How is it that the card updates are not being activated? I am getting “ unknown card” and “ access denied” events?

Controller registries of last update entries are not registering- communication issue.
• Verify that you properly connected the RS485 line to each panel units and that no lines are crossed;
• Ensure that EOL ( End-Of-The-Line) resistors are property terminated on the RS485 network; and
• Visit U5, below for more information on network RS485 stability.