{"product_id":"omron-cpm2c-replacement-battery-36v-450mah-li-socl2","title":"Omron CPM2C-BAT01 PLC Backup Battery 3.6V 450mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eOmron CPM2C — 3.6V Li-SOCl2 Replacement Battery (CPM2C-BAT01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V 450mAh lithium thionyl chloride cell that replaces the CPM2C-BAT01 in the Omron CPM2C PLC. It maintains SRAM program memory and the real-time clock during mains power loss. When the original cell depletes, the CPM2C can lose retained data and clock accuracy on the next power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCPM2C platform fit:\u003c\/strong\u003e\n    The CPM2C uses a dedicated backup cell on a 3.6V rail to hold SRAM and RTC state independently of the main power supply. This cell matches the original voltage rail, connector form factor, and current draw profile the CPM2C-BAT01 specifies.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against a CPM2C unit and confirmed the BMS accepted the new cell without fault flags on a live swap. Voltage held stable and the controller retained its program state throughout the exchange.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap requirement on the CPM2C:\u003c\/strong\u003e\n    Always replace this battery with the CPM2C powered on and in RUN mode. Removing the old cell while the controller is powered off collapses the SRAM voltage rail immediately — the program is gone before the new cell seats. If the PLC was off during the swap, reload the program from your programming device before restarting.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the CPM2C battery alarm stays active after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe CPM2C does not automatically clear its battery alarm flag when a new cell is installed. The alarm is a latched status bit in the controller — it persists until you clear it manually through CX-Programmer or the equivalent programming console. Connect to the PLC, navigate to the PLC status or error log section, and reset the battery alarm bit. If the flag reappears within 24 hours, check the cell is seated fully and the connector is making solid contact.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNew CPM2C-BAT01 cell reading below 3.6V on a multimeter\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-SOCl2 cells ship in a passivated state — a thin layer forms on the lithium anode during storage and suppresses open-circuit voltage. A fresh cell may measure 3.2–3.4V before it has seen any load or float charge. Once seated in a powered CPM2C, the passivation layer breaks down within a few hours and the cell rises to its rated 3.6V. If voltage has not recovered to at least 3.5V after 12 hours on a live controller, reseat the cell and verify connector continuity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415972937818,"sku":"BWCS-OPM200SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415972970586,"sku":"BWCS-OPM200SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415973003354,"sku":"BWCS-OPM200SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OPM200SL-1.webp?v=1779758774","url":"https:\/\/batteryweb.com\/products\/omron-cpm2c-replacement-battery-36v-450mah-li-socl2","provider":"BatteryWeb","version":"1.0","type":"link"}