FC-BKM-0001 V1.1

The BKM-0001 design provides two independent batteries, one for each Control Processor, together with Force Enable and Reset key switches. Only one BKM is required in the controller chassis, including a redundant processor configuration. The FC designation identifies a conformal-coated type; retain the supplied V1.1 marking when matching the installed unit.

The non-rechargeable lithium batteries preserve diagnostics, the processor real-time clock and FTE IP addresses during loss of power. The design provides approximately three months of accumulated backup time. Battery condition and discharge history matter: use the specified battery type and follow the scheduled replacement and long-shutdown procedure.

The Reset key affects both Control Processor watchdogs and moves actual diagnostics into historical diagnostics. Force Enable OFF prevents forcing and removes active forces; ON permits software-controlled forcing. Removing the BKM removes active forces, so set Force Enable OFF before extraction and assess the resulting field behavior. The module indicator reports power-down, battery-related faults or normal operation.