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MITA-Teknik WP-LINE 351 COMBI-1 (9780351) Wind Power Dedicated Combined I/O Module
Developed by Denmark-based MITA-Teknik (now owned by Emerson), this high-density multi-functional I/O module is specially designed for 1.5MW~5MW wind turbine generators. As a core component of the WP4x00 control system, it integrates 26 DI channels + 16 DO channels + 8 AI channels + 4 AO channels + 10 temperature inputs + 4 high-speed counting channels and dual serial port communication. It supports redundant power supply, hot swapping, wide temperature range (-40℃~+70℃) and IP20 protection rating. It holds CE/UL/CSA/RoHS/EAC certifications and complies with air freight regulations (no built-in lithium battery). Part No.: 9780351 (MK II upgraded version: 978035102).
- Definición del código del modelo
| Sección | Código | Descripción |
| Logotipo de la marca | MITA‑Teknik | Professional Danish wind power control brand, acquired by Emerson in 2018 |
| Código de serie | WP‑LINE 351 | 3rd-generation wind power I/O module platform; 351 stands for combined I/O |
| Tipo de función | COMBI‑1 | Multi-functional combined I/O (Digital + Analog + Temperatura + High-speed Counting) |
| Order Number | 9780351 | Modelo estándar (MK II version: 978035102) |
| Version Mark | Ninguno / MK II | None = 1st generation; MK II = 2nd generation with optimized hardware |
Full Model Definition: MITA-Teknik WP-LINE 351 series combined I/O module integrated with digital, cosa análoga, temperatura, high-speed counting and communication functions. Standard order number is 9780351, compatible with WP4x00 wind power control system.
- Especificaciones técnicas básicas (2026 Manual oficial)
| Categoría | Especificación | Observaciones |
| E/S digitales | ||
| Entrada digital (DE) | 26 canales, 24VCC, sink/source type optional | ±36VDC overvoltage protection, input impedance: 10kΩ |
| Salida digital (HACER) | 16 canales, 24VDC/0.5A (Relay/Transistor optional) | Protección contra cortocircuitos, automatic overload recovery |
| High-speed Counting Input | 4 canales, máximo. 100kilociclos | Supports encoder A/B phase and pulse signals for rotational speed measurement |
| Analog I/O | ||
| Entrada analógica (AI) | 8 canales, 4‑20mA/0‑10V, 12-resolución de bits | Input impedance: 250Oh(actual)/1MΩ(Voltaje), exactitud: ±0,1% FS |
| Salida analógica (HACIA) | 4 canales, 4‑20mA/0‑10V, 12-resolución de bits | máx.. carga: ≤500Ω(actual)/≥10kΩ(Voltaje) |
| Temperature Input | 8-channel 3-wire PT100 (-200℃~+600℃) + 2-channel NTC thermistor | Measuring accuracy: ±0.5℃ (-50℃~+150℃) |
| Interfaz de comunicación | ||
| COM1 | RS232/422/485/SSI (software programmable switch) | Compatible with SSI encoder, Modbus RTU master/slave |
| COM2 | RS485 (Modbus RTU slave) | Connect third-party meters, converters and other peripheral devices |
| Autobús de plano posterior | WP‑BUS (2Mbps high-speed communication) | Auto identification and communication with WP4100/WP4200 controllers |
| Características eléctricas | ||
| Fuente de alimentación | 24VCC (19~30VDC, dual redundant power input) | Reverse polarity protection, 4kV surge suppression |
| Consumo de energía | ≤15W (full configuration) | Operating current ≤0.6A @24VDC |
| Isolation Level | 2.5kV between channels, 1.5kV between channel and ground | Compliant with IEC 61010‑1 safety standard |
| Físico & Parámetros ambientales | ||
| Dimensión (Ancho×Alto×Profundidad) | 22.5×100×120mm | Montaje en carril DIN estándar de 35 mm |
| Clase de protección | IP20 | Adecuado para instalación dentro de armarios de control. |
| Temperatura de funcionamiento | ‑40℃ ~ +70℃ | Adaptable to extreme wind power site environments |
| Temperatura de almacenamiento | ‑40℃ ~ +85℃ | For transportation and storage |
| Vibración & Resistencia a los golpes | 10~55Hz, 0.5mm double amplitude / 100m/s² | Compliant with IEC 60068‑2‑6/27 standards |
| Certificaciones | ||
| CE | EN 61010‑1, EN 61326‑1 | Certificado No.: CE2019‑MITA‑0035 |
| UL | UL 508, UL 61010‑1 | Certificado No.: E482976 |
| CSA | C22.2 No.14 | Certificado No.: LR765432 |
| RoHS | 2011/65/EU | Comply with RoHS 2.0 hazardous substance restrictions |
| CAO | TR CU 004/2011 | Customs Union certification for Russia, Kazajstán, etc.. |
- Full Series Model List (WP-LINE 351 Serie)
| Modelo | Número de pedido. | Function Configuration | Escenarios de aplicación |
| WP‑LINE 351 COMBI‑1 | 9780351 | 26DI+16DO+8AI+4AO+8PT100+2NTC+4 High-speed Counter | General wind turbine main control I/O expansion |
| WP‑LINE 351 COMBI‑1 MK II | 978035102 | Upgraded hardware, backward compatible, added diagnosis function | Wind turbine renovation & new unit standard configuration |
| WP‑LINE 351 COMBI‑2 | 9780352 | 16DI+24DO+4AI+8AO+4PT100+4 High-speed Counter | Applications focusing on output control |
| WP‑LINE 351 DIGITAL | 9780353 | 40DI+20DO+4 High-speed Counter | Pure digital control occasions |
| WP‑LINE 351 ANALOG | 9780354 | 16AI+8AO+16PT100 | Applications focusing on analog and temperature collection |
| WP‑LINE 351 COMM | 9780355 | 16DI+16DO+4AI+4AO+4 Serial Ports | Communication-intensive applications |
Selection Formula: Choose COMBI-1/2 for I/O ratio; select DIGITAL/ANALOG/COMM by type; MK II is upgraded version; identify models via 978035X; prioritize 351 series for wind power main control with redundant power and hot swap.
- Internal Replacement & Cross-Brand Equivalent Models
4.1 MITA Internal Replacement & Compatibilidad
| Modelo Original | Modelo de reemplazo | Descripción |
| WP‑LINE 350 COMBI | WP‑LINE 351 COMBI‑1 (9780351) | 350 series discontinued; 351 series with 30% performance improvement, totalmente compatible |
| 9780351 (1st Gen) | 978035102 (MK II) | Hardware optimization, added channel diagnosis, hot swap supported, no reprogramming needed |
| WP‑LINE 351 COMBI‑1 | WP‑LINE 351 COMBI‑1 + WP‑LINE 111 Módulo de potencia | Redundant power supply configuration to enhance system stability |
4.2 Cross-Brand Wind Power I/O Module Comparison
| Marca | Modelo | Equivalent Specification | Diferencias |
| TEJIDO | AC500‑IO‑CM579 | 24DI+16DO+8AI+4AO+8PT100 | 15% precio más alto, different communication protocol (Profinet) |
| siemens | ET 200SP AI 8xTC/AI 8xRTD | Dedicated analog & temperature module | Multiple modules required for full functions, mayor costo |
| Schneider | Modicon M340 BMXAMI0800 | 8-channel analog input | Not dedicated for wind power, insufficient wide-temperature performance |
| B&R | X20 AI 4622 | 4-channel analog input | Needs matching X20 system, incompatible with WP4x00 |
- Application Environments & Casos típicos
5.1 Escenarios aplicables
| Industria | Aplicaciones típicas | Ventajas |
| Generación de energía eólica | I/O expansion for 1.5MW~5MW wind turbine main control system | Integrate all signal types in one module, reduce quantity and wiring workload |
| Nacelle Control | Collection of wind speed, wind direction, vibration and temperature signals | Wide-temperature design adapts to harsh nacelle working conditions |
| Pitch System | SSI encoder position feedback and drive control for pitch motors | 100kHz high-speed counting ensures precise pitch angle control |
| Yaw System | Yaw motor control, position detection and limit protection | Fast digital output response with short-circuit protection |
| Hydraulic & Braking System | Hydraulic station pressure monitoring and brake control output | High analog accuracy 卤0.1%FS with output overload protection |
| Grid Monitoring | Grid-connected voltage, current and power signal collection | Compatible with Modbus RTU to connect power quality analyzers |
5.2 Non-Recommended Applications
Offshore wind power salt fog environment (IP65 rated modules are recommended)
High-current control over 0.5A (external contactors required)
Ordinary industrial control outside wind power industry (alto costo, general-purpose I/O is preferred)
Occasions requiring Profinet/EtherCAT high-speed Ethernet (only WP-BUS and RS485 supported)
5.3 Casos de aplicación típicos
Caso 1: 2.5MW Wind Turbine Main Control I/O Configuration
Configuración: WP4100 Controller + 2 sets WP-LINE 351 COMBI-1 (978035102) + 1 set WP-LINE 111 Módulo de potencia
Funciones:
- Collect signals from nacelle sensors including wind speed, wind direction, vibration and temperature
- Receive SSI encoder position feedback via 4 high-speed counting channels for pitch system
- Realize yaw motor, hydraulic station and brake control via 16 DO channels
- Monitor grid parameters including voltage, current and power via 8 AI channels
Ventajas: Support hot swap for maintenance without shutdown; automatic fault diagnosis for quick channel fault location; redundant power supply improves system availability.
Caso 2: Wind Turbine Pitch System Renovation
Configuración: WP-LINE 351 COMBI-1 (9780351) + Pitch Controller
Funciones: Replace old I/O modules to realize accurate pitch position control and status monitoring
Ventajas: Fully compatible with original WP4x00 system without controller replacement; newly added channel diagnosis function reduces maintenance time; SSI encoder support improves pitch control precision.
- Air Freight Compliance & Certificaciones
6.1 Air Freight Compliance Standard (IATA DGR 2026)
| Compliance Item | Result | Basis |
| Built-in Lithium Battery | Ninguno | Industrial electronic module with external 24VDC power supply, no battery components |
| Magnetic Substance | Non-dangerous goods | EMC compliant with IEC 61326‑1, magnetic field intensity ＜0.005mT |
| Shipping Category | General Cargo | No UN number, deliverable as standard electronic products |
| Packaging Standard | Anti-static bag + carton + foam cushion | Prevent pin damage and static electricity |
| Shipping Restriction | No special limits | Available for air, sea and land transportation, conform to international logistics standards |
6.2 Certification List with Numbers
| Proceso de dar un título | Standard No. | Número de certificado. | Coverage Area |
| CE | EN 61010‑1, EN 61326‑1 | CE2019‑MITA‑0035 | EU & EEA |
| UL | UL 508, UL 61010‑1 | E482976 | EE.UU & Canadá |
| CSA | C22.2 No.14 | LR765432 | Canadá |
| RoHS | 2011/65/EU | RoHS‑MITA‑2020‑0351 | Global eco-friendly markets |
| CAO | TR CU 004/2011 | EAC‑MITA‑2021‑351 | Rusia, Kazajstán, Bielorrusia, etc.. |
| Wind Power Industry Certification | IEC 61400‑1 | IEC‑WT‑2022‑0035 | Global wind power market access |
- Fallos comunes & Troubleshooting Guide
7.1 Fault Diagnosis Table
| Fenómeno de falla | Posibles causas | Inspection Steps | Soluciones |
| Module Communication Disconnection | 1. Loose backplane bus connection | 1. Check WP‑BUS connector locking status | 1. Re-plug and lock connectors |
| 2. Undervoltage power supply (<19VCC) | 2. Measure module input voltage | 2. Troubleshoot power module output | |
| 3. Wrong module address dial setting | 3. Confirm dial address (0‑15) | 3. Adjust dial code correctly | |
| 4. Controller firmware incompatibility | 4. Upgrade controller firmware to V4.0 or above | 4. Complete firmware upgrade | |
| No Digital Input Signal | 1. 24VDC power failure | 1. Measure terminal voltage | 1. Repair 24VDC power circuit |
| 2. Damaged input channel | 2. Test with spare channel | 2. Replace module or repair channel | |
| 3. Wrong wiring type (sink/source) | 3. Check module DIP switch setting | 3. Adjust DIP switch to match signal type | |
| 4. Input signal short circuit | 4. Measure input resistance (normal＞10kΩ) | 4. Eliminate short-circuit fault | |
| Analog Signal Drift & Abnormality | 1. Poor shield grounding | 1. Check single-point shielding grounding | 1. Reconnect shielding wire |
| 2. Failed channel calibration | 2. Execute channel recalibration | 2. Calibrate via MITA Tool software | |
| 3. Excessive power ripple | 3. Test power ripple value (＜100mV) | 3. Replace high-quality power supply | |
| 4. Temperatura ambiente fuera de rango | 4. Confirm operating temperature within -40℃~+70℃ | 4. Optimize heat dissipation | |
| Large Temperature Measuring Error | 1. Wrong 3-wire PT100 wiring | 1. Verify PT100 wiring sequence | 1. Wire strictly follow A/B/C definition |
| 2. Damaged compensation wire | 2. Test compensation wire resistance (＜1Ω) | 2. Replace compensation cables | |
| 3. Burnt channel | 3. Replace spare channel for test | 3. Repair or replace module | |
| 4. Strong on-site interference | 4. Keep away from frequency converters | 4. Add anti-interference measures | |
| No Digital Output Action | 1. Damaged output channel | 1. Measure output terminal resistance | 1. Replace module or repair channel |
| 2. Load short circuit | 2. Disconnect load for separate test | 2. Remove short-circuit load | |
| 3. Triggered overcurrent protection | 3. Power off and restart module | 3. Ensure load current ≤0.5A | |
| 4. Wrong output mode selection | 4. Confirm DIP switch setting | 4. Switch output mode correctly |
7.2 Daily Maintenance Suggestions
- Inspección periódica: Inspect module indicators, wiring tightness and heat dissipation every 6 meses
- Channel Calibration: Calibrate analog and temperature channels annually with MITA Tool
- Firmware Upgrade: Update module firmware every 2 years to ensure compatibility and safety
- Spare Parts Allocation: Prepare 1~2 spare modules for key wind turbines to shorten downtime
- Environment Control: Keep cabinet internal temperature between -40℃~+70℃ and humidity below 95%, clean dust regularly
- Información de pedido & Selección de accesorios
8.1 Order Numbers (2026 Official Price List)
| Nombre del producto | Número de pedido. | Observaciones |
| WP‑LINE 351 COMBI‑1 (Versión estándar) | 9780351 | 1st generation, without hot swap function |
| WP‑LINE 351 COMBI‑1 MK II (Upgraded Version) | 978035102 | 2nd generation with hot swap, preferred for new projects |
| WP‑LINE 111 Módulo de potencia | 9780111 | Redundant power supply, matched for 351 serie |
| WP‑BUS Extension Cable | 9723001 | Inter-module communication cable, optional length: 0.5m/1m/2m |
| Terminal Block Kit | 9723002 | Special wiring terminal for 26DI+16DO+8AI+4AO |
| MITA Tool Software | 9724001 | Software for module configuration, calibration and diagnosis |
8.2 Lista de accesorios
| Nombre del accesorio | Modelo | Función | Applicable Scene |
| Redundant Power Module | WP‑LINE 111 (9780111) | Dual 24VDC input, hot swap & automatic fault switching | Mandatory for high-reliability wind turbines |
| Signal Isolator | MTI‑ISO‑24 | 24-channel signal isolation against interference | Sites with severe analog signal interference |
| Protector contra sobretensiones | MTI‑SPD‑24 | 24VDC power surge protection, 4kV withstand | Wind farms in thunderstorm-prone areas |
| DIN Rail Mounting Bracket | MTI‑BRACKET‑35 | Firm module fixing with enhanced vibration resistance | Wind turbines with severe nacelle vibration |
| Label Marking Kit | MTI‑LABEL‑351 | Channel identification marking | All installation occasions |
- Selection Avoidance Guidelines
- Version Confirmation: Prioritize MK II version (978035102) for new projects with hot swap and diagnosis functions for easier maintenance
- I/O Quantity Matching: Select COMBI-1/COMBI-2/DIGITAL/ANALOG/COMM according to actual wind turbine design demands
- Communication Protocol Confirmation: Confirm external devices support RS485 and SSI to avoid protocol mismatch
- Power Supply Scheme: Adopt redundant power supply combination for wind power sites to improve system stability
- Adaptación ambiental: Add extra salt-fog-proof measures for offshore wind turbines; control temperature range for inland units
- Spare Parts Plan: Equip 1 spare module per key wind turbine, and allocate spare parts at 5:1 ratio for ordinary units
MITA-Teknik WP-LINE 351 COMBI-1 (9780351) is a mature and reliable combined I/O module widely used in wind power industry, featuring high integration, strong compatibility and easy maintenance. It is perfectly suitable for main control system I/O expansion of 1.5MW~5MW wind turbines. Focus on version type, I/O quantity, communication protocol and power supply scheme during model selection. Equipped with matched accessories, it can greatly improve the stability and operation & maintenance efficiency of wind turbine control systems.
