{"product_id":"giddings-and-lewis-servo-interface-circuit-board-502-03420-00-0226-537","title":"Giddings and Lewis Servo Interface Circuit Board 502-03420-00","description":"\u003cp\u003eThis listing is for a used Giddings and Lewis Servo Interface board, part number 502-03420-00, assembly drawing number 501-04306-00, Revision 1, dated 8\/87. This board is also referenced in some sources under the FIVES brand, which acquired the Giddings and Lewis machine tool product line. The board is described by the manufacturer as a PC Board Assembly, Servo Interface, and is confirmed discontinued by the original manufacturer.\u003c\/p\u003e\n\n\u003cp\u003eThe PCB silkscreen label reads \"SERVO INTERFACE\" and identifies both part numbers prominently. Signal labels visible along the edge connector include FDBK-1, FDBK-2, DRV-CMD, SIN-RES, COS-RES, SIN-IND, COS-IND, GND, and ZERO, indicating resolver-based servo feedback interface functionality. Additional labeled test points include QA1, QA2, QA3, and QA4. The board carries a BAL trimmer potentiometer and an Ohmite precision resistor (91J1R0, 10 ohm 1%) along with Dale RS-2C and RS-7 precision resistors marked 10 ohm 0.05%. Two power transistor packages are mounted at one edge via a heatsink bracket. The board uses a gold-finger edge connector for rack insertion.\u003c\/p\u003e\n\n\u003cp\u003eThis board is used in Giddings and Lewis CNC machine tool systems requiring resolver-based analog servo feedback interfacing.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-537\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856810422512,"sku":"m00537","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/196BD686-9B21-4D96-99C6-ACC28ABFC78B.jpg?v=1771630057","url":"https:\/\/mroexchange.com\/products\/giddings-and-lewis-servo-interface-circuit-board-502-03420-00-0226-537","provider":"MRO Exchange","version":"1.0","type":"link"}