{"product_id":"honeywell-51303968-100-pm-apm-cmos-backup-board","title":"Honeywell 51303968-100 PM APM CMOS Backup Board","description":"\u003ch2\u003eHoneywell 51303968-100 PM\/APM CMOS Backup Assembly Board\u003c\/h2\u003e\n\u003cp\u003eConfigured for preserving volatile system configuration data in Honeywell Process Manager (PM) and Advanced Process Manager (APM) Standard Power Systems, the \u003cstrong\u003eHoneywell 51303968-100\u003c\/strong\u003e (\u003cstrong\u003e51303968-100\u003c\/strong\u003e CMOS Backup Assembly Board) provides direct physical\/electrical execution for memory retention and battery charge monitoring across process control networks.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e51303968-100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.45 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e50 x 30 x 10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSystem backplane powered (3.6 VDC battery circuit execution)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoard Category\u003c\/td\u003e\n\u003ctd\u003eCMOS Battery Backup Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Compatibility\u003c\/td\u003e\n\u003ctd\u003eRechargeable Nickel-Cadmium (NiCd) battery system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Fuse\u003c\/td\u003e\n\u003ctd\u003e0.5 A time-delay fuse onboard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Position\u003c\/td\u003e\n\u003ctd\u003eLower right-hand backpanel connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol and Power System Isolation\u003c\/h3\u003e\n\u003cp\u003eIn Honeywell DCS architectures, the power subsystem maintains clean continuous voltage rails to prevent memory corruption during utility transfer cycles. The \u003cstrong\u003eHoneywell 51303968-100\u003c\/strong\u003e incorporates dedicated charging and failure-alarm monitoring circuitry that isolates volatile CMOS storage nodes from main bus power drops. Channel-to-channel isolation across adjacent backplane signal paths ensures that battery charging pulses and diagnostic monitoring signals do not induce high-frequency ripple into neighboring analog input cards running sensitive 4-20 mA HART loop protocol lines.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What physical disassembly steps are required to access and replace the board on the chassis backpanel?\u003c\/p\u003e\n\u003cp\u003eA: Technicians must first isolate supply power, then slide out the right-hand power supply module to reach the lower right-hand corner of the power-system backpanel chassis where the dedicated mating connector resides.\u003c\/p\u003e\n\u003cp\u003eQ: How does the onboard battery monitoring circuit alert the control system to backup failure?\u003c\/p\u003e\n\u003cp\u003eA: The board continuously samples battery terminal voltage and charge current. If the battery voltage drops below operational thresholds or the charging current fails, the circuit triggers a dedicated failure contact on the backpanel bus to alert the system alarm manager.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eAlign the card edge with the dedicated connector on the lower right-hand side of the power system backpanel. Seat the assembly straight into the connector pins without rocking to prevent pin bending, then secure all mechanical retention fasteners.\u003c\/p\u003e\n\u003cp\u003eEnsure the system ground braid connects securely to the cabinet chassis earth bus to establish a low-impedance ground path before re-engaging primary AC power feeds. Verify that the onboard 0.5 A time-delay fuse remains intact prior to closing the cabinet. Before performing board insertion or battery replacement, switch off main circuit breakers or confirm that the local area meets non-incendive hazardous location safety standards.\u003c\/p\u003e","brand":"HONEYWELL","offers":[{"title":"Default Title","offer_id":51284181909816,"sku":"51303968-100","price":250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/51303968-1001.jpg?v=1761547925","url":"https:\/\/www.automodulexpert.com\/products\/honeywell-51303968-100-pm-apm-cmos-backup-board","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}