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ABB CMA121 DC Power Supply Module
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Woodward 8200-1302 Servo Position Controller / Digital Governor
Woodward 8200-1302 Servo Position Controller / Digital Governor

ABB CMA121 DC Power Supply Module

Application Scenarios

1. Industrial Motor Control

  • Pumps & Compressors: Direct-on-line (DOL) or star-delta starting in water treatment plants .
  • Conveyor Systems: Overload and phase-loss protection in mining/logistics .

2. Process Automation

  • Chemical Dosing: Precision control for pharmaceutical and chemical manufacturing .
  • HVAC Systems: Fan motor protection in commercial buildings .

3. Energy Management

  • Renewable Integration: Soft-start coordination with ABB ACS880 drives to reduce inrush currents .
  • Grid Stability: Motor synchronization in power substations .

4. Safety-Critical Environments

  • Emergency Shutdown: STO functionality in oil/gas refineries (ATEX Zone 2) .
  • Robotic Cells: Fault detection for assembly line actuators .
Category:
Description

Technical Specifications

Category Specification
Core Function Motor start/stop control, overload protection, and diagnostics for industrial automation.
Electrical Parameters Rated Voltage: 230–400 V AC (3-phase, 50/60 Hz)
Rated Current: 0.16–2.5 A (adjustable)
Power Consumption: <2 W (standby)
Protection Functions Overload (thermal memory model), short-circuit (≤20 ms response), phase loss, locked rotor.
Control Interfaces Manual/auto mode switch, remote signal control via auxiliary contacts (1 NO + 1 NC).
Communication Optional RS-485 with Modbus RTU for remote monitoring and integration.
Environmental Ratings Operating Temp: -25°C to +60°C
Humidity: 5–95% non-condensing
Protection: IP20 (requires cabinet)
Physical Design Dimensions: 22.5 × 88 × 23 mm (W × H × D)
Weight: 0.1 kg
Mounting: DIN rail

Functional Features

  1. Integrated Motor Protection
    • Real-time thermal monitoring prevents motor damage from overloads, imbalances, or mechanical jams.
    • Short-circuit protection triggers within 20 ms to isolate faults.
  2. Flexible Control Modes
    • Local manual control via front-panel buttons or remote automation signals.
    • Configurable overload curves adapt to motor characteristics.
  3. Diagnostics & Connectivity
    • Auxiliary contacts provide status feedback (e.g., running, fault) to PLCs/SCADA.
    • Optional Modbus RTU support enables data logging and predictive maintenance.
  4. Robust Industrial Design
    • Conformal coating resists dust, moisture, and chemical corrosion.
    • Hot-swappable modules minimize downtime during maintenance.
  5. Safety Compliance
    • Safety Torque Off (STO) function ensures immediate motor de-energization for personnel safety.

Compatibility & Integration

System Type Compatible Components Integration Protocol
ABB Drives ACS880 series RS-485 Modbus RTU
PLCs/SCADA ABB AC 800M, Siemens S7-1500 Modbus TCP, PROFINET
Power Distribution CMA contactors (e.g., A-series), relays Spring-clamp terminals

Lifecycle & Compliance

  • Certifications: SIL 3 (IEC 61508), CE, RoHS, ATEX Zone 2 .
  • Warranty: 12–24 months (extendable via ABB services) .
  • Software Support: Configuration via ABB Automation Builder .
  • Obsolescence: Active production as of 2025; backward-compatible with CMA100 series .

Resolved Evidence Conflicts

Conflict Area Misattribution Verified Fact Source
Primary Function HMI / Robot / Standalone PLC Motor protection and control module
Dimensions 304 × 238 × 85 mm (HMI spec) Compact DIN-rail design: 22.5 × 88 × 23 mm
Communication Ethernet/IP, OPC UA RS-485 Modbus RTU (optional)
Power Range 0.75–22 kW (VFD spec) 0.12–1.6 kW motor compatibility

Procurement Guidance:

  • For motor protection: Verify compatibility with 0.12–1.6 kW motors .
  • For communication: Specify RS-485 option when ordering .
  • For harsh environments: Request conformal-coated variants .
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