Metso D201126

Technical Specifications

• Number of Analog Output Channels: 8 isolated analog output channels
• Supported Output Signal Formats: 4–20 mA current loop, 0–10 VDC voltage output
• Channel-to-Channel Isolation Voltage: 500 Vrms galvanic isolation
• Digital-to-Analog Conversion Resolution: 16-bit DAC per channel
• Output Full Scale Accuracy: ±0.1% FS
• Backplane Operating Supply: 24 VDC nominal (10–30 VDC operating range)
• Module Maximum Consumption Current: 240 mA
• Operating Temperature Range: -10 °C ~ +60 °C
• Storage Temperature Range: -40 °C ~ +85 °C
• Humidity Tolerance: 5% – 95% relative humidity, non-condensing
• Vibration Resistance: 1.5 g (10–150 Hz per IEC 60068-2-6)
• Maximum Load Resistance (4–20 mA mode): 750 Ω per channel
• Dimensions (W×H×D): 100 mm × 70 mm × 30 mm
• Net Weight: 0.53 kg
• Certifications: CE, UL, ATEX Zone 2 industrial certification

Functional Features

1. 8 independent galvanically isolated analog output channels with dedicated DAC conversion circuits
2. Software-programmable signal format switching (current loop / voltage output) via DCS configuration software
3. Built-in output short-circuit protection circuit for each channel with automatic recovery function
4. Front panel individual channel LED status indicators for output active and fault state visualization
5. Programmable output ramp rate limiting to prevent sudden actuator position shock impact
6. High-speed D20 backplane parallel communication bus for real-time setpoint command reception
7. Hot-swappable rack mounting supporting online module replacement without full system shutdown

Performance Parameters

• Output signal temperature drift coefficient: ≤ 1.2 ppm/°C full scale
• DAC update frequency: 25 Hz simultaneous refresh across all 8 channels
• Output signal noise floor: ≤ 8 μV RMS
• Common mode rejection ratio (CMRR): ≥ 85 dB at 50 Hz industrial interference frequency
• Maximum field wiring cable length: 800 m shielded twisted pair cable (4–20 mA mode)
• MTBF: 390,000 hours at 25 °C ambient operating temperature

Material Composition

• Front Panel Housing: ABS flame retardant industrial plastic with anti-static surface treatment
• Circuit Substrate: Double-sided FR-4 flame retardant PCB with separated analog/digital circuit zones
• Isolation Components: Photo-isolation chips for each analog output channel
• Drive Components: Precision operational amplifier chips with low output offset voltage
• Terminal Blocks: Spring-clamp PA66 flame retardant terminals with tin-plated copper contacts
• Protection Components: PTC self-resetting fuses for per-channel short-circuit current limiting

Structural Characteristics

• Single-width standard D20 rack slot mechanical form factor, interchangeable with all D20 analog I/O modules
• Internal metal EMC shielding plate separating digital backplane bus circuit and analog output drive circuits
• Front panel wiring terminal array aligned with corresponding channel LED indicators for rapid fault location
• Dual side spring locking latches for stable rack insertion and hot swap maintenance operation
• Integrated passive heat dissipation structure eliminating requirement for auxiliary cooling fans

Working Principle

Advantage Highlights

1. 8-channel multi-output design reduces total rack slot occupation vs 4-channel single-density modules
2. Per-channel self-resetting short-circuit protection eliminates permanent module damage risk from field wiring faults
3. Programmable output ramp rate prevents rapid actuator movement mechanical shock and equipment wear
4. Dual signal format compatibility reduces spare parts module type inventory quantity
5. Hot-swappable rack design minimizes production downtime during module maintenance replacement
6. Balanced cost-performance ratio for non-safety critical general process control loops

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 actuator wiring uses shielded twisted pair copper cables, cable shield grounded only at DCS cabinet grounding terminal
4. Maintain minimum 15 cm separation distance between analog output cables and high-power variable frequency drive 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. Execute hot swap module replacement only after setting all associated field actuators to manual local control mode
2. Conduct quarterly output signal calibration using certified 4–20 mA signal calibrator to maintain ±0.1% FS accuracy
3. Avoid routing analog output cables alongside arc welding equipment or high-voltage switchgear
4. Do not connect load resistance below 100 Ω to any 4–20 mA output channel to prevent short-circuit protection continuous tripping
5. Update module firmware exclusively via official Metso DNA DCS configuration software
6. Clean terminal block contact surfaces every 6 months to remove conductive dust causing output signal drift errors