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Summary

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1 -**Table of Contents:**
1 +(% class="wikigeneratedid" %)
2 + **Contents:**
2 2  
3 3  {{toc/}}
4 4  
5 -
6 -
7 -
8 -
9 -
10 10  = 1. Introduction =
11 11  
12 -
13 13  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
14 14  
15 -
16 16  == 1.1 Example 1: Connect to Leak relay and VFD ==
17 17  
18 -
19 19  This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Relay and VFD and communicate with Mobile. The structure is like below:
20 20  
14 +[[image:image-20220527091852-1.png]]
21 21  
22 -[[image:image-20220527091852-1.png||height="547" width="994"]]
16 +Connection
23 23  
24 -**Connection**
25 25  
26 26  
27 -
28 28  [[image:image-20220527091942-2.png]](% style="display:none" %)
29 29  
30 -**Connection**
22 +Connection
31 31  
32 32  
33 -(% style="color:blue" %)**Related documents:**
25 +Related documents:
34 34  
35 -* System Structure:  [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
36 -* Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code:  [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
27 +* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
28 +* [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code.
37 37  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
38 38  
39 -
40 -
41 41  == 1.2 Example 2: Connect to Pulse Counter ==
42 42  
43 -
44 44  This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Pulse Counter and communicate with Mobile. This example and example 2 compose the structure for a farm IoT solution. The structure is like below:
45 45  
35 +[[image:image-20220527092058-3.png]]
46 46  
47 -[[image:image-20220527092058-3.png||height="552" width="905"]]
37 +Connection
48 48  
49 -**Connection**
50 50  
40 +[[image:image-20220527092146-4.png]]
51 51  
42 +Connection
52 52  
53 -[[image:image-20220527092146-4.png||height="507" width="906"]]
54 -
55 -**Connection**
56 -
57 -
58 -(% style="color:blue" %)**Related documents:**
59 -
60 -* Configure Document:  [[Pickdata MIO40 water pulse counter to LoRa with Dragino RS485-LN>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Pulse-Counter/||_mstmutation="1"]]
44 +* [[Pickdata MIO40 water pulse counter to LoRa with Dragino RS485-LN>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Pulse-Counter/]] : Configure Document
61 61  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
62 62  
47 +== ==
63 63  
49 +== 1.3 Example3: Use RS485-LN with energy meters ==
64 64  
65 -== 1.3 Example 3: Use RS485-LN with energy meters ==
66 -
67 67  === 1.3.1 OverView ===
68 68  
69 -
70 70  (((
71 -(% style="color:red" %)**Note**：**The specifications of each energy meter are different, please refer to your own energy meter specifications.**
54 +**Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
72 72  )))
73 73  
74 74  (((
75 75  This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
76 -
77 -
78 78  )))
79 79  
80 80  [[image:image-20220527092419-5.png]]
81 81  
82 -**Connection1**
63 +Connection1
83 83  
84 84  
85 -
86 86  (((
87 -(% style="color:blue" %)**How to connect with Energy Meter：**
88 -
89 -
67 +How to connect with Energy Meter：
90 90  )))
91 91  
92 92  (((
... ... @@ -107,30 +107,29 @@
107 107  
108 108  (((
109 109  Once there is power, the RS485-LN will be on.
110 -
111 -
112 112  )))
113 113  
114 114  [[image:image-20220527092514-6.png]]
115 115  
116 -**Connection2**
92 +Connection2
117 117  
118 118  
119 -
120 120  [[image:image-20220527092555-7.png]]
121 121  
122 -**Connection3**
97 +Connection3
123 123  
124 124  
125 125  === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
126 126  
127 -
128 128  If the user needs to read the parameters of the electric energy meter and use the modbus command,please refer to the appendix of the MODBUS communication protocol in the user manual of the energy meter.
129 129  
130 -[[image:image-20220601143257-10.png]]
104 +[[image:image-20220527092629-8.png]]
131 131  
132 132  
133 -(% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
107 +(% class="box infomessage" %)
108 +(((
109 +**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
110 +)))
134 134  
135 135  * The first byte : slave address code (=001～247)
136 136  * The second byte : read register value function code
... ... @@ -139,12 +139,12 @@
139 139  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
140 140  
141 141  (((
142 -
143 -
144 -
145 145  How to parse the reading of the return command of the parameter：
120 +)))
146 146  
147 -(% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
122 +(% class="box infomessage" %)
123 +(((
124 +**Example:** RETURN1：01 03 02 08 FD 7E 05
148 148  )))
149 149  
150 150  * The first byte ARD: slave address code (=001～254)
... ... @@ -157,63 +157,56 @@
157 157  (% class="wikigeneratedid" %)
158 158  (((
159 159  
160 -
161 -
162 162  )))
163 163  
164 164  === 1.3.3 How to configure RS485-LN and parse output commands ===
165 165  
166 -
167 167  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
168 168  
169 169  
170 -==== 1.3.3.1 via AT COMMAND ====
144 +==== 1.3.3.1 via AT COMMAND: ====
171 171  
146 +First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
172 172  
173 -First, we can use (% style="color:blue" %)**AT+CFGDEV**(%%) to get the return value, and we can also judge whether the input parameters are correct.
174 -
175 175  (((
176 176  If the configured parameters and commands are incorrect, the return value is not obtained.
177 -
178 -
179 179  )))
180 180  
181 -[[image:image-20220601143201-9.png]]
152 +[[image:image-20220527092748-9.png]]
182 182  
183 -**AT COMMAND**
154 +AT COMMAND
184 184  
185 185  
186 186  (% class="box infomessage" %)
187 187  (((
188 - (% _mstmutation="1" %)**AT+DATACUTx **(%%):  This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
159 + AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
189 189  )))
190 190  
191 -a:  length for the return of AT+COMMAND
162 +a: length for the return of AT+COMMAND
192 192  
193 -b: 1: grab valid value by byte, max 6 bytes;  2: grab valid value by bytes section, max 3 sections.
164 +b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
194 194  
195 -c:  define the position for valid value.
166 +c: define the position for valid value.
196 196  
197 -[[image:image-20220601143115-8.png]]
168 +[[image:image-20220527092936-10.png]]
198 198  
199 -**AT COMMAND**
170 +AT COMMAND
200 200  
201 201  
202 -
203 203  PAYLOAD is available after the valid value is intercepted.
204 204  
205 -[[image:image-20220601143046-7.png]]
206 206  
207 -**AT COMMAND**
176 +[[image:image-20220527093059-11.png]]
208 208  
178 +AT COMMAND
209 209  
210 210  
211 211  You can get configured PAYLOAD on TTN.
212 212  
213 -[[image:image-20220601143519-1.png]]
183 +[[image:image-20220527093133-12.png]]
214 214  
215 215  (((
216 -**AT COMMAND**
186 +AT COMMAND
217 217  )))
218 218  
219 219  (((
... ... @@ -221,76 +221,63 @@
221 221  )))
222 222  
223 223  (((
224 -(% style="color:blue" %)**Example**:
225 -
226 -
227 -(% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
194 +**Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
228 228  )))
229 229  
230 230  (((
231 -RETURN1: 01 03 02 00 02 39 85 00 00(return data)
198 +RETURN1:01 03 02 00 02 39 85 00 00(return data)
232 232  )))
233 233  
234 234  (((
235 -AT+DATACUT1: 9,1,4+5+6+7 Take the return value 00 02 39 85 as the valid value of reading current data and used to splice payload.
236 -
237 -
202 +AT+DATACUT1:9,1,4+5+6+7 Take the return value 00 02 39 85 as the valid value of reading current data and used to splice payload.
238 238  )))
239 239  
240 240  (((
241 -(% style="color:red" %)**CMD2: **(%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
206 +CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
242 242  )))
243 243  
244 244  (((
245 -RETURN2: 01 03 02 08 DC BE 1D(return data)
210 +RETURN2:01 03 02 08 DC BE 1D(return data)
246 246  )))
247 247  
248 248  (((
249 -AT+DATACUT2: 7,1,4+5 Take the return value 08 DC as the valid value of reading voltage data and used to splice payload.
250 -
251 -
214 +AT+DATACUT2:7,1,4+5 Take the return value 08 DC as the valid value of reading voltage data and used to splice payload.
252 252  )))
253 253  
254 254  (((
255 -(% style="color:red" %)**CMD3:**(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
218 +CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
256 256  )))
257 257  
258 258  (((
259 -RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
222 +RETURN3:01 03 04 00 00 00 44 FA 00(return data)
260 260  )))
261 261  
262 262  (((
263 -AT+DATACUT3: 9,1,4+5+6+7 Take the return value 00 00 00 44 as the valid value of reading total active energy data and used to splice payload.
226 +AT+DATACUT3:9,1,4+5+6+7 Take the return value 00 00 00 44 as the valid value of reading total active energy data and used to splice payload.
264 264  )))
265 265  
266 266  (((
267 -Payload: 01 00 02 39 85 08 DC 00 00 00 44
268 -
269 -
230 +Payload:01 00 02 39 85 08 DC 00 00 00 44
270 270  )))
271 271  
272 -[[image:image-20220601142936-6.png]]
233 +[[image:image-20220527093204-13.png]]
273 273  
274 274  AT COMMAND
275 275  
276 276  
238 +(% style="color:#4f81bd" %)**01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.**
277 277  
278 -(% style="color:blue" %)**01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.**
240 +[[image:image-20220527093251-14.png]]
279 279  
280 -
281 -[[image:image-20220601143642-2.png]]
282 -
283 283  AT COMMAND
284 284  
285 285  
286 -
287 287  ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
288 288  
289 -
290 290  [[image:image-20220527093358-15.png]]
291 291  
292 292  (((
293 -**DOWNLINK**
250 +DOWNLINK
294 294  )))
295 295  
296 296  (((
... ... @@ -298,7 +298,7 @@
298 298  )))
299 299  
300 300  (((
301 -(% style="color:blue" %)**Type Code 0xAF**
258 +**Type Code 0xAF**
302 302  )))
303 303  
304 304  (((
... ... @@ -309,9 +309,7 @@
309 309  )))
310 310  
311 311  (((
312 -(% style="color:red" %)**Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
313 -
314 -
269 +Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
315 315  )))
316 316  
317 317  (((
... ... @@ -347,47 +347,40 @@
347 347  )))
348 348  
349 349  (((
350 -
351 -
352 -(% style="color:blue" %)**Example:**
305 +Example:
353 353  )))
354 354  
355 355  (((
356 -**AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
309 +AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
357 357  )))
358 358  
359 -[[image:image-20220601144149-6.png]]
312 +[[image:image-20220527093430-16.png]]
360 360  
361 -**DOWNLINK**
314 +DOWNLINK
362 362  
363 363  
317 +[[image:image-20220527093508-17.png]]
364 364  
365 -[[image:image-20220601143803-3.png]]
319 +DOWNLINK
366 366  
367 -**DOWNLINK**
368 368  
322 +[[image:image-20220527093530-18.png]]
369 369  
324 +DOWNLINK
370 370  
371 -[[image:image-20220601144053-5.png]]
372 372  
373 -**DOWNLINK**
327 +[[image:image-20220527093607-19.png]]
374 374  
329 +DOWNLINK
375 375  
376 376  
377 -[[image:image-20220601143921-4.png]]
332 +[[image:image-20220527093628-20.png]]
378 378  
379 -**DOWNLINK**
334 +DOWNLINK
335 +
380 380  
381 -
382 -
383 -[[image:image-20220601142805-5.png]]
384 -
385 -**DOWNLINK**
386 -
387 -
388 388  === 1.3.4 How to configure and output commands for RS485 to USB ===
389 389  
390 -
391 391  (((
392 392  This step is not necessary, it is just to show how to use a normal RS485 to USB adapter to connect to the meter to check the input and output. This can be used to test the connection and RS485 command of the meter without RS485-LN.
393 393  )))
... ... @@ -406,47 +406,37 @@
406 406  
407 407  (((
408 408  check digit: Even
409 -
410 -
411 411  )))
412 412  
413 413  [[image:image-20220527093708-21.png]]
414 414  
415 -**USB**
361 +USB
416 416  
417 417  
418 -
419 419  [[image:image-20220527093747-22.png]]
420 420  
421 -**USB**
366 +USB
422 422  
423 423  
424 -
425 425  (((
426 426  The configuration command is consistent with the AT command, input the hexadecimal command directly into the serial port, and the serial port will output the command.
427 -
428 -
429 429  )))
430 430  
431 431  (((
432 -(% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
374 +**Example:**  input：01 03 00 31 00 02 95 c4
433 433  )))
434 434  
435 435  (((
436 436   output：01 03 04 00 00 00 42 7A 02
437 -
438 -
439 439  )))
440 440  
441 441  [[image:image-20220527093821-23.png]]
442 442  
443 -**USB**
383 +USB
444 444  
445 445  
446 -
447 447  === 1.3.5 How to configure multiple devices and modify device addresses ===
448 448  
449 -
450 450  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.
451 451  
452 452  (((
... ... @@ -455,18 +455,15 @@
455 455  )))
456 456  )))
457 457  
458 -[[image:image-20220601142044-1.png]]
396 +[[image:image-20220527093849-24.png]]
459 459  
460 460  
461 -(% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
399 +**Example**:These two meters are examples of setting parameters and device addresses.
462 462  
463 -
464 464  [[image:image-20220527093950-25.png]]
465 465  
466 -
467 467  [[image:image-20220527094028-26.png]]
468 468  
469 -
470 470  (((
471 471  (((
472 472  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.
... ... @@ -475,7 +475,7 @@
475 475  
476 476  (((
477 477  (((
478 -We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
413 +We can use AT+CFGDEV to set the device address.
479 479  )))
480 480  )))
481 481  
... ... @@ -485,18 +485,14 @@
485 485  )))
486 486  )))
487 487  
488 -[[image:image-20220601142354-2.png]]
423 +[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
489 489  
425 +AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
490 490  
491 -(% class="box infomessage" %)
492 -(((
493 -**AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
494 -)))
427 +* 01:device adaress
495 495  
496 -* 01: device adaress
429 +* 10:function code
497 497  
498 -* 10: function code
499 -
500 500  * 00 61：Register address
501 501  
502 502  * 00 01：Number of Registers
... ... @@ -513,62 +513,43 @@
513 513  
514 514  Its default device address is 01, and the following are the parameters for configuring two energy meters.
515 515  
516 -[[image:image-20220601142452-3.png]]
447 +[[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
517 517  
449 +[[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
518 518  
519 -[[image:image-20220601142607-4.png]]
451 +PAYLOAD:01 08 DF 43 62
520 520  
521 -
522 -(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
523 -
524 524  * 08 DF is the valid value of the meter with device address 02.
525 525  * 43 62 is the valid value of the meter with device address 01.
526 526  
527 -(% style="display:none" %) (%%)
528 -
529 -(% style="display:none" %) (%%)
530 -
531 531  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
532 532  
458 +This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology. The structure is like below:
533 533  
534 -This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology.
460 +[[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
535 535  
536 -The structure is like below:
537 -
538 -[[image:image-20220527094330-30.png]]
539 -
540 540  Connection
541 541  
464 +* [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/]] : Configure Documen
542 542  
543 -* Configure Documen:  [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/||_mstmutation="1"]]
544 -
545 -
546 -
547 547  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
548 548  
549 -
550 550  This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
551 551  
552 -* Configure Document For RS485-BL:  [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Application_Note/&file=Dragino%20RS485BL%20and%20pickdata%20SEM%20Three%20v1.pdf||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
553 -* Configure Document for RS485-LN:  [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/SEM_Three_Energy_Meter/&file=SEM%20three%20and%20Dragino%20RS485-LN%20v1.pdf||_mstmutation="1"]]
470 +* [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Application_Note/&file=Dragino%20RS485BL%20and%20pickdata%20SEM%20Three%20v1.pdf]] : Configure Document For RS485-BL
554 554  
472 +* [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/SEM_Three_Energy_Meter/&file=SEM%20three%20and%20Dragino%20RS485-LN%20v1.pdf]] : Configure Document for RS485-LN
555 555  
474 +== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
556 556  
557 -== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
558 -
559 -
560 560  This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
561 561  
562 -* Configure Document For RS485-LN:  [[CEM C31 485-T1-MID>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/ELECTRICAL%20CABINET/&file=ELECTRICAL%20CABINET%20READINGS.pdf||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
478 +* [[CEM C31 485-T1-MID>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/ELECTRICAL%20CABINET/&file=ELECTRICAL%20CABINET%20READINGS.pdf]] : Configure Document For RS485-LN
563 563  
480 +== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
564 564  
482 +[[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
565 565  
566 -== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
567 -
568 -
569 -[[image:image-20220527094556-31.png]]
570 -
571 571  Network Structure
572 572  
573 -
574 574  * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
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