Last modified by Bei Jinggeng on 2025/01/16 11:36
<
From version < 75.2 >
edited by Xiaoling
on 2022/09/29 16:37
To version < 97.1 >
edited by Bei Jinggeng
on 2022/11/30 10:55
>
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Summary

Details

Page properties
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.Xiaoling
1 +XWiki.Bei
Content
... ... @@ -33,40 +33,28 @@
33 33  
34 34  == 1.1 What is RS485-LN RS485 to LoRaWAN Converter ==
35 35  
36 -(((
37 -(((
38 -(((
39 -
40 40  
37 +(((
41 41  The Dragino RS485-LN is a (% style="color:blue" %)**RS485 to LoRaWAN Converter**(%%). It converts the RS485 signal into LoRaWAN wireless signal which simplify the IoT installation and reduce the installation/maintaining cost.
42 42  )))
43 -)))
44 44  
45 45  (((
46 -(((
47 47  RS485-LN allows user to (% style="color:blue" %)**monitor / control RS485 devices**(%%) and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
48 48  )))
49 -)))
50 50  
51 51  (((
52 -(((
53 53  (% style="color:blue" %)**For data uplink**(%%), RS485-LN sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-LN will process these returns according to user-define rules to get the final payload and upload to LoRaWAN server.
54 54  )))
55 -)))
56 56  
57 57  (((
58 -(((
59 59  (% style="color:blue" %)**For data downlink**(%%), RS485-LN runs in LoRaWAN Class C. When there downlink commands from LoRaWAN server, RS485-LN will forward the commands from LoRaWAN server to RS485 devices.
60 60  )))
61 61  
62 62  (((
63 63  (% style="color:blue" %)**Demo Dashboard for RS485-LN**(%%) connect to two energy meters: [[https:~~/~~/app.datacake.de/dashboard/d/58844a26-378d-4c5a-aaf5-b5b5b153447a>>url:https://app.datacake.de/dashboard/d/58844a26-378d-4c5a-aaf5-b5b5b153447a]]
64 -
65 -
66 66  )))
67 -)))
68 -)))
69 69  
57 +
70 70  (% aria-label="1653267211009-519.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1653267211009-519.png||data-widget="image" height="419" width="724"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
71 71  
72 72  
... ... @@ -76,7 +76,7 @@
76 76  
77 77  (% style="color:#037691" %)**Hardware System:**
78 78  
79 -* STM32L072CZT6 MCU
67 +* STM32L072xxxx MCU
80 80  * SX1276/78 Wireless Chip 
81 81  * Power Consumption (exclude RS485 device):
82 82  ** Idle: 32mA@12v
... ... @@ -108,8 +108,6 @@
108 108  * Automatic RF Sense and CAD with ultra-fast AFC.
109 109  * Packet engine up to 256 bytes with CRC
110 110  
111 -
112 -
113 113  == 1.3 Features ==
114 114  
115 115  
... ... @@ -122,8 +122,6 @@
122 122  * Support Modbus protocol
123 123  * Support Interrupt uplink (Since hardware version v1.2)
124 124  
125 -
126 -
127 127  == 1.4 Applications ==
128 128  
129 129  
... ... @@ -134,8 +134,6 @@
134 134  * Smart Cities
135 135  * Smart Factory
136 136  
137 -
138 -
139 139  == 1.5 Firmware Change log ==
140 140  
141 141  
... ... @@ -309,10 +309,10 @@
309 309  To use RS485-LN to read data from RS485 sensors, connect the RS485-LN A/B traces to the sensors. And user need to make sure RS485-LN use the match UART setting to access the sensors. The related commands for UART settings are:
310 310  
311 311  
312 -(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
294 +(% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:510px" %)
313 313  |=(% style="width: 110px;" %)(((
314 314  **AT Commands**
315 -)))|=(% style="width: 190px;" %)(((
297 +)))|=(% style="width: 210px;" %)(((
316 316  **Description**
317 317  )))|=(% style="width: 190px;" %)(((
318 318  **Example**
... ... @@ -367,8 +367,6 @@
367 367  )))
368 368  )))
369 369  
370 -
371 -
372 372  === 3.3.2 Configure sensors ===
373 373  
374 374  
... ... @@ -380,8 +380,8 @@
380 380  )))
381 381  )))
382 382  
383 -(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
384 -|=(% style="width: 110px;" %)**AT Commands**|=(% style="width: 190px;" %)**Description**|=(% style="width: 190px;" %)**Example**
363 +(% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:510px" %)
364 +|=(% style="width: 110px;" %)**AT Commands**|=(% style="width: 210px;" %)**Description**|=(% style="width: 190px;" %)**Example**
385 385  |AT+CFGDEV|(% style="width:110px" %)(((
386 386  (((
387 387  This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
... ... @@ -396,8 +396,6 @@
396 396  )))
397 397  )))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
398 398  
399 -
400 -
401 401  === 3.3.3 Configure read commands for each sampling ===
402 402  
403 403  
... ... @@ -430,7 +430,7 @@
430 430  
431 431  (% border="1" style="background-color:#4bacc6; color:white; width:499px" %)
432 432  |(% style="width:496px" %)(((
433 -(% style="color:#037691" %)**AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
411 +**AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
434 434  
435 435  **xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**
436 436  
... ... @@ -516,13 +516,15 @@
516 516  Final Payload is (% style="color:#4f81bd" %)**PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**
517 517  
518 518  
519 -1. PAYVER: Defined by AT+PAYVER
520 -1. PAYLOAD COUNT: Total how many uplinks of this sampling.
521 -1. PAYLOAD#: Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
522 -1. DATA: Valid value: max 8 bytes for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 8 bytes
497 +~1. PAYVER: Defined by AT+PAYVER
523 523  
499 +2. PAYLOAD COUNT: Total how many uplinks of this sampling.
524 524  
501 +3. PAYLOAD#: Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
525 525  
503 +4. DATA: Valid value: max 8 bytes for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 8 bytes
504 +
505 +
526 526  (% aria-label="image-20220602155039-4.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602155039-4.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​
527 527  
528 528  
... ... @@ -588,8 +588,26 @@
588 588  == 3.4 Uplink Payload ==
589 589  
590 590  
591 -(% aria-label="image-20220606110929-1.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220606110929-1.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]]
571 +(% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:500px" %)
572 +|=(% scope="row" style="width: 60px;" %)(((
573 +Size(bytes)
574 +)))|(% style="width:80px" %)1|(% style="width:360px" %)(((
575 +Length depends on the return from the commands
576 +)))
577 +|=(% style="width: 90px;" %)(((
578 +Value
579 +)))|(% style="width:114px" %)(((
580 +PAYLOAD_VER
581 +)))|(% style="width:353px" %)(((
582 +If the valid payload is too long and exceed the maximum
592 592  
584 +support payload length in server, server will show payload not
585 +
586 +provided in the LoRaWAN server.
587 +)))
588 +
589 +(% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]]
590 +
593 593  (% title="Click and drag to resize" %)​
594 594  
595 595  Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
... ... @@ -651,7 +651,7 @@
651 651  
652 652  
653 653  (((
654 -This command is used to configure the RS485 devices; they won't be used during sampling.
652 +This command is used to configure the RS485 devices; they won't be used during sampling. Max Length of AT+CFGDEV is **40 bytes**.
655 655  )))
656 656  
657 657  (((
... ... @@ -1133,15 +1133,10 @@
1133 1133  
1134 1134  (((
1135 1135  Set the Rs485 serial communication parameters:
1136 -
1137 -
1138 1138  )))
1139 1139  
1140 -* (((
1141 -(% style="color:#037691" %)** AT Command:**
1142 -
1143 -
1144 -
1136 +(((
1137 +(% style="color:#037691" %)**AT Command:**
1145 1145  )))
1146 1146  
1147 1147  (((
... ... @@ -1148,7 +1148,7 @@
1148 1148  * Set Baud Rate
1149 1149  )))
1150 1150  
1151 -(% style="color:#4472c4" %)** AT+BAUDR=9600** (%%) ~/~/  Options: (200~~115200)  When using low baud rate or receiving multiple bytes, you need to use AT+CMDDL to increase the receive timeout (the default receive timeout is 400ms), otherwise data will be lost
1144 +(% style="color:#4472c4" %)** AT+BAUDR=9600** (%%) ~/~/  Options: (200~~115200)  When using low baud rate or receiving multiple bytes, you need to use AT+CMDDL to increase the receive timeout (the default receive timeout is 400ms), otherwise data will be lost
1152 1152  
1153 1153  
1154 1154  (((
... ... @@ -1155,7 +1155,7 @@
1155 1155  * Set UART Parity
1156 1156  )))
1157 1157  
1158 -(% style="color:#4472c4" %)** AT+PARITY=0** (%%) ~/~/  Option: 0: no parity, 1: odd parity, 2: even parity
1151 +(% style="color:#4472c4" %)** AT+PARITY=0** (%%) ~/~/  Option: 0: no parity, 1: odd parity, 2: even parity
1159 1159  
1160 1160  
1161 1161  (((
... ... @@ -1162,21 +1162,18 @@
1162 1162  * Set STOPBIT
1163 1163  )))
1164 1164  
1165 -(% style="color:#4472c4" %)** AT+STOPBIT=0** (%%) ~/~/  Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
1158 +(% style="color:#4472c4" %)** AT+STOPBIT=0** (%%) ~/~/  Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
1166 1166  
1167 1167  
1168 -
1169 -* (((
1170 -(% style="color:#037691" %)** Downlink Payload:**
1161 +(((
1162 +(% style="color:#037691" %)**Downlink Payload:**
1171 1171  )))
1172 1172  
1173 1173  (((
1174 -(% style="color:#4472c4" %)** A7 01 aa bb**:   (%%) Same  AT+BAUDR=hex(aa bb)*100
1166 +(% style="color:#4472c4" %)** A7 01 aa bb**:   (%%) Same  AT+BAUDR=hex(aa bb)*100
1175 1175  )))
1176 1176  
1177 1177  (((
1178 -
1179 -
1180 1180  **Example:**
1181 1181  )))
1182 1182  
... ... @@ -1198,7 +1198,27 @@
1198 1198  
1199 1199  
1200 1200  
1191 +==== (% style="color:blue" %)**Configure Databit (Since Version 1.4.0)**(%%) ====
1201 1201  
1193 +
1194 +* (((
1195 +(% style="color:#037691" %)** AT Command:**
1196 +)))
1197 +
1198 +(% style="color:#4472c4" %)** AT+DATABIT=7    **(%%)~/~/ Set the data bits to 7
1199 +
1200 +(% style="color:#4472c4" %)** AT+DATABIT=8    **(%%)~/~/ Set the data bits to 8
1201 +
1202 +* (((
1203 +(% style="color:#037691" %)**Downlink Payload:**
1204 +)))
1205 +
1206 +(% style="color:#4472c4" %)** A7 04 07**(%%): Same as  AT+DATABIT=7
1207 +
1208 +(% style="color:#4472c4" %)** A7 04 08**(%%): Same as  AT+DATABIT=8
1209 +
1210 +
1211 +
1202 1202  ==== (% style="color:blue" %)**Encrypted payload**(%%) ====
1203 1203  
1204 1204  (((
... ... @@ -1274,20 +1274,17 @@
1274 1274  
1275 1275  (% style="color:#4472c4" %)** AT+RPL=5**  (%%) ~/~/ After receiving the package from the server, it will immediately upload the content of the package to the server, the port number is 100.
1276 1276  
1277 -
1278 1278  Example：**aa xx xx xx xx**         ~/~/ aa indicates whether the configuration has changed, 00 is yes, 01 is no; xx xx xx xx are the bytes sent.
1279 1279  
1280 1280  
1281 1281  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173747-6.png?width=1124&height=165&rev=1.1||alt="image-20220823173747-6.png"]]
1282 1282  
1283 -
1284 -
1285 1285  For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1286 1286  
1287 1287  
1295 +
1288 1288  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173833-7.png?width=1124&height=149&rev=1.1||alt="image-20220823173833-7.png"]]
1289 1289  
1290 -
1291 1291  For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1292 1292  
1293 1293  
... ... @@ -1329,7 +1329,7 @@
1329 1329  (% style="color:#037691" %)**Downlink Payload:**
1330 1330  )))
1331 1331  
1332 -(% style="color:#4472c4" %)** A6 aa bb bb               ** (%%) ~/~/same as AT+RXMODE=aa,bb
1339 +(% style="color:#4472c4" %)** A6 aa bb bb               ** (%%) ~/~/ same as AT+RXMODE=aa,bb
1333 1333  
1334 1334  [[image:image-20220824144240-1.png]]
1335 1335  
... ... @@ -1446,24 +1446,20 @@
1446 1446  == 3.7 Buttons ==
1447 1447  
1448 1448  
1449 -(% border="1" cellspacing="10" style="background-color:#f7faff; width:430px" %)
1450 -|=(% style="width: 50px;" %)**Button**|=(% style="width: 361px;" %)**Feature**
1456 +(% border="1.5" cellspacing="4" style="background-color:#ffffcc; width:430px" %)
1457 +|=(% style="width: 50px;" %)**Button**|=(% style="width: 380px;" %)**Feature**
1451 1451  |(% style="width:50px" %)**ACT**|(% style="width:361px" %)If RS485 joined in network, press this button for more than 1 second, RS485 will upload a packet, and the SYS LED will give a (% style="color:blue" %)**Blue blink**
1452 1452  |(% style="width:50px" %)**RST**|(% style="width:361px" %)Reboot RS485
1453 1453  |(% style="width:50px" %)**PRO**|(% style="width:361px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1454 1454  
1455 -
1456 -
1457 1457  == 3.8 LEDs ==
1458 1458  
1459 1459  
1460 -(% border="1" cellspacing="10" style="background-color:#f7faff; width:430px" %)
1465 +(% border="1.5" cellspacing="4" style="background-color:#ffffcc; width:430px" %)
1461 1461  |=(% style="width: 50px;" %)**LEDs**|=(% style="width: 380px;" %)**Feature**
1462 1462  |**PWR**|Always on if there is power
1463 1463  |**SYS**|After device is powered on, the SYS will (% style="color:green" %)**fast blink in GREEN**(%%) for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be (% style="color:green" %)**on GREEN for 5 seconds** (%%)**. **SYS will (% style="color:green" %)**blink Blue**(%%) on every upload and (% style="color:green" %)**blink Green**(%%) once receive a downlink message.
1464 1464  
1465 -
1466 -
1467 1467  = 4. Case Study =
1468 1468  
1469 1469  
... ... @@ -1662,7 +1662,7 @@
1662 1662  == 6.5 Can i use point to point communication for RS485-LN? ==
1663 1663  
1664 1664  
1665 -Yes, please refer [[Point to Point Communication for RS485-LN>>Point to Point Communication for RS485-LN]].
1668 +Yes, please updating point-to-point [[firmware>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AACP33wo_ZQLsxW2MJ70oUoba/RS485-LN/Firmware?dl=0&subfolder_nav_tracking=1]]，then refer [[Point to Point Communication for RS485-LN>>Point to Point Communication for RS485-LN]].
1666 1666  
1667 1667  
1668 1668  
... ... @@ -1672,7 +1672,107 @@
1672 1672  [[Use RS485-BL or RS485-LN to connect to RS232 devices. - DRAGINO>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/RS485%20to%20RS232/]]
1673 1673  
1674 1674  
1678 +== 6.7 How to judge whether there is a problem with the set COMMAND ==
1675 1675  
1680 +=== 6.7.1 Introduce: ===
1681 +
1682 +
1683 +Users can use below the structure to fast debug the communication between RS485BL and RS485-LN. The principle is to put the PC in the RS485 network and sniff the packet between Modbus MTU and RS485-BL/LN. We can use this way to:
1684 +
1685 +1. Test if Modbus-MTU works with PC commands.
1686 +1. Check if RS485-LN sent the expected command to Mobus-MTU
1687 +1. Check if Modbus-MTU return back the expected result to RS485-LN.
1688 +1. If both b) and c) has issue, we can compare PC’s output and RS485-LN output.
1689 +
1690 +[[image:image-20221130104310-1.png||height="380" width="680"]]
1691 +
1692 +
1693 +Example Connection:
1694 +
1695 +[[image:image-20221130104310-2.png]]
1696 +
1697 +
1698 +=== 6.7.2 Set up PC to monitor RS485 network With Serial tool ===
1699 +
1700 +Note: Receive and send set to hex mode
1701 +
1702 +[[image:image-20221130104310-3.png||height="616" width="714"]]
1703 +
1704 +
1705 +=== 6.7.3 With ModRSsim2: ===
1706 +
1707 +(1)Select serial port MODBUS RS-232
1708 +
1709 +[[image:image-20221130104310-4.png||height="390" width="865"]]
1710 +
1711 +
1712 +(2)Click the serial port icon
1713 +
1714 +[[image:image-20221130104310-5.png||height="392" width="870"]]
1715 +
1716 +
1717 +(3)After selecting the correct serial port and baud rate, click ok
1718 +
1719 +[[image:image-20221130104310-6.png]]
1720 +
1721 +(4)Click the comms.
1722 +
1723 +[[image:image-20221130104310-7.png||height="376" width="835"]]
1724 +
1725 +(% class="wikigeneratedid" id="HRunRS485-LN2FBLcommandandmonitorifitiscorrect." %)
1726 +Run RS485-LN/BL command and monitor if it is correct.
1727 +
1728 +
1729 +=== 6.7.4 Example – Test the CFGDEV command ===
1730 +
1731 +RS485-LN sent below command:
1732 +
1733 +AT+CFGDEV=01 03 20 00 01 85 c0,1 to RS485 network, and PC is able to get this command and return commands from MTU to show in the serial tool.
1734 +
1735 +
1736 +We can see the output from the Serial port tool to analyze. And check if they are expected result.
1737 +
1738 +[[image:image-20221130104310-8.png||height="214" width="797"]]
1739 +
1740 +We can also use ModRSsim2 to see the output.
1741 +
1742 +[[image:image-20221130104310-9.png||height="531" width="729"]]
1743 +
1744 +
1745 +
1746 +=== 6.7.5 Example – Test CMD command sets. ===
1747 +
1748 +Run AT+SENSORVALUE=1 to test the CMD commands set in RS485-LN.
1749 +
1750 +
1751 +Serial port tool:
1752 +
1753 +[[image:image-20221130104310-10.png||height="339" width="844"]]
1754 +
1755 +ModRSsim2:
1756 +
1757 +[[image:image-20221130104310-11.png||height="281" width="962"]]
1758 +
1759 +
1760 +
1761 +=== 6.7.6 Test with PC ===
1762 +
1763 +If there is still have problem to set up correctly the commands between RS485-LN and MTU. User can test the correct RS485 command set in PC and compare with the RS485 command sent out via RS485-LN. as long as both commands are the same, the MTU should return correct result.
1764 +
1765 +
1766 +Or User can send the working commands set in PC serial tool to Dragino Support to check what should be configured in RS485-LN.
1767 +
1768 +Connection method：
1769 +
1770 +[[image:image-20221130104310-12.png]]
1771 +
1772 +Link situation:
1773 +
1774 +[[image:image-20221130104310-13.png||height="458" width="486"]]
1775 +
1776 +[[image:image-20221130104310-14.png||height="371" width="823"]]
1777 +
1778 +
1676 1676  = 7. Trouble Shooting =
1677 1677  
1678 1678  
... ... @@ -1708,8 +1708,6 @@
1708 1708  * (% style="color:red" %)**RU864**(%%):  frequency bands RU864
1709 1709  * (% style="color:red" %)**KZ865**(%%):  frequency bands KZ865
1710 1710  
1711 -
1712 -
1713 1713  = 9.Packing Info =
1714 1714  
1715 1715  
... ... @@ -1726,8 +1726,6 @@
1726 1726  * Package Size / pcs : 14.5 x 8 x 5 cm
1727 1727  * Weight / pcs : 170g
1728 1728  
1729 -
1730 -
1731 1731  = 10. FCC Caution for RS485LN-US915 =
1732 1732  
1733 1733  
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