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610	610
611	611	When a high voltage is given to the INT pin and then the level of the (% style="color:blue" %)**INT**(%%) pin changes from high to low, the interrupt is triggered by a falling edge and the RS485-LN sends an uplink data.
612	612
613		-(% style="color:red" %)**Note: The voltage ranges from 3.3V to 24V. Generally, it is recommended to use less than 12V.**
	613	+(% style="color:red" %)**Note: The level that triggers the interrupt ranges from 3.3V to 24V. Generally, it is recommended to use less than 12V.**
614	614
615	615	**Example:**
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618	618
619	619	When the dry contact is closed, INT and VIN+ conduct and INT is high.
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621		-Disconnecting the dry contact, the level of the INT pin changes from high to low, triggering an interrupt (triggered by the falling edge along the interrupt), and the RS485-LN sends an uplink data.
	621	+Disconnecting the dry contact, the level of the INT pin changes from high to low, triggering an interrupt (triggered along the falling edge), and the RS485-LN sends an uplink data.
622	622
623		-[[image:image-20240925164510-3.jpeg||height="414" width="656"]]
	623	+[[image:image-20240925174124-5.jpeg||height="439" width="703"]]
624	624
625	625	* Use a regulated power supply or a wet contact to connect the 485-LN to trigger the interruption.(This section uses a regulated power supply as an example.)
626	626
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633	633	[[image:image-20240925173243-4.jpeg||height="404" width="900"]]
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	635	+* Example of interrupt data in TTN.
635	635
	637	+The first byte of the payload of the interrupted packet is (% style="color:blue" %)**0x81**(%%).
	638	+
	639	+[[image:image-20240925181010-1.png||height="348" width="953"]]
	640	+
	641	+
636	636	== 3.4 Uplink Payload ==
637	637
638	638

image-20240925181010-1.png

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