The ABB CMA 121 (3DDE300401) DC Power Supply Module is a compact, high-performance DC/DC converter engineered for distributed control systems (DCS) and automation environments. Designed for reliability and precision, this module ensures stable operation even under fluctuating input conditions.
Technical Specifications
Model Number:CMA 121 (3DDE300401)
Manufacturer: ABB
Module Type: DC Power Supply Module
Input Voltage Range: 18–32 VDC (24 V nominal)
Output Voltage: 5 VDC ±1%
Output Current: Up to 4 A (20 W max)
Efficiency: >85%
Ripple/Noise: <50 mV peak-to-peak
Isolation: 500 VDC input-to-output
Weight: 0.54 kg
Dimensions: 2.8 × 18.5 × 12.8 cm
System Compatibility: DCS
Origin: Sweden
HS Code: 8537101190
Condition: Brand New
Lead Time: In Stock
MOQ: 1
Key Features
High efficiency with low ripple for sensitive digital circuits
Strong isolation barrier for enhanced safety and reduced ground loop risks
Compact footprint suitable for motor control panels and automation cabinets
Wide input tolerance for unstable power sources or long cable runs
Application Scenarios
Motor control systems requiring stable 5 VDC supply
Distributed control architectures with multiple modules
Industrial automation panels exposed to variable power conditions
FAQ
Q: Is the ABB CMA 121 suitable for legacy DCS systems? A: Yes, the module is designed for compatibility with ABB’s DCS platforms and supports integration into both legacy and active systems.
Q: What makes this module reliable in harsh environments? A: Its 500 VDC isolation and low ripple output ensure stable operation even in electrically noisy or unstable power conditions.
