{"product_id":"giddings-and-lewis-digital-io-board-501-03855-00-502-03064-00-0226-692","title":"Giddings and Lewis Digital I\/O Board 501-03855-00 \/ 502-03064-00","description":"\u003cp\u003eUsed in Giddings and Lewis CNC machining centers and horizontal boring mills, the 501-03855-00 Digital I\/O Board is a dual-section printed circuit board assembly designed for machine control applications. The board carries PCB number 502-03064-00 and is dated 7\/83 RB, indicating a July 1983 production revision. Each of the two mirrored board sections provides 16 individually numbered I\/O channels (0 through 15), with dedicated fuse positions labeled FU1-0 through FU1-15, LED status indicators for each channel, and screw terminal blocks for field wiring connections. IC components and resistor networks are populated throughout, and both sections are labeled INPUT and OUTPUT, confirming bidirectional signal routing capability. The board is formatted for rack or chassis mounting consistent with Giddings and Lewis control system architecture of the era. The assembly number 501-03855-00 is the OEM identifier used in active US surplus market listings; the PCB number 502-03064-00 is the underlying board identifier. The board is part of the Giddings and Lewis legacy control platform, which was used extensively in large-format CNC horizontal boring mills and machining centers in industrial and aerospace manufacturing environments. This assembly is stored in anti-static packaging as shown. Compatible Giddings and Lewis machine models and control generations should be verified against the applicable electrical service documentation before installation.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-692\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48898413166832,"sku":"m00692","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/FE6AFFDD-94ED-4982-B8EF-A2656A0148DA.jpg?v=1772056776","url":"https:\/\/mroexchange.com\/products\/giddings-and-lewis-digital-io-board-501-03855-00-502-03064-00-0226-692","provider":"MRO Exchange","version":"1.0","type":"link"}