Product Brief
Standard rack-mounted analog input expansion module dedicated to Metso DCS/PLC control platforms, L suffix denotes extended low-temperature operating specification for cold-site industrial deployments. Converts multi-type field analog sensor signals to standardized digital bus data for central controller processing.
Technical Specifications
- Power Supply: 24 VDC nominal, operating range 18–30 VDC; power consumption 7.2 W maximum
- Input Channel Count: 8 fully isolated analog input channels
- Supported Input Signal Types: 4–20 mA current loop, 0–10 V DC voltage, J-type thermocouple, Pt100 RTD
- Measurement Accuracy: 0.1% Full Scale (FS) across all signal ranges
- Channel Isolation Rating: 500 Vrms channel-to-backplane galvanic isolation
- CMRR Noise Rejection: 86 dB at 50/60 Hz industrial frequency
- Response Latency: Fixed 250 ms per full channel scan cycle
- Operating Temperature Range: -40 °C to +60 °C (L grade extended cold range; base D201134 limited to -10 °C)
- Storage Temperature: -50 °C to +70 °C
- Relative Humidity Tolerance: 5%–95% non-condensing
- Physical Dimensions: 100 mm (H) × 50 mm (W) × 20 mm (D)
- Net Weight: 0.75 kg
- Certifications: CE, UL508A, ATEX Zone 2
Functional Features
- Per-channel short-circuit electronic fuse protection with self-reset recovery
- Real-time LED status indicator for each channel (fault, overrange, normal operation)
- On-board signal cold-junction compensation for thermocouple inputs
- Hardware overvoltage clamping for surge protection up to 36 V DC transient
- Backplane high-speed serial bus communication with main CPU rack
- Configurable channel scaling via Metso DNA control software suite
Material Composition
- Outer Enclosure: Flame-retardant black ABS plastic, UL94-V0 fire rating
- Internal Circuit Substrate: FR4 high-temperature fiberglass PCB with gold-plated signal traces
- Backplane Connector: Copper alloy with nickel plating for oxidation resistance
- Terminal Block: Polyamide PA66 high-temperature insulation
Structural Characteristics
- Horizontal DIN rail rack mount form factor, single-slot width rack footprint
- Front removable spring-clamp wiring terminal block for field sensor wiring
- Rear dual-row pin header interlock with Metso standard DCS backplane
- Integrated passive aluminum heat sink for PCB thermal dissipation
- Snap-lock side latches for rigid rack installation without auxiliary fasteners
Working Principle
Field analog electrical signals transmitted from process sensors enter each isolated channel circuit. Passive signal conditioning circuits filter industrial electromagnetic interference, then precision 16-bit analog-to-digital converters translate continuous analog values to discrete digital binary data. Digital channel data packets are buffered on the module’s local microcontroller, then transmitted over the rack backplane serial bus to the primary PLC CPU for closed-loop process calculation and control output execution.
Core Advantages
- L-grade wide low-temperature operating range enables outdoor and underground mining site installation
- Uniform 0.1% FS high precision eliminates signal measurement drift across all sensor types
- Per-channel independent galvanic isolation prevents cross-channel noise crosstalk
- Plug-and-rack hot-swappable hardware without full system power shutdown
- Unified software configuration compatible with all Metso DNA control systems
Applicable Industries
Mining & mineral processing, pulp & paper manufacturing, petrochemical refining, municipal wastewater treatment, thermal power generation, metal smelting, offshore marine process control
Installation Mandatory Requirements
- Mount exclusively on Metso standard 19-inch PLC rack DIN rail; vertical installation only, no inverted mounting
- Maintain minimum 20 mm vertical airflow clearance above and below module for heat dissipation
- Field wiring cable maximum length limited to 300 meters for 4–20 mA signals
- Separate analog signal wiring from high-voltage power cables by minimum 15 cm distance
- Backplane rack must be grounded to facility protective earth with <4 Ω ground resistance
Operational Maintenance & Usage Restrictions
- Prohibit exposure to condensing humidity, chemical vapor, or abrasive particulate dust without sealed control cabinet enclosure
- Annual calibration required for thermocouple and RTD measurement channels via Metso certified calibration tools
- Do not apply input signals exceeding 32 V DC transient voltage to any channel terminal
- Hot-swap operation only permitted when all connected field transmitters are de-energized
- Storage environment must exclude direct UV sunlight exposure for long-term spare part inventory
Reviews
There are no reviews yet.