Product Brief
L-suffix extended low-temperature variant of base D201189 AI8H high-precision analog input module, incorporating cold-rated electronic components and expanded temperature operating range for unheated industrial cabinet outdoor and underground installations, identical high-accuracy measurement performance to standard D201189 hardware.
Technical Specifications
- Backplane Operating Power: 24 V DC, 6.8 W nominal power consumption
- Input Channel Configuration: 8 fully isolated high-precision analog input channels
- Supported Sensor Signal Types: 4–20 mA, 0–5 V, 0–10 V, Pt100, Pt1000, all standard thermocouple grades
- Measurement Static Accuracy: 0.07% Full Scale (temperature invariant across full operating band)
- Channel Isolation Rating: 1000 Vrms galvanic channel-to-backplane isolation
- CMRR Noise Rejection Performance: 92 dB at 50/60 Hz industrial mains frequency
- Full Eight-Channel Scan Cycle Time: Fixed 320 ms
- Operating Temperature Range: -40 °C to +60 °C (L-grade extended cold rating)
- Physical Dimensions: Exact matching footprint to D201189 (100 × 50 × 20 mm)
- Net Weight: 0.40 kg
- Certifications: CE, UL508A, ATEX Zone 2, IECEx
Functional Features
- Low-temperature optimized internal passive components eliminating measurement drift below -10 °C
- Cold-rated conformal PCB protective coating preventing condensation ice formation
- All native D201189 functionality retained: digital signal filtering, open-wire fault detection, cold-junction compensation
- Low-temperature lubricated terminal block spring hardware preventing contact resistance rise in freeze cycles
- Extended cold-temperature LED driver circuits maintaining visible diagnostic status at -40 °C
Material Composition
- Enclosure: Low-temperature impact-resistant UL94-V0 ABS plastic housing
- PCB Coating: Flexible low-temperature acrylic conformal protection coating
- Terminal Spring Hardware: Nickel-plated beryllium copper cold-rated contact springs
- Internal Wiring: Teflon insulated stranded copper wiring rated for -50 °C continuous exposure
Structural Characteristics
- 100% mechanical interchangeable rack mounting footprint with base D201189 modules for field retrofit upgrades
- Identical front removable wiring terminal block and rear backplane pin header assembly as standard grade hardware
- Reinforced side mounting latches with cold-temperature vibration resistance
Working Principle
Signal conditioning, analog-to-digital conversion, digital filtering, and backplane communication operating logic identical to standard Metso D201189 AI8H modules. All internal electronic components integrate dedicated temperature compensation circuitry to preserve full 0.07% FS measurement precision across the full -40 °C to +60 °C operating temperature band without accuracy derating. Conformal PCB coating prevents moisture condensation ice crystal formation on circuit traces in unheated cold cabinet environments.
Core Advantages
- -40 °C minimum operating temperature enables installation in unheated outdoor mine and pipeline control cabinets
- Zero accuracy drift across entire cold operating temperature range vs standard D201189 limited to -10 °C
- Direct plug-and-rack interchangeability with base D201189 modules for site hardware upgrades
- Cold-rated terminal hardware eliminates high contact resistance faults in freeze-thaw cycling environments
- Retains full ultra-high precision 24-bit ADC measurement performance of standard AI8H series hardware
Applicable Industries
Open-pit mineral mining underground control racks, northern natural gas pipeline monitoring stations, outdoor municipal water treatment pump house cabinets, cold-climate pulp & paper mill auxiliary measurement racks, remote environmental emissions monitoring stations
Installation Mandatory Requirements
- Mount exclusively to standard Metso DCS DIN rail rack systems
- All field sensor wiring must utilize low-temperature rated shielded twisted pair cable
- Control cabinet enclosure must prevent direct liquid water ingress (IP54 minimum rating)
- Maintain minimum 20 mm vertical airflow clearance above and below module rack slots
- Facility protective earth ground resistance must measure <4 Ω at rack mounting frame
Operational Maintenance & Usage Restrictions
- Annual full channel calibration mandatory for all outdoor cold-site deployments
- Ambient operating temperature must not drop below -40 °C without supplementary cabinet heating
- Prohibit rapid thermal cycling exceeding 25 °C per hour temperature swing rate
- Maximum field sensor cable run length limited to 300 meters for all analog input signals
- Spare part inventory storage requires temperature-controlled dry warehouse environment
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