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ABB CMA121 (3DDE300401) is a compact, Eurocard-format switching power supply unit belonging to the ABB SYNPOL D family, engineered for mission-critical industrial control systems. It converts a wide-range AC or DC input into a precision-regulated 24V DC output to power controller backplanes, I/O modules, and field termination assemblies in Symphony DCS and Advant Controller environments. The module uses high-frequency switching technology for high efficiency (>88% at full load) and low ripple, with built-in active inrush current limiting to prevent tripping on capacitive loads. An internal ORing FET enables seamless parallel operation for redundancy, while isolated alarm contacts provide fault signaling. Hot-swappable and CE/UL certified, it is a trusted choice for continuous process operations.

• Model: CMA121 | Part No.: 3DDE300401

• Series: ABB SYNPOL D, Symphony DCS, Advant Controller 410/450

• Type: Regulated DC Power Supply Module

• Input Voltage: 100–240V AC (50/60Hz) or 110–340V DC

• Output Voltage: 24V DC ±1%, low ripple

• Output Current: 5A continuous, 10A peak (10s)

• Efficiency: >88% at full load

• Protections: Overload, overvoltage, overtemperature, reverse polarity

• Redundancy: 1+1 parallel redundancy (external diodes)

• Hot-Swappable: Yes (insert/remove under power)

• Status Indicators: LED for input present, output OK, fault

• Isolation: Isolated alarm contact (changeover relay)

• Power Consumption: ~120W max

• Operating Temp: -25°C to +70°C

• Protection Class: IP20

• Dimensions (W×H×D): 125 × 160 × 110 mm

• Weight: ~0.6 kg

• Lifecycle: Active / Supported (legacy system critical spare)

• Wide Input Compatibility: Works with global AC/DC grids for universal deployment

• High Efficiency & Stability: Low energy loss, tight regulation, and low ripple for sensitive electronics

• Redundancy Ready: Enables 1+1 redundant configurations for zero downtime in critical processes

• Hot-Swap Capability: Replace without system shutdown, minimizing maintenance impact

• Comprehensive Protection: Shields against electrical faults, extending system lifespan

• Proven Reliability: Field-proven in power plants, refineries, and chemical facilities

• Easy Integration: Eurocard form factor fits standard subracks, simple front-panel mounting

• What is ABB CMA121 3DDE300401?It is a 24V DC regulated power supply module for ABB SYNPOL D, Symphony DCS, and Advant Controller 410/450 systems, offering 5A output, wide input, and redundancy.
• What systems is it compatible with?ABB SYNPOL D, Symphony DCS (S+ series I/O racks), and Advant Controller 410/450 backplanes.
• Does it support redundancy?Yes, two CMA121 modules can be paralleled for 1+1 redundancy using external blocking diodes.
• Is it hot-swappable?Yes, designed for insertion/removal under power without disrupting system operation.
• What is the input voltage range?100–240V AC (50/60Hz) or 110–340V DC, compatible with global industrial power grids.
• What protection features does it have?Overload, overvoltage, overtemperature, and reverse polarity protection, plus an isolated alarm contact for fault signaling.

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

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