二、什么叫回路供电（Loop powered）仪表 有电子线路构成的仪表都需要供给直流电源，许多仪表采用外部电源供电，如果用交流供电，仪表中则需要增加交直流转换电路，因...
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Low power loss is the key of loop powered transducer design. The methods for reducing power loss are discussed in this paper.
总线供电的变送器设计中的关键问题是降低功耗，文中讨论了关于降低功耗方面的几个问题。
When there are bias excitation, controllable silicon failure, over current and other failures, KA5 gets absorbed and breaker loop trips by powered on so as for switching off main power supply.
KA5为跳闸报警继电器。当设备产生偏励磁、可控硅故障、过电流等故障时，KA5吸合，断路器分励线圈得电跳闸，切断主电源。
Introduced the full galvanic isolated terminal applied in loop-powered 4~20 mA sensor transmitter. Presented two principles for solving the "ground"disturbance.
介绍了用于工业现场的带有电气隔离性能的二线制变送器。提出了解决“地”扰动要遵循的2个原则。
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