KONGSBERG RDIO401S 603432

Technical Performance Specifications

1. Total I/O Channel Quantity: 32 independent configurable digital input or digital output channels, each channel can be independently set as DI or DO mode via master control unit configuration software
2. Output Drive Type: Built-in mechanical dry contact relay for DO channels, each relay contact rated load: 5A @ 250VAC, 5A @ 30VDC
3. Communication Bus Interface: Dual redundant RBUS remote I/O process bus (RBUS A + RBUS B), galvanic isolation between communication bus and internal I/O circuit, isolation voltage 1000VDC
4. Power Supply Standard: Dual redundant 18–32 VDC marine DC power input terminals, built-in overvoltage, undervoltage, reverse connection and surge impact protection circuit
5. Channel Protection Performance: All solid-state I/O loops equipped with independent short-circuit automatic cut-off protection circuit; built-in loop open-circuit fault monitoring function for all channels
6. Operating Environmental Parameters
   • Operating Temperature Range: 0°C ~ +70°C
   • Storage Temperature Range: -40°C ~ +85°C
   • Vibration Resistance: IEC 60068-2-6 marine standard vibration resistance
   • Humidity Resistance: 5%–95% non-condensing relative humidity
7. Safety Rating: SIL 2 safety integrity level certified for marine safety systems
8. Physical Dimensions & Weight
   • Dimensions: 180mm (H) × 90mm (W) × 110mm (D)
   • Net Weight: 0.61kg
9. Protection Rating: IP20 indoor electrical control cabinet installation only

Core Functional Features

1. 32-channel High-density Configurable DI/DO: Each of the 32 channels can be independently configured as digital input for collecting field switch signals or digital output for driving relay contacts to control field equipment
2. Dual Redundant RBUS Communication Bus: Dual independent RBUS A and RBUS B bus channels; single bus channel failure will not interrupt data communication with RCU master control unit, automatic switchover to standby bus channel
3. Galvanic Isolation Between Communication Bus and I/O Circuits: 1000VDC isolation voltage eliminates electromagnetic interference crosstalk between bus communication signals and field I/O switch signals
4. Dual Redundant Power Supply Anti-failure Design: Two independent 24VDC power input terminals, recommended to connect two separate power distribution circuits; single power supply circuit failure will not affect normal module operation
5. Independent Channel Short-circuit Protection: Each solid-state I/O channel equipped with dedicated short-circuit protection circuit; automatic cut-off channel output current when short-circuit fault occurs, no damage to module internal circuits
6. Real-time Loop Fault Monitoring: Continuously monitor open-circuit, short-circuit and abnormal signal state of all 32 I/O channels; upload accurate channel fault location codes to RCU master control unit via RBUS bus
7. Communication Loss Fail-safe Output Logic: When RBUS bus communication with RCU master control unit is interrupted for more than 5 seconds, all relay output contacts automatically switch to pre-configured NO/NC fail-safe state to ensure field equipment safety
8. Built-in Comprehensive Module Self-test Function: Complete hardware circuit, bus communication and all I/O channel self-inspection automatically after power-on; real-time push module fault status to master control unit
9. Online Channel Configuration & Firmware Upgrade: All 32 channels DI/DO mode configuration can be modified online via RCU master control unit without module power-off; supports remote online firmware program upgrade through RBUS bus
10. Status LED Fault Indication: Front panel integrated power supply status LED, RBUS A/B bus running LED, general module fault LED; each I/O channel equipped with independent channel status LED to visually display channel signal state

Application Scenarios

1. Marine Engine Room Auxiliary Machinery Signal Collection & Control: Bilge pump, ballast pump, cooling water valve, fuel oil solenoid valve switch signal collection and relay drive control
2. Ship Safety Alarm System Field Signal Acquisition: Fire smoke detector, temperature sensor, gas concentration detector, high liquid level float switch digital signal centralized collection
3. Offshore Platform Deck Machinery Remote Control: Anchor winch, mooring winch, crane limit switch signal collection and indicator light, alarm horn relay drive control
4. Marine Dynamic Positioning System Auxiliary Field I/O Monitoring: Thruster cooling system, lubricating oil system pressure switch, temperature switch signal collection
5. Ship Inert Gas Safety Protection System Interlock Signal Processing: Oxygen concentration switch, pressure relief valve position feedback signal collection and interlock electromagnetic valve relay control

Material Composition & Structural Characteristics

1. Outer Shell Material: Lightweight high-strength flame-retardant ABS plastic shell, two sides equipped with vertical strip heat dissipation grooves to accelerate internal relay circuit heat dissipation, UL94-V0 flame retardant grade
2. Internal Circuit Board Material: Double-sided FR4 high-temperature resistant circuit board, relay drive circuits and bus communication circuits separately partitioned on circuit board to reduce signal crosstalk; all wiring pin terminals gold-plated to resist marine salt spray corrosion
3. Wiring Terminal Structure: Screw-type compression terminal blocks, power supply terminals, RBUS bus communication terminals and 32-channel I/O signal terminals partitioned on terminal base, clear printed channel number identification labels
4. Mounting Structure: Standard 35mm DIN rail card slot fixing, single-side locking buckle design to prevent module sliding under ship vibration
5. Front Panel LED Layout: Independent LED indicators for dual power supply channels, RBUS A and RBUS B bus channels, module general fault alarm; each of the 32 I/O channels equipped with small independent status LED to display channel on/off signal state in real time

Working Principle

1. Dual Redundant Power Supply Conversion Stage: Two independent 24VDC power input circuits supply power to internal circuit board; power conversion circuit converts input DC voltage into stable 24VDC relay drive power and 5VDC bus communication control power
2. RBUS Bus Data Transceiving Stage: Dual RBUS A and RBUS B bus channels receive channel configuration parameters and output control instructions sent by RCU master control unit; upload collected field digital switch signal data and channel fault status information to master control unit via RBUS bus
3. I/O Channel Signal Collection & Output Drive Stage
   • DI Mode: When channel is configured as digital input, internal signal acquisition circuit detects on/off state of field contact switches, converts switch state into digital signal and transmits to bus communication circuit for uploading to RCU master control unit
   • DO Mode: When channel is configured as digital output, after receiving control instructions from RCU master control unit via RBUS bus, internal relay drive circuit pulls in or releases built-in mechanical dry contact relay to control on/off state of field low-power actuators connected to relay contacts
4. Channel Fault Monitoring & Short-circuit Protection Stage: Dedicated monitoring circuits continuously detect signal loop state of all 32 I/O channels; short-circuit protection circuit automatically cuts off channel output current when channel short-circuit fault occurs; loop open-circuit fault information is uploaded to RCU master control unit in real time
5. Communication Loss Fail-safe Protection Stage: Internal bus communication monitoring circuit continuously detect data transmission heartbeat signal between module and RCU master control unit; when heartbeat signal loss exceeds 5 seconds, internal relay drive circuit automatically switches all relay output contacts to pre-configured fail-safe open/closed state to avoid field equipment out-of-control hazard
6. Power-on Self-test Stage: After power supply access, module automatically executes full hardware self-test program, sequentially inspects dual power supply circuits, dual RBUS bus communication circuits and all 32 I/O channel circuits; self-test fault information is uploaded to RCU master control unit immediately after detection

Installation Requirements

1. Installation Environment: Must be installed inside sealed IP54 and above electrical control cabinet; strictly prohibited open-air deck installation or direct contact with sea water, salt mist and oil vapor
2. DIN Rail Mounting Standard: Standard 35mm top-hat DIN rail horizontal installation; minimum 15mm heat dissipation gap between adjacent modules on left and right sides to ensure internal relay heat dissipation
3. Wiring Specification
   • Dual Power Supply Cable: Each power supply terminal uses independent 1.0–2.5mm² shielded marine control cable; two power supply terminals recommended to connect two completely independent power distribution circuits to realize power redundancy
   • RBUS Bus Communication Cable: Dual RBUS A/B bus wiring uses double-layer shielded twisted-pair cable; cable shielding layer single-point grounding at cabinet grounding busbar to eliminate marine electromagnetic interference
   • 32-channel I/O Signal Cable: Digital input/output wiring uses 0.75–1.5mm² shielded control cable; strong current power cables and weak current I/O signal cables use independent wiring trenches, minimum separation distance 8cm
4. Grounding Requirement: Module shell grounding terminal connected to cabinet protective grounding busbar with copper wire length less than 30cm, grounding resistance less than 4Ω
5. Pre-power-on RBUS Node Address Configuration: Adjust the 2-bit rotary address switch on the side of the module to set unique RBUS bus node ID; module only reads address value during initial power-on startup, address modification requires module power cycle restart to take effect

Operation & Maintenance Precautions

1. Power-on Operation Rules
   • Verify all wiring connections are firm and cable insulation resistance meets standard before power supply access; power terminal short-circuit test is prohibited
   • Power-on sequence: First supply dual power supply circuits of the module, wait for power-on self-test completion (module general fault LED off) before RCU master control unit issues channel configuration and output control instructions
   • Live plugging and unplugging of RBUS bus and I/O signal terminal plugs is prohibited; live operation will cause bus short-circuit and burn internal bus communication chips and relay drive circuits
2. Daily Maintenance Work
   • Monthly Inspection: Check front panel LED indicator status, confirm no persistent module fault or channel fault alarm lights; use dry soft brush to clean surface dust of two-side heat dissipation grooves, prohibit liquid cleaning agent contact with module shell
   • Quarterly Inspection: Tighten all screw terminal blocks to eliminate loosening risk caused by long-term ship vibration; measure voltage of two power supply circuits to ensure stable within 18–32VDC range; check RBUS bus communication status via RCU master control unit monitoring interface, confirm no continuous bus communication fault alarms
   • Annual Maintenance: Manually trigger full module self-test via RCU master control unit; back up module firmware program and 32-channel DI/DO configuration parameters to offline storage device for data backup
3. Fault Handling Forbidden Operations
   • When module general fault LED or any channel fault LED lights up, cut off both groups of module power supply circuits first before disassembling and inspecting internal circuit boards; live disassembly will cause electric shock hazard and irreversible internal circuit damage
   • Non-professional maintenance personnel are prohibited from disassembling the module shell and replacing internal relay components and circuit board chips; all faulty RDIO401S modules need to be returned to Kongsberg authorized service center for professional repair and channel function calibration
   • Random modification of communication loss fail-safe output state configuration parameters via RCU master control unit is prohibited; unauthorized parameter modification will lead to field safety interlock equipment out-of-control hazard
4. Spare Module Storage Standards
   • Spare RDIO401S modules stored in dry constant temperature warehouse, storage environment temperature -20°C ~ +40°C, relative humidity 10%–60% non-condensing
   • Modules sealed with anti-static packaging bags during storage, avoid placing together with corrosive chemical reagents and sea salt samples
   • Long-term stored spare modules need to be powered on and run full self-test for 1 hour every 6 months to prevent internal circuit board capacitor aging failure caused by long-term power-off storage