Table 8: Status LEDs and descriptions of LED States
LED label LED color Normal LED state Description of LED states
SA BUS Green Blink - 2 Hz
Blink - 2 Hz = Data Transmission (normal communication)
Off Steady = No Data Transmission (N/A - auto baud not supported)
On Steady = Communication lost, waiting to join communication ring
Repair information
If a field controller fails to operate within its
specifications, replace the controller. For a
replacement controller, contact your Johnson
Controls representative.
FAC4911 Advanced Application Field Equipment Controller Installation Guide20
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