Metso AI8H D201189

Technical Specifications

• Analog Input Channel Count: 8 independent galvanically isolated analog input channels
• Supported Standard Signal Type: 4mA ~ 20mA two-wire loop-powered transmitter signals
• Channel Isolation Rating: 500V DC channel-to-backplane galvanic isolation
• A/D Conversion Resolution: 16-bit high-precision analog-to-digital converter per channel
• Conversion Sampling Rate: 100ms per full 8-channel scan cycle
• Measurement Accuracy: ±0.1% full scale at 25°C ambient temperature
• Backplane Bus Interface: FL1F proprietary high-speed digital expansion bus
• Module Power Supply: 24VDC backplane bus power feed; no external auxiliary power required
• Module Power Consumption: 4.2W maximum full channel load
• Operating Temperature Range: 0°C ~ +55°C
• Storage Temperature Range: -40°C ~ +85°C
• Relative Humidity: 5% ~ 95% RH non-condensing
• Protection Class: IP20 DIN rail mounted enclosure
• Physical Dimensions: 110mm (W) × 130mm (H) × 72mm (D)
• Net Weight: 0.48kg
• Certifications: CE, UL 508, IEC 61010-1 process control certified

Functional Features

1. 8 fully isolated analog input channels eliminate cross-channel signal interference from field transmitters
2. Built-in loop power supply for two-wire 4–20mA transmitters; no external field power sources required
3. Digital signal filtering algorithm with user-adjustable averaging window to suppress field electrical noise
4. Channel fault detection logic: open-circuit transmitter wire break diagnostic flag output to main controller
5. Hot-plug compatible expansion bus; module replacement without full system power shutdown
6. Channel scaling configuration via main FL1F CPU; linear and square-root flow signal scaling supported
7. Front panel individual channel LED status indicators for power, active signal and wire break fault
8. Supports maximum 12 expansion modules cascaded to single FL1F CPU base unit

Working Principle

Material & Structural Composition

• Module Housing: Black flame-retardant polycarbonate plastic DIN rail housing
• Signal Terminals: Spring-clamp copper terminals with anti-vibration locking mechanism
• Internal PCB: Multi-layer FR4 printed circuit board with conformal silicone coating
• Isolation Components: High withstand voltage miniature isolation transformers per channel
• Indicator Hardware: High-brightness surface-mount SMD LED channel status lights

Advantage Highlights

1. 8-channel high-density design reduces total cabinet I/O module quantity and space occupation
2. Integrated channel galvanic isolation eliminates need for external signal isolator barriers
3. On-board loop power supply removes separate 24V field power distribution wiring
4. Hot-swap hardware design enables maintenance without full process system shutdown
5. Built-in wire break diagnostic function reduces field transmitter fault troubleshooting time
6. Digital averaging filter suppresses VFD-induced analog signal noise in factory automation environments

Applicable Industries

Installation Mandatory Requirements

1. Mount only on standard 35mm DIN rail inside IP54 rated electrical control cabinet
2. Install module directly adjacent to FL1F master CPU base unit via backplane expansion bus connectors
3. Separate analog field signal wiring from high-current AC power cabling by minimum 15cm distance
4. Field transmitter wiring must use shielded twisted pair cable with single-point cabinet ground termination
5. Maximum operating altitude 1000m; reduce module sampling speed 8% per 1000m elevation over threshold

Operation & Maintenance Precautions

1. Conduct annual channel calibration with precision 4–20mA signal generator to maintain measurement accuracy
2. Avoid module installation location adjacent to heat-generating contactors and power resistors
3. Do not hot-swap modules during active process control critical production cycles
4. Regularly inspect spring terminal clamp tension to prevent loose wiring-induced signal drift
5. Storage environment must exclude corrosive sulfur, ammonia and salt fog atmospheric conditions