SA Bus - Metasys - LIT-12011034 - General System Information - Metasys System - Release 11.0

MS/TP Communications Bus Technical Bulletin

Brand
Metasys
Product name
Metasys System
Document type
Technical Bulletin
Document number
LIT-12011034
Version
Release 11.0
Revision date
2022-02-07
Language
English

The SA bus connects NCEs, SNCs, CGMs, CVMs, CGEs, CVEs, FACs, FECs, and VMAs (equipment controllers) to endpoint devices, such as IOMs, XPMs, network thermostats, network sensors, and Johnson Controls Variable Speed Drives (VSDs).

On an SA bus, an NCE, SNC, CGM, CVM, CGE, CVE, FAC, FEC, or VMA is the bus supervisor. The SA bus is a private MS/TP bus that only supports those devices that can be defined using the Controller Configuration Tool (CCT) programming tool. The bus does not support bus segments (Figure 1). See SA Bus rules and specifications for more information.