Giddings & Lewis Electronics Processor Module 501-03865-01

This Giddings and Lewis Processor Module, part number 501-03865-01 with secondary assembly number 502-03061-51, is a vintage CNC control board designed for use in Giddings and Lewis MPX series machine control systems. The board is silkscreened "PROCESSOR MODULE" and carries the primary assembly designation 501-03865-01 prominently on the component side.

The board features a multi-layer green PCB construction with gold-edge connector fingers on two sides, indicating a card-edge bus interface typical of rack-mounted industrial control architectures. Visible ICs include TTL logic devices, an 8284 clock generator, an 8288 bus controller, MC2661 and MC68661 serial communications controllers, AM26LS30 and AM26LS32 line drivers and receivers, and a CTS 10.000 MHz crystal oscillator. The silkscreen also identifies a serial port interface (CONN A), termination selection jumpers, and board test points.

This board is intended for technicians, machine rebuilders, or facilities maintaining Giddings and Lewis MPX series CNC equipment. It is sold as-is surplus. No testing, inspection, or functional verification has been performed or implied.

Stock # 0226-418-2