Available. The Heidenhain MC 420 is a main computer unit designed for Heidenhain's iTNC 530 and ManualPlus 4110 CNC control systems. It features a 400 MHz Intel Celeron processor, 512 MB RAM, and interfaces including Ethernet, USB, RS-232-C/V.24, and RS-422/V.11. The MC 420 supports up to five position encoder inputs (1 VPP or EnDat 2.1) and offers three analog inputs (±10 V) and three PT100 inputs. It is compatible with Heidenhain's HDR hard disk containing NC software and requires a System Identification Key (SIK) for enabling control loops and software options. The MC 420 is housed in a compact enclosure measuring 300 mm x 100 mm x 300 mm and weighs approximately 4.2 kg.