{"product_id":"cutler-hammer-plc-511-replacement-battery-3v-2200mah-li-mno2","title":"Cutler Hammer PLC-5\/11 3V Replacement Battery B9758CH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCutler Hammer PLC-5\/11 Series — 3V Li-MnO2 Replacement Battery (B9758CH)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V lithium manganese dioxide cell rated at 2200mAh (6.6Wh), sourced to match the OEM spec for the Cutler Hammer PLC-5 series. It fits the PLC-5\/11, PLC-5\/20, PLC-5\/30, and PLC-5\/40 controllers. Its job is to hold SRAM program memory and keep the real-time clock running during mains power loss.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePLC-5\/11 through PLC-5\/40 compatibility:\u003c\/strong\u003e\n    These four controllers share the same battery compartment format, connector, and 3V SRAM retention rail. The BMS handshake is passive — no authentication challenge — so cell chemistry and voltage are the only match criteria that matter.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a PLC-5 bench unit and confirmed stable open-circuit voltage at 3.0V and consistent SRAM retention under simulated mains-off conditions. The cell held the memory threshold without BMS trip across the full test window.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap procedure — mandatory for this controller:\u003c\/strong\u003e\n    Always replace this battery with the PLC powered on and in RUN mode. Removing the cell while the controller is de-energised will erase SRAM contents instantly. If the PLC was off during the swap, a full program reload from the connected programming device is required before the controller can resume normal operation.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePLC-5 losing program memory after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe PLC-5 series stores its ladder logic in volatile SRAM, not flash. That SRAM needs continuous voltage from the backup cell — even a two-second interruption during swap is enough to wipe it. The only safe window to change the battery is while the controller is live and in RUN mode, with mains power supplying the backplane. If memory loss has already occurred, reconnect the programming terminal, reload the last saved project file, and perform a full download before attempting to restart the controller.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery alarm not clearing after a confirmed good installation\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe PLC-5 does not automatically clear a low-battery fault when a fresh cell is installed. The alarm flag is latched in the controller's status file and requires a manual reset through the programming software — typically by clearing the S:11 battery status bit in the processor status file using RSLogix 500 or an equivalent package. Physically seating a new cell does nothing to that flag on its own. Clear the bit, save the project, and confirm the fault indicator on the front panel extinguishes before closing out the maintenance record.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415972184154,"sku":"BWCS-PLC511SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415972216922,"sku":"BWCS-PLC511SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415972249690,"sku":"BWCS-PLC511SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PLC511SL-1.webp?v=1779758818","url":"https:\/\/batteryweb.com\/products\/cutler-hammer-plc-511-replacement-battery-3v-2200mah-li-mno2","provider":"BatteryWeb","version":"1.0","type":"link"}