In this scenario, the customer has an N2-based BAS and has previously replaced legacy N2 controllers with N2-configured equipment controllers as part of an earlier replacement scenario. Now the customer is contemplating future risk and the cost and disruption of more legacy N2 controller replacements.
For example, one strategy could be to incorporate the installation of a network engine, configuring one trunk to the existing N2 and configuring the other to a new BACnet MS/TP. The BACnet trunk could then be run parallel with the existing N2 trunk and you can replace non-functional N2 controllers with BACnet MS/TP, or the remodeled area could be BACnet MS/TP while the existing un-renovated areas could remain N2. Then when the customer’s budget allows, the remaining N2 areas could be converted to MS/TP and the trunk 1 on the NAE/NCE or SNE/SNC could be switched to BACnet MS/TP.
Convert N2 systems to BACnet IP controllers if the customer views uplifting their facility to the latest technology as a future-proofing strategy for their building systems.
Use wireless field bus option. This option may not be cost effective as existing N2 bus wiring could be re-used for BACnet MS/TP when compared to the cost of the wireless hardware.