{"product_id":"giddings-and-lewis-executive-control-board-501-04301-02-0226-547","title":"Giddings and Lewis Executive Control Board 501-04301-02","description":"\u003cp\u003eGiddings and Lewis Executive Control Board, PCB board number 501-04301-02, catalog assembly number 502-03415-02. This large-format, multi-layer circuit board is part of the Giddings and Lewis 8000 and 8000B CNC control system, identified as the Executive Control Board in the G\u0026amp;L 8000 nest backplane architecture. The board is silkscreened \"EXECUTIVE CONTROL BD.\" and carries the board number and catalog number in yellow silkscreen along the bottom edge, consistent with standard G\u0026amp;L 8000 board labeling conventions.\u003c\/p\u003e\n\n\u003cp\u003eThe board is populated with Zilog Z88C681CP\/40 dual UART ICs, multiple SBX expansion connectors along the left edge, oscillator modules, Texas Instruments logic ICs, and numerous labeled subassembly EPROMs including 502-52996-00, 502-52995-00, 502-52994-00, and 502-52993-01 revision codes. Date codes visible on components indicate manufacture in the late 1980s. The board also features two 88C681CP\/40 labeled CH1 and CH2 designators visible in photo 2.\u003c\/p\u003e\n\n\u003cp\u003eThis board is used as a direct replacement or spare for the Executive Control Board position in G\u0026amp;L 8000 CNC systems. Compatible catalog numbers for this board number per G\u0026amp;L documentation include 503-19029-00, 573-19030-00, M.1008.0502, M.1016.8802, M.1017.3434, and M.1017.3435. Compatibility should be verified against the specific machine control configuration prior to installation.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-547\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856887984368,"sku":"m00547","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/610ACD92-CE55-4C85-A42B-46FBC7A6576F.jpg?v=1771631361","url":"https:\/\/mroexchange.com\/products\/giddings-and-lewis-executive-control-board-501-04301-02-0226-547","provider":"MRO Exchange","version":"1.0","type":"link"}