Yokogawa PSCCM22AAN

Core Technical Specifications

1. Electrical Power Parameters
   • Input Supply Voltage: 85–264 VAC, 47–63 Hz universal industrial AC input
   • Working Consumption: Max 120 VA
   • Isolation Voltage: 2500 VAC between bus circuit and power circuit
2. Communication Performance
   • Main Bus Protocol: Vnet/IP (Yokogawa proprietary DCS bus)
   • Data Transmission Rate: 100 Mbps full-duplex
   • Auxiliary Communication Protocols: Modbus RTU, OPC-UA, EtherCAT expansion interface
3. Physical & Mechanical Parameters
   • Overall Dimensions: 160 mm (W) × 100 mm (H) × 100 mm (D)
   • Net Weight: 1.9 kg
   • Mounting Standard: Standard DCS rack card slot mounting, compatible with Yokogawa CENTUM series rack chassis
4. Environmental Operating Parameters
   • Operating Temperature Range: -20 ℃ ~ +70 ℃
   • Storage Temperature Range: -40 ℃ ~ +85 ℃
   • Relative Humidity: 5% ~ 95% non-condensing
   • Protection Grade: IP65 front panel, internal circuit IP30
   • Vibration Resistance: 10–150 Hz, 1.5 mm amplitude continuous operation
5. Certification Standards
   • Safety Certification: UL/cUL 508, IEC 61131-2, SIL 3 functional safety certification
   • Electromagnetic Compatibility: CE Class A industrial EMC standard

Function & Feature Highlights

1. High-performance embedded industrial processor with 16 GB DDR4 RAM and 512 GB solid-state storage, supports large-volume real-time process data cache and historical data temporary storage without data loss during brief power fluctuation.
2. Dual redundant Vnet/IP communication channels, automatic bus switching within 5ms when single channel fault occurs, realizing uninterrupted data transmission for critical process control loops.
3. Built-in comprehensive self-diagnostic logic: automatically detects communication bus disconnection, module power anomaly, internal circuit overheating, rack backplane contact failure; outputs fault alarm signals via front panel LED indicator and remote system alarm bus.
4. Multi-system compatibility: seamlessly matched with all Yokogawa CENTUM VP, CS3000, CS1000 DCS subsystems, supports mixed deployment of analog input/output modules, digital control modules and safety interlock modules in the same rack.
5. Hot-swappable design: allows module replacement under continuous system operation without shutting down the whole DCS rack, greatly reducing equipment maintenance downtime.

Material & Structural Composition

1. Outer Shell Material: High-strength flame-retardant ABS+PC alloy plastic, UL94 V-0 fire resistance rating, anti-corrosion and anti-aging performance suitable for chemical plant workshop environment.
2. Internal Circuit Substrate: High Tg FR4 copper-clad circuit board, multi-layer shielding copper foil between power layer and signal layer to eliminate electromagnetic crosstalk.
3. Connection Interface Components: Gold-plated spring-loaded backplane connectors (0.3μm gold plating thickness), anti-oxidation and low contact resistance for long-term plug-in service life.
4. Heat Dissipation Structure: Integrated parallel strip heat dissipation ribs on the module side panel, natural convection heat dissipation without auxiliary fan, zero mechanical wearing parts.

Working Principle

1. Data Input Stage: The module continuously receives multi-channel analog/digital process signal data transmitted from field I/O modules through rack backplane bus, carries out signal filtering, noise elimination and digital quantization conversion.
2. Data Processing Stage: The built-in high-speed processor executes DCS control logic calculation, process parameter threshold judgment, interlock condition detection, and packages processed real-time data according to Vnet/IP communication protocol format.
3. Data Transmission Stage: Packaged data is transmitted to upper-level operation monitoring consoles through dual redundant Vnet/IP bus; at the same time, operation control commands input by operators on consoles are received, parsed and forwarded to corresponding field control modules to realize closed-loop automatic process regulation.
4. Fault Diagnosis & Protection Stage: Real-time monitoring of internal circuit temperature, input power voltage and communication channel signal strength; once abnormal threshold is exceeded, internal hardware overcurrent/overvoltage protection circuit triggers power cut-off for sensitive chips, and fault code is uploaded to DCS operation screen for maintenance troubleshooting.

Application Scenarios

• Large-scale petrochemical refining, ethylene synthesis, chemical reaction furnace distributed control systems
• Thermal power plant, nuclear auxiliary facility boiler, turbine, water treatment DCS control cabinets
• Pharmaceutical sterile production line, food beverage continuous processing automatic control systems
• Natural gas transmission station, oil pipeline pressure flow monitoring and interlock control systems

Installation Requirements

1. Rack Installation: Insert the module into the designated standard card slot of Yokogawa DCS rack, push firmly until the backplane connector fully locks, tighten the two side fixing screws to prevent loosening caused by equipment vibration.
2. Environmental Installation Condition: Install DCS rack in indoor electrical control room with independent air conditioning, avoid direct sunlight, water splashing, corrosive gas and conductive dust accumulation around the module.
3. Wiring Specification: All external communication cables adopt shielded twisted-pair industrial bus cables; cable shielding layer single-point grounded at the control cabinet ground bar, grounding wire cross-section ≥ 2.5 mm² copper wire.
4. Rack Ventilation Requirement: Maintain at least 30 mm vertical ventilation gap between adjacent modules in the rack, do not block the side heat dissipation ribs of the module with cables or cable ties.

Usage & Maintenance Precautions

1. Static Protection: Wear anti-static wristband connected to cabinet ground bar before touching or disassembling the module; static electricity will permanently damage internal high-precision processor chips.
2. Hot Swap Operation Standard: Confirm the module to be replaced is not the only redundant communication node before hot swapping; complete replacement operation within 3 minutes to avoid single-channel long-term operation risk.
3. Regular Maintenance Inspection: Every 6 months, wipe module surface dust with dry anti-static cloth; check backplane connector for oxidation or loose contact; test dual bus redundant switching function via DCS maintenance software.
4. Prohibited Operation: Do not disassemble the module outer shell without professional Yokogawa maintenance authorization; do not input AC voltage exceeding 264 VAC or DC reverse voltage to power terminals; do not install the module in outdoor unenclosed control cabinets.
5. Storage Requirement for Spare Modules: Store spare modules in constant temperature (15–25 ℃) dry storage cabinet with anti-static packaging bag sealed; avoid long-term storage in high humidity or chemical corrosion environment.