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ABB SDCS-PIN-21 Power Interface Card 

1. Key Parameters

• Product Model: SDCS-PIN-21
• Order Code Reference: Typically paired with ABB ACS VFD accessory kits (e.g., 3ABD00032089 for ACS880-01, 3ABD00032092 for ACS580) for procurement consistency
• Product Series: ABB ACS880/ACS580 VFD Internal Power Distribution & Isolation Cards
• Core Function: Distributes regulated power to VFD internal components; isolates main power from low-voltage control circuits; monitors power supply health (overcurrent/undervoltage); provides fault signals to VFD control system
• Input/Output (I/O) Specifications:

  Interface Type	Details	Key Performance Metrics
  Power Inputs	- Primary: 24V DC (from VFD internal power supply; nominal); 18~30V DC (wide range) - Auxiliary: 110/230V AC (optional, for external fan; selectable via DIP switch)	Primary Input Current: 5A (max); Auxiliary Input Current: 1A (max)
  Power Outputs	- Control Board: 24V DC, 2A (for SDCS-CON-2/3 control boards) - Cooling Fan: 24V DC, 1.5A (for W2E200 series fans) - I/O Modules: 24V DC, 1A (for DSTDW series I/O units) - Auxiliary: 24V DC, 0.5A (for external sensors)	All outputs regulated to ±2% tolerance; Overcurrent protection at 120% rated current

• Electrical Safety & Isolation:
  • Isolation Level: 2kVrms (between primary power input and low-voltage outputs; between AC auxiliary input and DC outputs)
  • EMC Immunity: Compliant with IEC 61000-6-2 (industrial environment); ESD Protection: ±8kV (contact), ±15kV (air); Surge Protection: ±2kV (contact discharge)
  • Protection Functions: Overcurrent (output >120% rated current), undervoltage (input <18V DC), overtemperature (>70℃); all trigger fault signal to VFD control board
• Mechanical Specifications:
  • Form Factor: PCB assembly (custom fit for ACS880-01/ACS580 VFD internal chassis)
  • Dimensions (W×H×D): 120mm × 80mm × 25mm (thin profile for dense VFD internal layouts)
  • Mounting: Screw-mounted (secures to VFD chassis via 2 M3 screws; no backplane required)
  • Weight: Approximately 150g
  • LED Indicators (board edge):
    • Power (PWR): Green (24V DC input normal); Red (input undervoltage/overvoltage)
    • Output Status (OUT1~OUT4): Green (corresponding output active); Red (output overcurrent)
    • Temperature (TEMP): Green (board temp <50℃); Amber (50℃~70℃ warning); Red (>70℃ protection)
    • Fault (FLT): Red (general fault; latches until reset via VFD)
• Environmental Ratings:
  • Operating Temperature Range: -20℃~+60℃ (-4℉~140℉)
  • Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
  • Humidity Tolerance: ≤95% RH (non-condensing, 40℃; suitable for damp industrial settings)
  • Vibration Resistance: 10~500Hz, 1.2g acceleration (IEC 60068-2-6; no solder joint failure)
  • Shock Resistance: 15g acceleration (11ms duration, IEC 60068-2-27; maintains structural integrity)
• Compliance Standards: IEC 61800-5-1 (adjustable speed drives), EN 61000-6-2 (EMC immunity), UL 508C (industrial safety), CE, RoHS

2. Key Features

• ABB ACS VFD Exclusivity: Custom-engineered for ACS880-01 (low-power) and ACS580 VFDs—form factor, power ratings, and connector pinouts match VFD internal layouts; eliminates compatibility risks (e.g., incorrect voltage to control board) common with generic power interface cards.
• Dual Power Input Support: Integrates 24V DC primary input (for core VFD components) and optional 110/230V AC auxiliary input (for external cooling fans)—adapts to diverse VFD installation scenarios (e.g., 230V AC for factory grids, 24V DC for battery-backed systems).
• 2kVrms Electrical Isolation: Isolates high-voltage auxiliary input (110/230V AC) and main power from low-voltage outputs (24V DC for control board/I/O)—prevents ground loops and voltage transients (common in industrial grids) from damaging sensitive VFD electronics.
• Precision Power Regulation: All 24V DC outputs are regulated to ±2% tolerance, ensuring stable power for VFD control boards (e.g., SDCS-CON-2) and I/O modules—avoids erratic VFD behavior (e.g., unexpected shutdowns) caused by voltage fluctuations.
• Fast Overcurrent Protection: Overcurrent triggers at 120% of rated output current (e.g., 2.4A for control board output) with <5ms response time—isolates faulty components (e.g., shorted cooling fan) to prevent cascading damage to the VFD.
• Compact Thin-Profile Design: 25mm thickness fits in tight ACS VFD internal spaces (e.g., between control board and chassis)—maximizes internal VFD layout efficiency without compromising power distribution capability.
• Intuitive Fault Diagnostics: Color-coded LEDs for input power, outputs, temperature, and general faults enable technicians to quickly identify issues (e.g., overcurrent in fan output) during VFD maintenance—cuts troubleshooting time by up to 30%.

3. Application Fields

• ABB ACS880/ACS580 VFD Internal Power Distribution: Primary application—powers core VFD components:
  • Manufacturing Automation: Distributes power in ACS880-01 VFDs driving 5kW~50kW conveyor motors; 24V DC output supplies the SDCS-CON-3 control board (for motor speed control) and cooling fan (for IGBT thermal management)—ensures continuous conveyor operation in automotive assembly lines.
  • Water & Wastewater Treatment: Powers ACS580 VFDs for 3kW~30kW water pump motors; auxiliary 230V AC input drives external cooling fans (for outdoor VFD enclosures), while 24V DC output feeds I/O modules (for pump pressure sensor signals)—maintains reliable pump control in damp treatment plants.
• HVAC System VFD Power Management: Supports VFD-driven HVAC equipment:
  • Commercial Building HVAC: Distributes power in ACS580 VFDs for 7.5kW~22kW air handler fans; 24V DC output supplies the VFD control board and room temperature sensor I/O—stable power regulation ensures consistent fan speed, optimizing building energy efficiency.
  • Industrial Chillers: Powers ACS880-01 VFDs for 15kW~45kW chiller compressor motors; overtemperature protection (>70℃) triggers if VFD internal heat rises, preventing compressor shutdown due to power card failure—critical for maintaining process cooling in electronics factories.
• Light Industrial VFD Applications: Enables reliable power for small-to-medium VFDs:
  • Food & Beverage Processing: Distributes power in ACS580 VFDs for 2.2kW~15kW mixer motors; 2kVrms isolation prevents ground loops from factory washdowns, while overcurrent protection safeguards the VFD from mixer overloads—complies with food safety hygiene standards.
  • Electronics Production: Powers ACS880-01 VFDs for 5kW~37kW SMT machine conveyor motors; precise ±2% voltage regulation ensures stable control board operation, avoiding SMT component placement errors caused by VFD voltage fluctuations.

4. Precautions

• ABB ACS VFD Compatibility: Use exclusively with ABB ACS880-01 (0.75kW~160kW) and ACS580 VFDs. Never install in high-power ACS VFDs (e.g., ACS880-04) or non-ABB systems—electrical mismatches (e.g., output current capacity, connector pinout) will damage the card, VFD control board, or internal components.
• Electrical Safety:
  • Full Power Disconnect: Before installing or servicing the card, disconnect the VFD from main power and discharge the DC bus (wait 10 minutes for ACS880-01, 15 minutes for ACS580)—auxiliary AC input (110/230V) and DC bus voltage pose shock risks; never handle the card while the VFD is energized.
  • Proper Grounding: Ensure the card’s ground terminal is securely connected to the VFD chassis (resistance ≤0.5Ω)—poor grounding reduces isolation effectiveness and increases EMI susceptibility, leading to output voltage noise.
• Wiring & Load Limits:
  • Wire Gauge Compliance: Use 0.75mm²~1.5mm² (18AWG~16AWG) copper wire for 24V DC outputs; undersized wires cause voltage drops (>2% tolerance), while oversized wires cannot fit in board terminals—verify wire gauge against ABB VFD wiring diagrams.
  • No Overloading Outputs: Do not exceed rated output currents (e.g., 2A for control board, 1.5A for fan); overloading triggers fault protection and may damage the card’s power regulation circuits—use external relays for high-current auxiliary devices (e.g., 2A+ sensors).
• Input Voltage Selection:
  • DIP Switch Setting: If using the auxiliary 110/230V AC input, set the DIP switch to match the input voltage (110V or 230V) before powering on—incorrect settings (e.g., 110V switch for 230V input) will destroy the card’s AC-DC converter, voiding the warranty.
  • Input Voltage Monitoring: Ensure primary 24V DC input stays within 18~30V DC; undervoltage (<18V) causes control board communication loss, while overvoltage (>30V) damages the card’s voltage regulators.
• Environmental & Maintenance Care:
  • Temperature Limits: Avoid operating above +60℃ or below -20℃—high temperatures (>60℃) reduce voltage regulation accuracy, while low temperatures (<-20℃) increase component latency, slowing fault response.
  • Dust & Moisture Protection: Install the VFD in a dust-tight, waterproof enclosure (IP54 or higher) in harsh environments—dust accumulation on the card’s circuits increases thermal resistance, triggering overtemperature warnings; moisture causes terminal corrosion.
• Maintenance Checks:
  • Quarterly Visual Inspection: With the VFD powered off, check LED indicators (all should be off when unpowered) and terminal connections—tighten loose screws (to 0.8 N·m for M3 screws) and remove dust with compressed air (low pressure, no moisture).
  • Fault Reset: After resolving a fault (e.g., overcurrent fan replacement), reset the card via the VFD’s front panel or ABB Drive Composer Pro—do not force reset without identifying the fault root cause (repeated resets may mask underlying issues like wiring shorts).
  • Voltage Testing: Annually measure output voltages with a calibrated multimeter—ensure 24V DC outputs are within ±2% (23.52V~24.48V); drift beyond this range indicates voltage regulator degradation, requiring card replacement.

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