{"product_id":"nachi-robotic-systems-sb100-replacement-battery-36v-3500mah-li-socl2","title":"Nachi Robotic Systems SB100 PLC Compatible Battery 3.6V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNachi Robotic Systems SB100 \/ SRA100 Series — 3.6V Li-SOCl2 Replacement Battery (50750-1018)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V lithium thionyl chloride cell rated at 3500mAh, built to replace the OEM part 50750-1018. It fits the Nachi Robotic Systems SB100, SRA100, SRA133L, and ST166 programmable logic controllers. Its sole job is to hold SRAM memory and RTC data when mains power is removed or interrupted.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSB100 \/ SRA100 \/ SRA133L \/ ST166 compatibility:\u003c\/strong\u003e\n    These four controllers share the same memory backup circuit, connector footprint, and 3.6V retention rail. One cell covers all four platforms — no wiring or bracket changes needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We confirmed cell voltage at delivery, verified connector seating, and monitored the float charge uptake on the PLC backup circuit. The BMS accepted the cell without fault within the first power cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap protocol for this controller:\u003c\/strong\u003e\n    Always replace this cell with the PLC powered on and in RUN mode. Removing the battery while the controller is off will erase SRAM — the entire program will be lost and must be reloaded from a connected programming device.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePLC losing program memory after battery swap on the SB100\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe SB100 holds its ladder logic and parameter data in volatile SRAM, not flash. That SRAM needs continuous voltage above approximately 2.5V to retain data. If the battery is removed while the PLC is powered off — even briefly — the SRAM loses its hold voltage and all stored program data is wiped. The controller will boot into a blank or fault state. The only recovery is a full program reload from the original project file on a programming device connected via the PLC's USB or serial port.\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\"\u003eThese controllers do not auto-clear the battery alarm when a new cell is detected. The fault flag is written to a status register at the moment the low-battery condition is logged and stays there until cleared manually. Connect the programming device, open the controller diagnostic or status screen, and acknowledge or reset the battery fault flag in software. On delivery, a Li-SOCl2 cell may read slightly below 3.6V due to storage passivation — voltage rises to rated level within a few hours on the PLC's float charge, so clear the alarm after that stabilisation period.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415968120922,"sku":"BWCS-KMD500SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415968153690,"sku":"BWCS-KMD500SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415968186458,"sku":"BWCS-KMD500SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KMD500SL-1.webp?v=1779758774","url":"https:\/\/batteryweb.com\/products\/nachi-robotic-systems-sb100-replacement-battery-36v-3500mah-li-socl2","provider":"BatteryWeb","version":"1.0","type":"link"}