The Siemens 6EW1861-3BA is a power supply unit belonging to the SINUMERIK 800 series of Siemens. Here are the detailed specifications:
- Manufacturer: Siemens
 - Product Series: SINUMERIK 800
 - Product Type: Power supply
 
- Input Voltage: 230V AC, 50/60Hz
 - Output Voltages and Currents: +5.1V/15A, +15V/0.5A, -15V/0.5A
 - Efficiency Rating: Approximately 98%
 - Load Regulation: ±0.5%
 
- Weight: Approximately 0.5 kg
 - Dimensions: Not precisely specified in the available reliable sources
 
- Operating Temperature Range: -20°C to +50°C
 - Protection Class: IP20
 
This power supply is designed to provide stable power outputs for the SINUMERIK 800 CNC system. It features an advanced voltage regulation system to maintain precise voltage levels even under fluctuating input conditions and has over - voltage protection for the input side.