Scenario 2: small expansion - Metasys - LIT-12012005 - Field Device - N2 Controller - 13.0

Modernization Guide for N2 Controllers - Metasys

Product name
N2 Controller
Document type
User Guide
Document number
Revision date

In this scenario, your customer is planning to remodel their space, subdivide or rearrange existing space, or expand their facility. As a result, their plan requires adding to their BAS either new equipment or existing equipment that was not previously connected to the BAS.

Option 1

If only one or two new controllers are needed as additions to an existing N2 bus, you should consider adding N2-capable equipment controllers and configure them for the N2 protocol. Any DX-9100 product should be replaced with DX-FAC-ADAPTER products.

Option 2

If many new controllers are needed, you should consider modernizing their BAS to use BACnet MS/TP. This option involves replacing the N2 only supervisor with a BACnet supervisor, adding N2-capable equipment controllers to operate the new or existing equipment, and configuring the N2-equipment controllers for BACnet MS/TP protocol.

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 the 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 network engine could be switched to BACnet MS/TP.

Note: If the existing N2 supervisor also supports managing BACnet MS/TP networks, then the supervisor may not need to be replaced.