Dart是一个动态电源和控制系统，用于本质安全的现场总线安装，可以大大提高爆炸危险区域中现场设备的功率，同时保持本质安全的能量水平。产品开发花费约500万欧元的投资和10年来实现。
“The DART system supplies enough power to support nearly as many devices as is typically supplied in non-hazardous areas, and can also power field instruments that previously required more power than intrinsically safe solutions could offer,” says David Hohenstein, Department Manager, Pepperl+Fuchs. “What makes DART so unique is that it enables process users to fully benefit from the advantages of fieldbus technology in hazardous area applications such as ensuring system availability and lowering total cost of ownership.”
Early intrinsic safety solutions included the entity concept and菲斯科。这些使用户能够将多个设备连接到现场总线段的单个电源，但低可用电量限制了每个段的设备数量和可达电缆距离，强制使用用户设计复杂的总线拓扑，并使现场总线更加困难成本合理。最近，大功率主干概念（HPTC）为用户提供了安全安装在爆炸性环境中，提供给现场总线段的电源，同时保持设备连接处的内在安全性。据该公司称，Dart代表了内在安全演变的革命性下一步。
“飞镖是令人兴奋和更好的选择,因为我t eliminates the power problem of intrinsic safety with a completely new approach to energy limitation. It allows for considerable higher direct power, while maintaining limitations on intrinsically safe energy via rapid disconnection,” explains Hohenstein. “Rather than taking a traditional approach to explosion prevention by limiting the available power to field devices, the DART system detects a fault condition by its characteristic rate of current change, and disconnects power before sparking can start.”
在正常操作期间，DART电源为8至50瓦的全标功率馈送到呈指数上的功率比在内部安全环境中通常允许的大约两种瓦。如果发生故障，则潜在的火花仍然是非输，并且DART检测所产生的电流变化，并立即关闭电源。从电气系统的微秒精度下降到安全水平，抢夺了点燃危险气体所需的能量的火花。
DART applied to fieldbus provides a much higher intrinsically safe power allowance to the trunk so that the segment can support up to about 32 devices per segment – the maximum permitted per segment. This reduces capital costs by eliminating excessive fieldbus infrastructure. Moreover, cable lengths as long as 1000 meters are possible, opening up many application areas to fieldbus technology while maintaining intrinsic safety requirements for all devices and cables, including the trunk line. The higher device count per segment eliminates the problem of having to design complex network topologies with many sub-segments, each requiring its own power supply, junction boxes, and barriers.
DART technology also offers advanced diagnostics to help users rectify problems quickly and ensure system availability. And because DART Fieldbus is designed as a fieldbus infrastructure for existing IS field devices and DCS systems, or for any installation in which an intrinsically safe fieldbus segment is required, it is suitable for both green- and brown field sites.
资料来源：Gary MintChell的饲料前锋博客
“The DART system supplies enough power to support nearly as many devices as is typically supplied in non-hazardous areas, and can also power field instruments that previously required more power than intrinsically safe solutions could offer,” says David Hohenstein, Department Manager, Pepperl+Fuchs. “What makes DART so unique is that it enables process users to fully benefit from the advantages of fieldbus technology in hazardous area applications such as ensuring system availability and lowering total cost of ownership.”
Early intrinsic safety solutions included the entity concept and菲斯科。这些使用户能够将多个设备连接到现场总线段的单个电源，但低可用电量限制了每个段的设备数量和可达电缆距离，强制使用用户设计复杂的总线拓扑，并使现场总线更加困难成本合理。最近，大功率主干概念（HPTC）为用户提供了安全安装在爆炸性环境中，提供给现场总线段的电源，同时保持设备连接处的内在安全性。据该公司称，Dart代表了内在安全演变的革命性下一步。
“飞镖是令人兴奋和更好的选择,因为我t eliminates the power problem of intrinsic safety with a completely new approach to energy limitation. It allows for considerable higher direct power, while maintaining limitations on intrinsically safe energy via rapid disconnection,” explains Hohenstein. “Rather than taking a traditional approach to explosion prevention by limiting the available power to field devices, the DART system detects a fault condition by its characteristic rate of current change, and disconnects power before sparking can start.”
在正常操作期间，DART电源为8至50瓦的全标功率馈送到呈指数上的功率比在内部安全环境中通常允许的大约两种瓦。如果发生故障，则潜在的火花仍然是非输，并且DART检测所产生的电流变化，并立即关闭电源。从电气系统的微秒精度下降到安全水平，抢夺了点燃危险气体所需的能量的火花。
DART applied to fieldbus provides a much higher intrinsically safe power allowance to the trunk so that the segment can support up to about 32 devices per segment – the maximum permitted per segment. This reduces capital costs by eliminating excessive fieldbus infrastructure. Moreover, cable lengths as long as 1000 meters are possible, opening up many application areas to fieldbus technology while maintaining intrinsic safety requirements for all devices and cables, including the trunk line. The higher device count per segment eliminates the problem of having to design complex network topologies with many sub-segments, each requiring its own power supply, junction boxes, and barriers.
DART technology also offers advanced diagnostics to help users rectify problems quickly and ensure system availability. And because DART Fieldbus is designed as a fieldbus infrastructure for existing IS field devices and DCS systems, or for any installation in which an intrinsically safe fieldbus segment is required, it is suitable for both green- and brown field sites.
资料来源：Gary MintChell的饲料前锋博客
