{"product_id":"schneider-num-1020-replacement-battery-36v-1200mah-li-socl2","title":"Schneider LS14250-TSX NUM 1020 PLC Replacement Battery 3.6V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSchneider NUM 1020 \/ TSX17 Series — 3.6V Li-SOCl2 Replacement Battery (LS14250-TSX)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 1200mAh lithium thionyl chloride cell for Schneider NUM and TSX17 series PLCs. It maintains SRAM program memory and real-time clock data when the controller loses mains power. Fits NUM 1020, NUM 1040, NUM 1060, and TSX17 series controllers.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNUM and TSX17 platform fit:\u003c\/strong\u003e\n    These controllers share the same LS14250-TSX cell format, voltage rail, and connector footprint. The backup circuit draws from this cell the moment mains power drops, keeping SRAM contents and the RTC alive until power is restored.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against the NUM 1020 backup circuit. The BMS accepted the cell without fault, voltage held steady at 3.6V under the low standby draw, and the controller reported no memory loss after a simulated power interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap procedure — critical for this controller:\u003c\/strong\u003e\n    Always replace this cell with the PLC powered on and in RUN mode. Removing the old cell while the controller is off kills SRAM instantly. If the swap happened with power off, a full program reload from the programming terminal is required before restarting production.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the NUM 1020 loses its program after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe NUM 1020 uses SRAM for program and parameter storage — not flash. SRAM needs continuous voltage to retain data. The moment the backup cell is removed and the PLC is not powered, the SRAM voltage collapses and all stored data is gone in seconds. This is not a fault in the new cell. It is the expected behaviour of volatile memory with no power source present. The only recovery path is a full reload from the programming device.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery alarm still active after fitting a confirmed good cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn Schneider NUM and TSX17 controllers, the battery alarm flag does not clear automatically when a new cell is installed. The alarm is latched in software and must be reset manually through the programming terminal. Connect the programming device, navigate to the system status or fault register, and clear the battery alarm flag explicitly. If the alarm returns within 24 hours, check that the cell is seated fully and the connector has no corrosion on the contact pins.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415961370714,"sku":"BWCS-TSX170SL-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415961403482,"sku":"BWCS-TSX170SL-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415961436250,"sku":"BWCS-TSX170SL-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TSX170SL-1.webp?v=1779758652","url":"https:\/\/batteryweb.com\/products\/schneider-num-1020-replacement-battery-36v-1200mah-li-socl2","provider":"BatteryWeb","version":"1.0","type":"link"}