Product Short Description
Product Brief
Rack-mounted digital I/O composite module under Metso ACN CS D2014 series; L suffix denotes extended cable anti-interference design for field digital switch signals over 100 m transmission distance, used for valve position feedback, pump interlock, and safety interlock signal acquisition.
Description
Technical Specifications
- Model Series: ACN CS D2014 Digital I/O Subseries
- Power Supply: 24 VDC ±10, power consumption 14 W
- Digital Input Channels: 16 NPN/PNP universal isolated DI
- Digital Output Channels: 8 relay contact DO (SPDT 5 A 250 VAC max load)
- Max Field Wiring Distance: 250 m shielded cable (L variant exclusive)
- Backplane Bus: Metso ACN internal high-speed bus
- Auxiliary Communication: RS485 Modbus RTU slave station interface
- Operating Temperature: -20 °C ~ +60 °C
- Storage Temperature: -40 °C ~ +85 °C
- Humidity: 5%–95% non-condensing
- Protection Class: IP20 module body, IP54 full rack assembly
- Dimensions: 220 H × 160 W × 35 D mm
- Net Weight: 0.81 kg
Functional Features
- 16-way isolated digital input with reverse polarity automatic protection
- 8-way high-capacity relay digital output with arc suppression circuit
- L-type full board EMC shielding for long-distance switch signal transmission
- Independent LED status indicator for each DI/DO channel on front panel
- Built-in interlock logic pre-processing hardware to reduce main controller load
- Complete hot-swap support for ACN rack system
- Overload short-circuit protection for all relay output channels
Performance Parameters
- DI Isolation Voltage: 1500 VAC channel-to-backplane
- Relay Output Mechanical Service Life: 10 million switching cycles
- DI Signal Response Delay: ≤ 0.5 ms
- Surge Withstand: 2 kV ESD, 4 kV EFT
- Vibration Resistance: 1–150 Hz, 1 g continuous operation
- DI Signal Recognition Threshold: 10 VDC low / 18 VDC high level
Material Composition
- PCB Substrate: FR4 high-temperature resistant industrial circuit board
- Relay Contacts: Silver alloy anti-oxidation contact material
- Shield Shell: 0.8 mm cold-rolled steel electrophoretic anti-corrosion coating
- Mounting Frame: Extruded black aluminum alloy with hard anodizing
- Connector Pins: Gold-plated phosphor bronze anti-oxidation terminals
Structural Characteristics
- Standard 1U dual-latch plug-in rack card structure
- Front panel split DI area / DO area independent LED indicator groups
- Rear gold finger connector for backplane bus docking
- Separate wiring terminal blocks for digital input and output field cables
- Double-layer internal isolation barrier between digital input and output circuits
Working Principle
Field switch digital signals enter isolated optocoupler input circuits, convert mechanical contact signals to digital logic levels and transmit to backplane bus. Main controller logic commands trigger internal relay drive circuits to switch external load equipment. The L-type multi-layer shielding structure suppresses induced interference on long-distance field cables; hardware interlock circuits execute fast safety signal logic without main controller latency.
Advantage Highlights
- Combined DI+DO integrated design reduces rack slot occupation quantity
- L-type long-distance anti-interference structure eliminates signal false triggering
- High-capacity relay outputs directly drive field valve solenoids and auxiliary contactors
- Channel independent short-circuit protection avoids full module shutdown under single-channel overload
- Hot-swap maintenance without system full power cut
- Compatible with all Metso Neles valve actuator position feedback signal standards
Applicable Industries
- Mining crushing & screening equipment interlock control
- Pulp mill rotary valve position feedback monitoring
- Petrochemical plant safety shutdown interlock signal collection
- Water treatment pump, gate valve digital status feedback
- Thermal power plant auxiliary machine interlock logic control
Installation Requirements
- Install inside standard Metso ACN CS 8/16-slot control rack
- Maintain 10 mm vertical ventilation gap between adjacent modules
- Field digital signal cables use shielded twisted pair, single-point cabinet PE grounding
- Cabinet grounding resistance ≤ 4 Ω to guarantee EMC shielding performance
- Verify backplane 24 VDC power stability before hot swapping modules
- Separate field power cable wiring from signal cable wiring inside cabinet
Operation & Maintenance Precautions
- ESD anti-static protection mandatory during module disassembly and wiring
- Regular quarterly cleaning of relay terminal blocks to remove conductive dust
- Replace relay assemblies when output switching cycle exceeds 8 million times
- Do not install adjacent to high-power inverter modules to avoid electromagnetic interference
- Spare modules stored in sealed anti-static bags with desiccant packs
- Cut off field load power before disassembling digital output wiring terminals
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