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

Modernization Guide for N2 Controllers - Metasys

Brand
Metasys
Product name
N2 Controller
Document type
User Guide
Document number
LIT-12012005
Version
13.0
Revision date
2023-10-16
Language
English

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.