.1    Stand-Alone Panels (SAPs)

       .2   Provide a means to ensure communication integrity. Provide detail of your system with proposal.

       .3   To prevent damage to the system each data highway line shall be provided with a means of isolation,
             either optically or by some other means.  Provide detail of you protection system with proposal.

       .4   Upon failure of the network to communicate information from one SAP to other SAPs, retain the last
             legitimate value of each point in the SAPs that require it, and continue to control the systems based on
             those values. Failure of any SAP, or any part of a SAP on the network, shall not affect the ability of the
             network to communicate among the remaining SAPs.

      .5    Each physical or virtual point shall have a user-definable, unique, system-wide logical point mnemonic.
             The format of this point mnemonic shall conform to BCBC Point Naming Convention. All point functions
             such as commands, overrides, trends, reports, logs and graphics shall only need to use this unique logical
             point mnemonic.

        For systems which include terminal unit controllers (TUC's).

        .1    TUC's shall be considered to be any panel connected to a sub-communication network, where access
               to the features and points of the TUC is only obtainable through the SAP to which the sub-network is
               connected. TUCs shall have a limited number of inputs and outputs, which are specifically designed to
               control one component serving a single thermostatic zone (e.g., VAV terminal unit, dual-duct terminal
               unit, fan-coil unit, zone heat pump, etc.).