Lambda / TDK / EMI EMS200

The TDK-Lambda EMS200 series is a programmable DC power supply engineered for test, measurement, and industrial applications demanding high power density and stable output. These units deliver reliable DC power across wide input voltage ranges while meeting stringent EMI/EMS standards. Built-in constant voltage and constant current operation with automatic crossover, combined with pulse-by-pulse current limiting and comprehensive protection mechanisms, makes the EMS200 suitable for complex system integration requiring precise power delivery and fast transient response.

## Technical Specifications

**Input & Output:**
• Input voltage: Single-phase (100-240 VAC, 170-265 VAC) and three-phase (208 VAC, 400 VAC) options
• Frequency: 47-63 Hz
• Output voltage regulation (CV mode): <0.1% for 100% load change
• Output current regulation (CC mode): <0.1% for 100% load change (full load to short circuit)
• Line regulation: <0.1% in both CV and CC modes across input range
• Stability (8-hour period): ±0.05% under constant line, load, and temperature
• Temperature coefficient — voltage: 0.02%/°C; current: 0.03%/°C
• AC inrush current: Limited to less than full load current via standard soft start
• Power factor: ~0.9 (typical, higher power models)
• Efficiency: ~85%
• Output switching frequency: 240-260 kHz (series-dependent)

**Protection & Thermal:**
• Overvoltage protection (OVP): Up to 300 VDC, adjustable on front panel (select models)
• Overcurrent protection: Pulse-by-pulse current limit with fast recovery
• Short circuit protection: Standard
• Thermal protection: LED indicators for thermal events
• Phase loss & neutral loss detection: Incorporated in three-phase models above 208 VAC
• Transient protection: Included
• Operating temperature: 0°C to 70°C continuous; 1%/°C derating above 50°C

## Key Features

• Active power factor correction for reduced input current and heat dissipation
• Automatic CV/CC crossover with seamless mode transition
• Wide input voltage acceptance minimizes transformer requirements
• High-frequency switching (240-260 kHz) reduces component size
• Front-panel adjustable protection thresholds on select models

## Typical Applications

• Manufacturing test stands requiring stable, programmable power
• Industrial power conditioning in EMI-sensitive environments
• System integration with automated control interfaces
• High-density telecom and data center power distribution

## Compatibility & Integration

Versatile programmability and multi-input voltage options support integration into diverse system architectures. Automatic protection modes and thermal management enable extended operation without manual intervention.