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Loop-powered supplies - WG25

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The passive WG 25 repeater power supply is loop-powered. It is used for galvanic hazardous area isolation of a 2-wire supply line and transmits both 4 ... 20 mA and HART® signals in each direction. With a voltage drop of just 4.2 V, the WG 25 uses the supply optimally so that all common 2-wire transmitters can be connected.

The Advantages
Compared with active repeater power supplies, it has considerable price and reliability advantages. For example, only a central, safe-area power supply that does not even need Safe Isolation is required even for multi-channel systems.

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