Rockwell Automation 1788-FBJB6 Foundation Fieldbus Junction Box Installation Instructions - Manual (Page 12)

12 FOUNDATION Fieldbus Junction Box
Rockwell Automation Publication 1788-IN006A-EN-P - September 2014
Operate the Junction Box
Reset Button
Press the Reset button on the front of the junction box to reset all indication of
trips on the device or trunk ports.
Term LED
A lit Term LED indicates that the junction box is terminated.
Device LEDs
Interpret the Device LEDs as follows:
Drop Trip
If the junction box detects that there is too much current being drawn on a drop
line, it will isolate that drop and keep the rest of the bus operating. The junction
box indicates which drop is in over-current protection by setting the drop LED
to constant red. Once the short/faulty device is removed the constant red will
blink OFF-RED, indicating that there was a fault. If the problem has been
rectified press the Reset button to remove the fault indication.
Device LED State Meainng
Off No current is being drawn. There is nothing on t he drop or the device is not
operational.
Green The device is operating in the allowed current band.
Red The drop is in over-current protection mode. The field device is faulty or the drop is
shorted.
Blinking off/red No current is being drawn, but the drop was previously in over-ciurrent
protection. This might indicate that the field device went faulty and then offline
or that a short has changed to an open circuit.
Blkinking green/red The device is operating in the allowed current band, but the drop was previously
in over-current protection. This might indicate an intermittent fault in the field
device or drop cable.