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1		-(% class="wikigeneratedid" %)
2		- **Contents:**
3		-
4		-{{toc/}}
5		-
6	6	= 1. Introduction =
7	7
8	8	This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
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15	15
16	16	Connection
17	17
18		-
19	19	[[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
20	20
21	21	Connection
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34	34
35	35	Connection
36	36
37		-
38	38	[[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
39	39
40	40	Connection
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58	58
59	59	Connection1
60	60
61		-(((
62	62	How to connect with Energy Meter：
63		-)))
64	64
65		-(((
66	66	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		-)))
68	68
69		-(((
70	70	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
71		-)))
72	72
73		-(((
74	74	Power Source VIN to RS485-LN VIN+
75		-)))
76	76
77		-(((
78	78	Power Source GND to RS485-LN VIN-
79		-)))
80	80
81		-(((
82	82	Once there is power, the RS485-LN will be on.
83		-)))
84	84
85	85	[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
86	86
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143	143
144	144	(% class="box infomessage" %)
145	145	(((
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
	127	+AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
147	147	)))
148	148
149	149	a: length for the return of AT+COMMAND
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230	230
231	231	==== 1.3.3.2 via LoRaWAN DOWNLINK ====
232	232
233		-[[image:image-20220512104358-3.png]]
	214	+[[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
234	234
235	235	(((
236	236	DOWNLINK
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241	241	)))
242	242
243	243	(((
244		-**Type Code 0xAF**
	225	+Type Code 0xAF
245	245	)))
246	246
247	247	(((
248		-(% class="box infomessage" %)
249		-(((
250	250	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
251	251	)))
252		-)))
253	253
254	254	(((
255	255	Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
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361	361	)))
362	362
363	363	(((
364		- output：01 03 04 00 00 00 42 7A 02
	342	+ output:01 03 04 00 00 00 42 7A 02
365	365	)))
366	366
367	367	[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]

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