devices and jumpers is not detected. Not all legacy Johnson Controls; controllers
support the EOL termination attribute. Figure 18, Figure 19, and Figure 20 show
different scenarios, how the FIT should be configured, and what EOL switches are
monitored.
On an SAB, the minimum requirement is that the EOL termination must be enabled
on at least one device on the bus, and because a SAB supervisor (a controller like the
FEC or VMA) always has EOL termination enabled, this requirement is always met;
however, for enhanced bus performance, it is preferable to have EOL termination
enabled on the devices at each end of the SA Bus.
FIT Connection, EOL, and Shield Grounding Scenarios
Figure 1. FIT Connection, EOL, and Shield Grounding Scenarios One and Two
In scenario one, shown in Figure 18, the following is occurring:
The FIT is in place of an NAE.
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