LYNGSO MARINE IOM402

Core Function Features

1. Mixed multi-channel signal acquisition: 16 opto-isolated digital input channels + 8 configurable analog input channels
2. Analog input universal compatibility: PT100 temperature probe, 4–20mA process signal, 0–10V voltage transducer signal
3. 8-channel digital output, configurable as relay contact output or transistor sinking output
4. Full-channel galvanic isolation between field circuit and internal control circuit to resist marine electrical interference
5. Marine anti-corrosion conformal coating on all PCB circuits against salt fog corrosion
6. On-board self-diagnosis for open sensor circuit, short circuit, module over-temperature fault
7. Dedicated internal marine system bus communication for data exchange with rack master controller
8. Front panel LED channel status indicators for rapid on-site fault troubleshooting
9. Support group signal interlock logic processing for ship safety protection

Technical Performance Parameters

• Nominal Power Supply: 24VDC marine standard, power consumption 7W
• Analog Input ADC Resolution: 12-bit
• Digital Input Rating: 24VDC dry contact opto-isolated input
• Analog Measurement Range: PT100 (-50°C ~ +200°C), 4–20mA, 0–10VDC
• Digital Output Load Capacity: Relay type 5A/250VAC; transistor type 0.5A/24VDC
• Operating Temperature: -10°C ~ +55°C (ship cabin environment)
• Anti-vibration Standard: IEC60068-2-6 marine vibration test compliant
• Salt Mist Resistance: ISO9227 500-hour salt spray test qualified

Material & Structural Characteristics

• Circuit Board: Multi-layer industrial PCB with full acrylic conformal coating for salt mist and moisture resistance
• Housing: Green flame-retardant plastic DIN rail mounting shell, anti-UV aging treatment
• Terminal Blocks: Green pluggable screw spring terminals, nickel-plated anti-corrosion copper contacts
• Mounting Form: Standard Eurocard 19-inch rack / 35mm DIN dual mounting compatible
• Dimensions: 120mm × 90mm × 45mm
• Net Weight: 550g

Working Principle

1. Ship field sensors (temperature, pressure, liquid level, valve position) transmit analog/digital signals into IOM402 isolation input circuit
2. Analog signals are converted to digital data via 12-bit ADC, temperature signals linearized by internal calibration algorithm
3. Processed signal data transmits to MCS2200 rack master controller through dedicated marine internal bus
4. Master controller sends control commands back to IOM402 digital output channels to drive marine valves, pumps, alarms and auxiliary equipment
5. Built-in fault detection circuit continuously monitors all channel circuit integrity, triggers front panel fault LED alarm when abnormal

Installation Requirements

1. Install inside ship dedicated electrical control cabinet, equipped with dehumidification heating device to avoid cabinet internal condensation
2. Separate power cables, analog sensor cables and digital control cables into different wiring trunking
3. All signal cable shielding layers single-point grounded to ship protective earth distribution board
4. Fix DIN rail mounting firmly with locking clips to resist hull navigation vibration and shock
5. Maintain 15mm ventilation gap around module to prevent heat accumulation in closed cabinet

Application Scenarios

• Cargo ship main engine temperature, pressure and vibration monitoring system
• Marine auxiliary boiler, cooling water pump, fuel pump automatic control
• Cabin bilge water level, fire detection, valve remote monitoring & control
• Offshore platform machinery safety interlock automation system
• Yacht and passenger ship environmental monitoring and HVAC control

Marine Special Operation Notes

1. Regularly inspect cabinet dehumidifier operation; condensation inside module will cause circuit corrosion failure
2. Use only marine certified shielded cables for all field sensor wiring
3. Quarterly tighten all terminal block screws; hull long-term vibration easily causes loose wiring
4. Do not deploy modules near ship exhaust pipelines with high temperature radiation
5. After long voyage in coastal saltwater area, inspect PCB conformal coating integrity every year, re-coat if peeling appears