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10	10
11	11	Connection
12	12
	13	+
13	13	[[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
14	14
15	15	Connection
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28	28
29	29	Connection
30	30
	32	+
31	31	[[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
32	32
33	33	Connection
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51	51
52	52	Connection1
53	53
	56	+(((
54	54	How to connect with Energy Meter：
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55	55
	60	+(((
56	56	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.
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57	57
	64	+(((
58	58	The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
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59	59
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60	60	Power Source VIN to RS485-LN VIN+
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61	61
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62	62	Power Source GND to RS485-LN VIN-
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63	63
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64	64	Once there is power, the RS485-LN will be on.
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65	65
66	66	[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
67	67
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68	68	Connection2
69	69
70	70
71		-[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="763" width="573"]]
	85	+[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="712" width="534"]]
72	72
73	73	Connection3
74	74
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124	124
125	125	(% class="box infomessage" %)
126	126	(((
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
	141	+ AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
128	128	)))
129	129
130	130	a: length for the return of AT+COMMAND
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292	292
293	293	DOWNLINK
294	294
	309	+
295	295	[[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
296	296
297	297	DOWNLINK
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319	319	check digit: Even
320	320	)))
321	321
322		-[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
	337	+[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
323	323
324	324	USB
325	325
326	326
327		-[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
	342	+[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
328	328
329	329	USB
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349	349
350	350	If users need to read the parameters of multiple energy meters, they need to modify the device address, because the default device address of each energy meter is 01.
351	351
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352	352	Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
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353	353
354	354	[[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
355	355
356		-Example:These two meters are examples of setting parameters and device addresses.
	375	+**Example**:These two meters are examples of setting parameters and device addresses.
357	357
358		-[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
	377	+[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
359	359
360		-[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="800" width="600"]]
	379	+[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
361	361
	381	+(((
	382	+(((
362	362	First of all, since the default device address of the energy meter is 01, the configuration of two energy meters will conflict, so we first connect an energy meter and configure the device address.
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363	363
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364	364	We can use AT+CFGDEV to set the device address.
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365	365
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	394	+(((
366	366	We modify the device address 01 of the first energy meter to 02.
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	397	+)))
367	367
368	368	[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
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