Technical Specifications
- Backplane Supply Voltage: 24 VDC nominal, power consumption 7.0 W maximum
- Input Channel Count: 8 fully galvanically isolated universal analog input channels
- Supported Signal Input Types: 4–20 mA current loop, 0–10 V DC voltage, Pt100 / Pt1000 two/three-wire RTD sensors
- Static Measurement Accuracy: 0.2% Full Scale across full temperature operating band
- Channel Isolation Rating: 500 Vrms channel-to-backplane galvanic separation
- CMRR Noise Rejection Ratio: >80 dB at 50/60 Hz industrial mains frequency
- Vibration Resistance: Continuous 2 g sinusoidal vibration, frequency range 10–1000 Hz
- Operating Temperature Range: -40 °C to +70 °C (L-grade extended cold specification; base D201376 limited to -25 °C)
- Storage Temperature Range: -55 °C to +75 °C
- Relative Humidity Tolerance: 5%–95% non-condensing
- Physical Dimensions: 100 mm (H) × 50 mm (W) × 20 mm (D), identical footprint to D201376
- Net Weight: 0.70 kg
- Global Certifications: CE, UL508A, ATEX Zone 2, FM Class I Div 2, IECEx
Functional Features
- Low-temperature compensated precision signal conditioning circuits eliminating cold-induced measurement drift below -25 °C
- Cold-resistant conformal acrylic PCB coating preventing ice crystal condensation on circuit traces in freeze-thaw cycles
- All native ruggedized D201376 functions retained: multi-stage EMI filtering, auto two/three-wire RTD detection, vibration signal averaging, per-channel open/short circuit fault diagnostics
- Low-temperature optimized spring terminal hardware maintaining stable contact resistance at -40 °C
- Wide-temperature LED driver assemblies ensuring visible channel fault indication under extreme cold ambient
Material Composition
- Outer Enclosure: Low-temperature impact reinforced UL94-V0 flame retardant black ABS plastic
- Circuit Substrate: Thickened FR4 fiberglass PCB with shock-absorbing isolation mounting pads
- PCB Protective Coating: Flexible cold-grade acrylic conformal coating with -50 °C continuous flexibility
- EMI Suppression Components: Heavy-duty ferrite core inductors with wide-temperature magnetic stability
- Wiring Terminals: Nickel-plated beryllium copper cold-rated spring-clamp contact assemblies
- Internal Heat Dissipation: Solid extruded passive aluminum heat sink with thermal expansion matched alloy
Structural Characteristics
- 100% mechanical interchangeable single-slot DIN rail rack mount form factor compatible with standard D201376 rack positions
- Front heavy-duty vibration-locking removable terminal block for field sensor wiring termination
- Reinforced shock-absorbing rear backplane pin header interlock assembly
- Anti-vibration internal PCB mounting brackets secured with temperature-resistant silicone damping pads
- Side integrated snap-lock rack latches with cold-temperature plastic fatigue resistance
Working Principle
Field analog and RTD temperature signals pass through multi-stage industrial EMI noise suppression circuits before entering independent isolated channel conditioning hardware. Precision analog-to-digital converters convert continuous physical signals to digital measurement data, stabilized by configurable on-board averaging algorithms to suppress vibration-induced signal fluctuations. All internal signal processing circuits incorporate dedicated subzero temperature compensation logic to lock measurement accuracy at fixed 0.2% FS from -40 °C up to +70 °C. Calibrated digital data packets are buffered on the on-board microcontroller and transmitted over rack backplane serial bus to central DCS CPU for equipment monitoring and predictive maintenance logic execution. Conformal coating fully insulates PCB circuitry from condensed moisture and frost formation in unheated cabinet environments.
Core Advantages
- Extended -40 °C minimum operating temperature enables installation in arctic open-pit mines, northern pipeline unheated control cabinets
- No precision derating across full cold operating band compared to standard D201376 model
- Direct plug-and-rack field retrofit compatibility with D201376 for cold site hardware upgrades
- Full rugged vibration resistance identical to base model, suitable for crushing, conveyor heavy machinery racks
- Retains complete hazardous location certification for underground mineral mining cold-climate deployments
Applicable Industries
Arctic mineral open-pit & underground mining, northern aggregate crushing plants, cold-region cement manufacturing, subzero natural gas pipeline monitoring stations, northern thermal power plant auxiliary equipment measurement racks, remote cold-climate heavy industrial process monitoring
Installation Mandatory Requirements
- Mount exclusively on reinforced vibration-rated Metso standard DIN rail DCS rack systems
- All field sensor wiring must utilize low-temperature shielded twisted pair industrial cable rated minimum -50 °C
- Cable shielding grounding limited to single-point connection at control cabinet protective earth terminal bar
- Maintain minimum 20 mm vertical airflow clearance above and below module for consistent thermal dissipation
- Rack mounting frame must be rigidly anchored to eliminate structural vibration resonance points
- Cabinet enclosure minimum ingress protection rating IP54 to block snow, rain and airborne particulate intrusion
Operational Maintenance & Usage Restrictions
- Bi-annual full channel calibration mandatory for permanent arctic site installation
- Ambient operating temperature must not drop below -40 °C without supplementary cabinet heating insulation
- Prohibit thermal cycling exceeding 25 °C per hour temperature swing rate to avoid internal component stress
- Maximum field sensor cable run length limited to 280 meters for all analog and RTD input wiring
- Do not install within 50 cm of high-power variable frequency motor drive electrical enclosures
- Spare part long-term storage requires temperature-controlled dry warehouse environment (10 °C to 40 °C)
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