Safety valve position feedback module
An intrinsically safe, valve position feedback technology, used in valve devices, engine components, mechanical equipment, etc., can solve the problems of incompatibility, long purchase cycle, and high cost of imported intrinsically safe feedback modules, achieving compact circuit structure. , improve load efficiency, improve the effect of anti-interference
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[0008] Such as figure 1 As shown, the intrinsically safe valve position feedback module includes connectors, inductance coils, NOT gate circuits, RC filters for regulated power supplies, transmitters, power amplifiers, overvoltage protection circuits, and wiring terminals. The connectors pass through the inductance coils The NAND gate circuit, RC filter, transmitter, power amplifier, overvoltage protection circuit, and terminal are connected in sequence, the RC filter is connected with the NOT gate circuit to form a loop circuit, and the terminal outputs a two-wire 4-20mA signal.
[0009] Such as figure 2 As shown, the 1KHZ square wave signal transmitted from the external intelligent valve positioner; input to the inductance coil of the intrinsically safe module through the connector; isolated and amplified by the inductance coil; input to the NOT gate circuit, the power supply voltage of the NOT gate circuit It is the DC stable voltage output from the 4-20mA transmitter...
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