Johnson Controls IOM3731 Installation Manual page 9

Table 5: Status LEDs and descriptions of LED states
LED label LED color
SA/FC BUS Green
EOL
Amber
Termination details
A set of Johnson Controls termination diagrams provides
details for wiring inputs and outputs to the controllers.
Table 6: Termination details
Type of field device
Dry Contact (Binary Input) BI
Incremental Control to
Actuator (Switch Low,
Externally Sourced)
24 VAC Binary Output
(Switch Low, Externally
Sourced)
24 VAC Binary Output
(Switch High, Externally
Sourced)
Normal LED state Description of LED states
Blink - 2 Hz = Data Transmission (normal communication)
Blink - 2 Hz Off Steady = No Data Transmission (N/A - auto baud not supported)
On Steady = Communication lost, waiting to join communication ring
Off (Except on
On Steady = EOL switch in ON position
terminating
Off Steady = EOL switch in Off position
devices)
Type of Input/Output
BO
BO
BO
See the figures in this section for the applicable
termination diagrams.
Termination diagrams
IOM3731 Input/Output Module Installation Guide 9