VBP10

VBP10

Profibus-PA and FOUNDATION ™ Fieldbus Bus Protector

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.

Some segment protectors act as short circuit limiters, limiting the current in the range of 40 to 60mA per spur and in a short circuit situation, this current, depending on how the segment is sized, can shut it down (even more if more than one spur is in short circuir) due to excessive consumption and, consequently, to voltage drop.

The VBP10 uses the “FoldBack” technique, where in any situation that the spur consumes more than 48mA, it automatically shuts off the spur until the situation returns to normal. For this, it consumes less than 2mA per spur, which is an advantage over market segment protectors that maintain a permanent fault current, overloading the segment in case of multiple spurs short.

In addition, the VBP10 acts quickly, limiting the inrush current: when the Profibus-PA or Foudantion fieldbus device is powered, a large current flows and exceeds the current steady-state value. This current is called the inrush current. With the use segment protectors with low quality terminal blocks and in vibrating environments, some devices (due to poor contact on these terminal blocks or junction boxes) will turn off and on (contact peaks) and depending on the quality of the protection of this segment, the insrush current may be higher than the current supplied to the segment and "shut down" the bus or dramatically affect communication.

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.

Increase the availability and operational safety of your Profibus-PA or FOUNDATION ™ fieldbus  network.

Physical Medium / Protocol According to IEC 61158-2 / Profibus-PA /FOUNDATION™ fieldbus
Number of Spurs 4 and 8
Supply Voltage / Current Quiescent per Spur 9  to 32 Vdc / < 1.0 mA
Maximum Trunk current 4.0 A
Maximum Spur current 40.0 mA
Average Spur Current @ Short Circuit condition 12.0 mA
Maximum voltage drop per Spur 0.3V@20mA
Surge protector at the Trunk Input 1500 W, cut off level 62 V
LEDs indicators Green LED: On – Module powered; Off: Module not powered
 
Red LED: On – Spur protection is activated ;  Off: Spur protection is deactivated
Spurs connections Removable 3-pin terminal blocks, 2.5 mm²
Hazardous Certification Intrinsically Safe (pending)
Ambient Temperature Limits and Storage -40°C to 85°C
Relative humidity
0-95% non-condensing
Mounting DIN rail or junction box
Dimensions (mm) / Weight (g) VBP10-4: 125 x 90 x 56 (C x L x A) / 200 g – no Protection Housing
VBP10-8: 125 x 142 x 56 (C x L x A) / 400 g –  no Protection Housing
VBP10-4: 245 x 180 x 168 (C x L x A) / 2.6 kg –  Protection Housing
VBP10-8: 245 x 280 x 168 (C x L x A) / 4.0 kg –  Protection Housing<

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VIVACE PROCESS INSTRUMENTS

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Main Benefits:

  • Effective protection against short-circuit in Profibus-PA and FOUNDATION ™ fieldbus networks
  • Increase the availability of your Profibus-PA and FOUNDATION ™ fieldbus network
  • No user configuration
  • Facilitates maintenance during operation
  • According to IEC 611158-2
  • Models: 4 and 8 spurs
  • Integrated Bus Terminator (BT)
  • Surge Protector at the Trunk Input
  • Mounting: DIN rail, aluminum or plastic boxes for field installation

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