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Metso D201379L
Product Name: Rugged Extended Cold Grade Universal Analog Input Module
Product Introduction: This module belongs to the Metso/Valmet D201 harsh environment process measurement series. It acquires field analog signals and RTD temperature signals for distributed control systems in low temperature, high vibration and electrically noisy industrial cabinets.
Detailed content
Technical Specifications:
- Backplane supply: 24 VDC nominal, maximum power 7.0 W
- Input channels: 8 fully galvanically isolated universal analog inputs
- Input types: 4–20 mA DC, 0–10 VDC, Pt100/Pt1000 two-wire or three-wire RTD
- Accuracy: 0.2% full scale across operating temperature band
- Isolation: 500 Vrms channel to backplane
- CMRR: greater than 80 dB at 50/60 Hz
- Vibration: 2 g sinusoidal, 10–1000 Hz continuous
- Operating temperature: -40°C to +70°C
- Storage temperature: -55°C to +75°C
- Humidity: 5%–95% non-condensing
- Dimensions: 100 mm height x 50 mm width x 20 mm depth
- Weight: 0.70 kg
- Certifications: CE, UL508A, ATEX Zone 2, FM Class I Division 2, IECEx
Functional Features:
- Low temperature compensated signal conditioning eliminates measurement drift below -25°C
- Automatic two-wire or three-wire RTD detection
- Per-channel open-circuit and short-circuit diagnostics
- Multi-stage EMI filtering and vibration signal averaging
- Front LED fault indication calibrated for wide temperature visibility
Material Composition:
- Enclosure: low-temperature impact reinforced UL94-V0 black ABS
- Circuit substrate: thickened FR4 fiberglass PCB with shock-isolating mounting pads
- PCB coating: flexible cold-grade acrylic conformal coating rated to -50°C
- EMI components: heavy-duty ferrite core inductors
- Terminals: nickel-plated beryllium copper cold-rated spring clamp contacts
- Heat management: extruded passive aluminum heat sink with matched thermal expansion alloy
Structural Characteristics:
- Single-slot DIN rail rack form factor mechanically interchangeable with standard D201376 positions
- Front removable vibration-locking terminal block
- Reinforced rear backplane pin header interlock
- Anti-vibration internal PCB brackets with silicone damping pads
- Side snap-lock rack latches rated for freeze-thaw cycles
Working Principle: Field current, voltage and RTD signals pass through EMI suppression stages into independent isolated conditioning channels. Precision analog-to-digital converters convert the conditioned signals into digital values. On-board averaging and subzero temperature compensation stabilize the readings. The microcontroller buffers calibrated data and transmits it over the rack backplane serial bus to the DCS CPU for monitoring, alarming and predictive maintenance.
Installation Requirements: Mount in the designated D201 series rack slot. Apply 24 VDC backplane power within nominal range. Use the front terminal block for sensor wiring and confirm RTD two-wire or three-wire configuration in software. Verify grounding and shield termination before energizing.
Usage Precautions: Do not install in moist enclosures without proper ingress protection. Confirm isolation ratings before connecting live field loops. Replace terminal blocks only after backplane de-energization unless the system supports hot maintenance. Inspect conformal coating and spring terminals in cyclic freezing environments at scheduled intervals.
