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ABB SDCS-PIN-3A Power Interface Board 

1. Key Parameters

• Product Model: SDCS-PIN-3A
• Product Series: ABB SDCS-PIN Power Interface Boards (VFD High-Low Voltage Isolation, Compatible with ACS800 Series Drives)
• Core Function: Provides electrical isolation between high-voltage power circuits and low-voltage control systems; transmits power-related signals (current, voltage, status) between sections; distributes auxiliary power to drive monitoring components; detects power circuit faults (overcurrent, overvoltage)
• Electrical Specifications:

  Parameter	Details	Performance Metrics
  High-Voltage Interface	- Input Voltage Monitoring: 3-phase AC 380V~690V (line-to-line) - DC Bus Voltage Monitoring: 510V~960V DC - Current Sensing: Compatible with ABB current transformers (up to 500A primary) - Isolation Rating: 4kVrms (1min dielectric test between high-voltage and control circuits)	Safely monitors high-voltage power circuits while protecting low-voltage controls from transients
  Control Circuit Interface	- Control Voltage: 24V DC ±10% (from SDCS-FEX-2 power supply) - Signal Outputs: 4× analog (0~10V DC, 16-bit; proportional to current/voltage) - Status Signals: 8× digital (24V DC, optically isolated; for fault/alarm indicators) - Communication: SPI interface (to drive CPU board) for real-time data transmission	Transmits accurate power-related data to control system for monitoring and protection logic
  Signal Processing	- Sampling Rate: 10kHz (current/voltage signals) - Measurement Accuracy: ±0.5% (current); ±0.5% (voltage) - Filtering: 50/60Hz notch filter + low-pass filter (1kHz cutoff) for noise reduction	Ensures precise, noise-free measurement of power parameters (e.g., motor current) for drive control algorithms
  Protection Features	- Overcurrent Detection: Threshold adjustable (100%~150% of rated current); outputs fault signal in <1ms - Overvoltage Detection: DC bus overvoltage (adjustable threshold); outputs alarm signal in <1ms - Short-Circuit Isolation: Optically isolated signal paths prevent fault propagation - Thermal Shutdown: ≥90℃ (board temperature; disables signal transmission to prevent incorrect data)	Enables rapid fault response by drive CPU, protecting power components (IGBTs, rectifiers) from damage

• Mechanical Specifications:
  • Housing Material: FR4 glass-epoxy circuit board (UL94 V-0, flame-retardant); Polyimide insulation barriers (high-voltage isolation)
  • Dimensions (W×H×D): 140mm × 200mm × 35mm (mounts to drive internal frame via 4 M3 screws)
  • Mounting: Fixed installation in ACS800 drive power compartments; Requires ≥50mm clearance from high-voltage busbars
  • Weight: Approximately 300g
  • Connectors: 1× high-voltage terminal block (3-phase AC input); 1× DC bus connector; 2× current transformer connectors; 1× 24V control power connector; 1× 26-pin control signal connector (to CPU board)
  • LED Indicators:
    • Power (PWR): Green (24V control power normal)
    • HV OK (HV): Green (high-voltage circuits within safe range)
    • Fault (FLT): Red (overcurrent/overvoltage detected)
    • Signal (SIG): Green (signal transmission to CPU normal)
• Environmental Ratings:
  • Operating Temperature Range: -10℃~+70℃ (-14℉~158℉)
  • Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
  • Humidity Tolerance: 5%~95% RH (non-condensing, 40℃; suitable for industrial drive cabinets)
  • Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6; No isolation degradation or signal loss)
  • EMC Compliance: EN 61800-3 (industrial immunity); EN 55011 (Class A emissions) | Resists noise from drive inverters and motor cables |
• Compliance Standards: IEC 61800-5-1 (VFD safety), EN 60947-5-1 (low-voltage switchgear), UL 508C (industrial control), CE, RoHS, IEC 61140 (protective bonding)

2. Key Features

• 4kVrms High-Voltage Isolation: Provides robust electrical isolation between 380V~690V AC power circuits and 24V DC control systems—prevents high-voltage transients (e.g., IGBT switching surges) from damaging sensitive CPU and I/O components, enhancing drive safety and reliability.
• Precise Power Parameter Measurement: 10kHz sampling rate and ±0.5% accuracy for current/voltage signals—delivers real-time, high-fidelity data to the drive CPU for vector control algorithms (e.g., torque regulation) and protection logic (e.g., overload prevention).
• Integrated Signal Filtering: 50/60Hz notch filter and low-pass filtering reduce electrical noise—eliminates interference from drive inverters and motor cables, ensuring stable signal transmission even in high-noise industrial environments (e.g., steel mills, mining sites).
• Rapid Fault Detection (<1ms): Detects overcurrent and DC bus overvoltage in less than 1ms—enables the drive CPU to trigger protective actions (e.g., inverter shutdown) before power components (IGBTs) sustain damage, reducing repair costs and downtime.
• Seamless ACS800 Integration: Designed as a native component of ABB ACS800 drives—matches drive mechanical dimensions and connector pinouts, enabling plug-and-play replacement (≤30-minute installation) and ensuring compatibility with drive firmware and control logic.
• Dual Isolation Barriers: Polyimide insulation barriers between high-voltage and control sections—provide physical and electrical separation, complying with IEC 61140 safety standards for protection against electric shock in industrial environments.
• Wide Temperature Range (-10℃~+70℃): Operates reliably in harsh drive cabinet environments—withstands temperature fluctuations caused by drive power losses, eliminating the need for specialized cooling in most industrial applications.

3. Application Fields

• Industrial ACS800 VFD Systems: Primary application—power interface for ABB ACS800 drives:
  • Manufacturing Plant Drives: Enables safe communication between 480V AC power circuits and control systems in 100kW~500kW ACS800 drives for extruders and presses; precise current measurement ensures accurate torque control, while 4kVrms isolation protects operators during maintenance.
  • Mining Conveyor Drives: Interfaces with 690V AC power circuits in ACS800 drives for heavy-duty conveyors; rapid overcurrent detection (＜1ms) triggers shutdown during belt jams, preventing motor and drive damage in remote mining sites.
• Heavy Machinery Drives: Power interface for large industrial machinery:
  • Steel Mill Rolling Drives: Monitors 690V AC and DC bus voltage in ACS800 drives for rolling mill motors; filtered current signals enable stable vector control, ensuring uniform steel strip thickness, while isolation protects control systems from mill electrical noise.
  • Cement Kiln Drives: Transmits power data between 400V AC circuits and control systems in ACS800 drives for kiln rotation motors; wide temperature tolerance (-10℃~+70℃) withstands heat in kiln-side drive cabinets, maintaining reliable operation.
• Energy & Utility Drives: Power interface for utility-scale equipment:
  • Power Plant Pump Drives: Isolates 690V AC power circuits from control systems in ACS800 drives for boiler feedwater pumps; accurate voltage monitoring ensures stable operation during grid fluctuations, while fault signals integrate with plant SCADA for alarms.
  • Wind Turbine Converter Drives: Interfaces with variable-voltage power circuits in ACS800 converters; rapid overvoltage detection protects IGBTs during grid faults, while filtered signals enable precise power conversion control.
• Marine & Offshore Drives: Power interface for marine applications:
  • Ship Propulsion Drives: Provides isolation between 440V AC ship power and control systems in ACS800 marine drives; humidity tolerance (95% RH) withstands marine environments, while vibration resistance (1g) handles ship motion.
  • Offshore Platform Compressor Drives: Monitors power parameters in ACS800 drives for offshore compressors; 4kVrms isolation ensures safety in explosive atmospheres (when used with ATEX-certified enclosures), preventing ignition risks.

4. Precautions

• Drive Compatibility (Critical): Use exclusively with ABB ACS800 series VFDs—Never install in non-ABB drives (e.g., Siemens SINAMICS) or older ABB models (e.g., ACS600); incompatible high-voltage ratings or connector layouts will cause immediate failure or safety hazards. Verify drive model against SDCS-PIN-3A specifications.
• Installation & High-Voltage Safety:
  • Power Isolation: Disconnect all drive power (3-phase AC input + DC bus) and discharge capacitors (wait ≥15 minutes) before installation—high-voltage terminals (380V~690V AC) pose lethal shock risks. Confirm voltage ≤50V DC with a multimeter before handling.
  • Isolation Barrier Protection: Do not remove or damage polyimide insulation barriers—breaching isolation barriers reduces safety rating (＜4kVrms), increasing risk of high-voltage transfer to control circuits and electric shock.
  • Torque Specifications: Tighten high-voltage terminal screws to 2.5 N·m and control connectors to 1.0 N·m—under-tightening causes high resistance (overheating), while over-tightening strips threads (loose connections and arcing). Use a torque wrench for accuracy.
• Calibration & Configuration:
  • Current Transformer Matching: Ensure current transformers (CTs) match drive rated current—using undersized CTs causes measurement inaccuracies (e.g., 100A CT on 200A drive), leading to incorrect overload protection and potential motor damage.
  • Threshold Calibration: Set overcurrent/overvoltage thresholds via drive parameter settings (not adjustable on the board itself)—incorrect thresholds (e.g., overcurrent set too high) disable protection, while overly low settings cause nuisance tripping.
• Fault Handling & Maintenance:
  • Fault Diagnosis: A red FLT LED indicates overcurrent/overvoltage detection—check drive parameters for fault codes (e.g., "DC Overvoltage") to identify root cause (e.g., grid surge, motor short); do not reset without resolving the issue, as repeated faults damage power components.
  • Isolation Testing: Perform dielectric strength tests annually (4kVrms for 1min) to verify isolation integrity—degraded isolation (＜4kVrms) requires immediate board replacement to prevent safety hazards. Use a calibrated hipot tester and follow safety procedures.
• Environmental Limitations:
  • Temperature & Contamination: Keep drive cabinet temperature within -10℃~+70℃—temperatures above 70℃ trigger thermal shutdown, while dust accumulation on components increases leakage current (reducing isolation). Use filtered cooling fans and periodic compressed air cleaning.
  • Humidity & Corrosion: Avoid condensing humidity (install dehumidifiers in marine/offshore applications)—moisture causes corrosion on high-voltage terminals, increasing resistance and creating fire risks. Consider conformal coating for coastal or industrial environments.
• Replacement & Safety Compliance:
  • Genuine ABB Parts: Use only genuine ABB SDCS-PIN-3A boards—non-genuine alternatives often fail isolation tests (＜4kVrms) or have inaccurate measurements, violating safety standards and voiding drive warranties.
  • Post-Installation Testing: After replacement, verify all functions (signal transmission, fault detection) with a test load—ensure current/voltage readings match actual values (±0.5%) and fault triggers activate at set thresholds before returning the drive to service

The structure and details of the product：

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