Completely power down the legacy controller and disconnect the backup battery.
OnGuard software must be licensed and configured for the LNL-3300 series. Lenel Lnl-3300-m5 Installation Manual UPD
Unscrew and remove the legacy M5/M3000 CPU (e.g., E, P, PX, PXN, or PXNplus) and the CASI Power/Comm Board (PN: 110064001). Insert LNL-3300-M5 Completely power down the legacy controller and disconnect
The board is designed to retrofit into legacy CASI M5/M3000 enclosures. Lenel Lnl-3300-m5 Installation Manual UPD