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	1	+(% class="wikigeneratedid" %)
	2	+ **Contents:**
	3	+
	4	+{{toc/}}
	5	+
1	1	= 1. Introduction =
2	2
3	3	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
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53	53
54	54	Connection1
55	55
	61	+(((
56	56	How to connect with Energy Meter：
	63	+)))
57	57
	65	+(((
58	58	Follow the instructions of the electric energy meter to connect the phase line and the neutral line, and then connect 485A+ and 485B- to RS485A and RA485B of RS485-LN respectively.
	67	+)))
59	59
	69	+(((
60	60	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
	71	+)))
61	61
	73	+(((
62	62	Power Source VIN to RS485-LN VIN+
	75	+)))
63	63
	77	+(((
64	64	Power Source GND to RS485-LN VIN-
	79	+)))
65	65
	81	+(((
66	66	Once there is power, the RS485-LN will be on.
	83	+)))
67	67
68	68	[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
69	69
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126	126
127	127	(% class="box infomessage" %)
128	128	(((
129		-AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
	146	+ AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
130	130	)))
131	131
132	132	a: length for the return of AT+COMMAND
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213	213
214	214	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
215	215
216		-[[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
	233	+[[image:image-20220512104358-3.png]]
217	217
218	218	(((
219	219	DOWNLINK
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224	224	)))
225	225
226	226	(((
227		-Type Code 0xAF
	244	+**Type Code 0xAF**
228	228	)))
229	229
230	230	(((
	248	+(% class="box infomessage" %)
	249	+(((
231	231	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
232	232	)))
	252	+)))
233	233
234	234	(((
235	235	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
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341	341	)))
342	342
343	343	(((
344		- output:01 03 04 00 00 00 42 7A 02
	364	+ output：01 03 04 00 00 00 42 7A 02
345	345	)))
346	346
347	347	[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]

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