -40 °C to +75 °C
- Configure channels and engineering units
- ATEX installation rules for hazardous area
Precautions
- Transmitter loop power matches
- Pulse meter shielding grounded
- Seal enclosure to maintain rating
- Do not exceed energy parameters in hazardous area
- Store spares in dry packaging
- Periodically verify flow calibration
- Isolate wiring before service
