JB400 Intelligent Junction Box for FOUNDATION fieldbus, Profibus-PA
The JB400 offers spur protection against short circuits (between + and – terminals), limiting the short circuit current in each spur. During a short circuit situation there is no effect in the other spur or the main trunk. There is a LED to indicate short circuits and JB400 has an integrated bus terminator in the models F and P.
In normal operation, each short circuit protector consumes less than 3 mA. After removing the short circuit, the spur goes back to normal operation, the protection circuit is disabled and the LED is dimmed.
