Vivace Process Instruments

Fieldbus Bus Protector Profibus-PA and FOUNDATION ™ VBP10

Fieldbus Bus Protector Profibus-PA and FOUNDATION ™ VBP10 is a bus protector for Profibus-PA and FOUNDATION ™ fieldbus networks according to IEC 61158-2, which ensures that a short circuit generated in their spurs not propagate to other spurs and to the main trunk. In short circuit condition (between + and - signs + or shield) the spur opens, preventing the short circuit. For each spur there is a LED which is activated in the short circuit condition. From time to time, VBP10 checks for current flowing in the spur, and if there is current, it is activated again. After leaving the short-circuit condition, the spur back to work and the protection circuit is disabled, erasing the LED.

VBP10 has a LED to indicate that the module is powered and also an integrated bus terminator (BT). The Trunk Input has surge protector, ensuring greater safety to VBP10  and spurs. In normal operation, i.e. without short-circuit, each spur consumes less than 1 mA. Each spur has a maximum current of 40 mA.