Description

6EW1861-3BA – Siemens SINUMERIK 800 Series Power Module
6EW1861-3BA is a multi-output industrial power module specifically designed for the Siemens SINUMERIK 800 numerical control system. It belongs to the older 6EW1 series and has been discontinued. It is used to provide stable direct current power supply for the CNC system motherboard and I/O boards.

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Core Product Information
Brand: Siemens
Model: 6EW1861-3BA
Series: 6EW1 / SINUMERIK 800
Status: Discontinued
Input: 230 VAC, 50/60 Hz
Output:
+5.1 VDC / 15 A (main logic power supply)
+15 VDC / 0.5 A
-15 VDC / 0.5 A
Weight: Approximately 0.5 kg

Version: Version C
Application Object: SINUMERIK 800 Numerical Control System
Common Alternatives: Match with modern SITOP or 840D power supply according to system model Main features
Special power supply for CNC system: Specifically designed for SINUMERIK 800, featuring three isolated voltage stabilizing outputs, suitable for the requirements of CNC motherboards and analog circuits.
Compact rail installation: Standard industrial computer card structure, directly inserted into the back panel of the 800 series chassis, with simple wiring.
Industrial-grade protection: Built-in overvoltage, overcurrent, and short-circuit protection, suitable for strong interference environments in machine tools, enhancing system stability.
Long-term durability: Wide temperature design, low ripple output, suitable for 24/7 continuous operation, commonly found in old lathes, milling machines, and machining centers. Typical application
SINUMERIK 800 numerical control system (for lathes, milling machines, machining centers)
Old model CNC control cabinet: supplies power to the motherboard, spindle cards, and I/O cards
Industrial machine equipment renovation / spare parts replacement: maintenance spare parts for discontinued equipment