Metso D200175L

Technical Specifications

• Number of Analog Input Channels: 4 fully isolated analog channels
• Supported Signal Formats: 4–20 mA current loop, 0–5 VDC, 0–10 VDC voltage signals
• Channel-to-Channel Isolation Voltage: 1000 Vrms reinforced galvanic isolation
• Signal Resolution: 16-bit analog-to-digital conversion (ADC)
• Measurement Full Scale Accuracy: ±0.05% FS
• Backplane Operating Supply: 24 VDC nominal (10–30 VDC operating range)
• Module Power Consumption: 180 mA maximum
• Operating Temperature Range: -20 °C ~ +70 °C
• Storage Temperature Range: -40 °C ~ +85 °C
• Humidity Tolerance: 5% – 95% relative humidity, non-condensing
• Vibration Resistance: 2 g (10–150 Hz per IEC 60068-2-6)
• Signal Noise Floor: ≤ 2 μV RMS (D200175 base model: ≤ 12 μV RMS)
• Dimensions (W×H×D): 100 mm × 70 mm × 30 mm
• Net Weight: 0.55 kg
• Certifications: CE, UL, ATEX Zone 2, SIL 2 functional safety compliance

Functional Features

1. Four independent reinforced isolated analog channels with dedicated low-noise operational amplifiers per channel
2. 8-stage passive RC low-pass filter network on each input channel to suppress high-frequency industrial electromagnetic noise
3. Software-programmable signal type selection via DCS configuration software (current/voltage mode switch)
4. Built-in open-loop fault detection for 4–20 mA transmitter wiring breakage alarms
5. Front panel individual channel LED status indicators for signal presence and fault notification
6. High-speed D20 backplane parallel communication bus for real-time analog data transmission
7. Hot-swappable rack mounting supporting online maintenance without full system shutdown

Performance Parameters

• Common mode rejection ratio (CMRR): ≥ 110 dB at 50 Hz industrial interference frequency
• Differential mode rejection ratio (DMRR): ≥ 95 dB at 100 kHz switching noise band
• ADC conversion sampling rate: 50 Hz per channel simultaneous sampling
• Temperature drift coefficient: ≤ 0.8 ppm/°C full scale
• Maximum field wiring cable length: 1500 m double-shielded twisted pair cable
• MTBF: 385,000 hours at 25 °C ambient operating temperature

Material Composition

• Front Panel Housing: ABS flame retardant industrial plastic with anti-static coating
• Circuit Substrate: 4-layer FR-4 high-precision PCB with separate analog/digital ground plane isolation
• Isolation Components: Reinforced insulation signal transformers for each analog channel
• Signal Amplifiers: Ultra-low noise JFET operational amplifier chips
• Terminal Blocks: Gold-plated spring-clamp PA66 flame retardant terminals for low contact resistance
• Filter Components: High-precision metal film resistors, polypropylene low-leakage capacitors

Structural Characteristics

• Single-width standard D20 rack slot form factor, mechanical footprint matching all D20 I/O modules
• Separate analog signal wiring terminal zone and digital backplane bus zone partitioned by internal metal shielding plate
• Dual-layer internal EMC shielding to block digital bus noise coupling into analog measurement circuits
• Front panel channel LED indicators aligned with corresponding wiring terminal positions for rapid fault location
• Dual side spring locking latches for stable rack mounting and hot swap operation

Working Principle

Advantage Highlights

1. Ultra-low noise floor enables high-precision measurement of weak industrial analog sensor signals
2. 1000 Vrms reinforced channel isolation eliminates ground loop drift in multi-transmitter distributed measurement systems
3. SIL 2 safety certification compliant for critical process control safety loops
4. Wide temperature drift stability maintains measurement accuracy across extreme plant ambient temperature fluctuations
5. Hot-swappable design eliminates full system shutdown requirement during module replacement
6. Multi-stage integrated filtering removes requirement for external signal filter accessories

Applicable Industries

Model Series Affiliation

Installation Requirements

1. Insert module horizontally into Metso D20 series DIN rack backplane slot, fully engage gold-plated edge connector pins
2. Lock dual side spring latches to secure module position; verify power LED illumination after rack power energization
3. Field analog signal wiring uses double-shielded twisted pair copper cables, cable shield grounded only at DCS cabinet grounding terminal
4. Maintain minimum 20 cm separation between analog signal cables and variable frequency drive high-power output wiring
5. Connect rack cabinet protective earth ground to establish unified system noise reference potential
6. Tighten spring-clamp wiring terminals to calibrated torque value 0.5 N·m

Operation & Maintenance Precautions

1. Perform hot swap module replacement only after confirming DCS system online modification permission is enabled
2. Conduct monthly measurement calibration check using certified standard signal calibrator to maintain ±0.05% FS accuracy
3. Strictly avoid routing analog signal cables alongside arc welding equipment, high-voltage switchgear or large induction motors
4. Do not apply input signal exceeding 24 VDC to any analog channel terminal to prevent front-end amplifier burnout
5. Update module firmware exclusively via official Metso DNA DCS configuration software to preserve noise suppression circuit performance
6. Clean terminal block contact surfaces every 6 months to remove conductive dust causing signal drift measurement errors