Application Details - Metasys - LIT 12014068 - Equipment Controller - BELIMO 6-way EPIV - 1.0

Generic SA Bus for BELIMO 6-way EPIV integration Application Note

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Document type
Application Note
Document number
LIT 12014068
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Johnson Controls Sensor Actuator (SA) Bus is a private BACnet MS/TP bus that connects Equipment Controllers to endpoint devices, such as IOMs, XPMs, network thermostats, network sensors, and variable speed drives.

The Generic SA Bus (GSAB) feature was created to allow for the integration of third-party devices into the Equipment Controllers using the proprietary Johnson Controls SA Bus. Most third-party BACnet devices are integrated into Metasys systems via the FC Bus of a supervisory controller. The GSAB feature now enables these devices to be locally integrated on the SA Bus of Equipment Controllers. This increases the total number of devices a BAS network can support on one supervisory controller and provides the ability to include third-party field devices as part of the Equipment Controller applications. Through GSAB integration Equipment Controllers can access the BACnet point data and perform read, write, command, reset detection, and device validation on connected third-party devices.

During the commissioning of an Equipment Controller, devices integrated using the GSAB feature are configured in a similar way to standard SA Bus devices.

This application note explains how to configure GSAB integration for BELIMO 6-way EPIV.

Figure 1. Devices Connected to Equipment Controller on SA Bus
Figure 2. Devices Connected to SNC Network Control Engine on SA Bus