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Metso D201380L
Product Name: Extended Cold Grade 4-Channel Rugged Analog Output Control Module
Product Introduction: This module is part of the Metso/Valmet D201 harsh environment analog control output series. It delivers isolated 4–20 mA control signals to valves, actuators and smart positioners in subzero and vibration-intensive process plants, with HART overlay for digital communication.
Detailed content
Technical Specifications:
- Backplane power: 24 VDC nominal, maximum consumption 6.1 W
- Output channels: 4 galvanically isolated analog outputs
- Standard output: 4–20 mA DC, secondary 0–10 VDC
- Maximum load resistance: 750 ohms per 4–20 mA channel
- Accuracy: ±0.08% full scale across operating temperature band
- Isolation: 300 Vrms channel to backplane
- HART support: HART 5, HART 6, HART 7 overlay
- Vibration: 2 g sinusoidal, 10–1000 Hz continuous
- Operating temperature: -45°C to +65°C
- Storage temperature: -50°C to +70°C
- Dimensions: 98 mm height x 48 mm width x 19 mm depth
- Weight: 0.62 kg
- Certifications: CE, UL, ATEX Zone 2, FM Class I Division 2
Functional Features:
- Low-temperature stabilized linear output drivers
- Configurable fail-safe state: hold last value, force 4 mA, force 20 mA
- Per-channel short-circuit, overload and reverse-polarity protection
- HART modulation for two-way communication with smart field devices
- Front fault LED per channel
Material Composition:
- Enclosure: low-temperature fatigue-resistant UL94-V0 ABS
- Circuit board: double-sided FR4 with flexible cold-grade acrylic conformal coating
- Output drivers: wide-temperature operational amplifiers rated to -50°C
- Terminals: nickel-plated beryllium copper cold-rated spring clamp
- Heat dissipation: passive aluminum side cooling fins with low-expansion alloy
Structural Characteristics:
- Single-slot Metso DCS horizontal DIN rail rack format
- Front removable vibration-locking terminal block
- Rear dual-row pin header interlock with standard backplane bus
- Silicone PCB mounting pads for vibration damping
- Reinforced snap rack latches for freeze-thaw durability
Working Principle: The DCS CPU sends digital setpoints over the backplane bus. The module microcontroller buffers the commands and uses cold-compensated digital-to-analog converters to generate reference voltages. Linear current amplifiers produce regulated 4–20 mA loops. HART data is modulated onto the current loop for remote configuration and diagnostics. Protection circuits disable faulty channels during short-circuit or overload events.
Installation Requirements: Install in the assigned D201 analog output rack position. Supply 24 VDC backplane power. Connect field loops to the front terminal block and set load resistance below 750 ohms. Enable HART only on channels wired to HART-capable positioners.
Usage Precautions: Never bypass per-channel protection fuses or solid-state limiters. Validate fail-safe mode before automatic control handover. Perform periodic LED and loop-current checks in subzero cabinets. Remove power before replacing terminal blocks unless hot-swap is authorized for the rack type.
