Last modified by Saxer Lin on 2025/04/15 17:24
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From version < 45.2 >
edited by Xiaoling
on 2022/05/24 09:53
To version < 56.1 >
edited by Xiaoling
on 2022/05/24 10:10
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... ... @@ -1100,11 +1100,11 @@
1100 1100  * Connect sensor’s output to DI1-
1101 1101  * Connect sensor’s VCC to DI1+.
1102 1102  
1103 -So when sensor active, the current between NEC2501 pin1 and pin2 is:
1103 +So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1104 1104  
1105 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1105 + //IF// = DI1+ / 1K.
1106 1106  
1107 -If DI1+ = 12v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 12mA , So the LT-22222-L will be able to detect this active signal.
1107 +If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1108 1108  
1109 1109  
1110 1110  **Example2**: Connect to a High active sensor.
... ... @@ -1116,12 +1116,12 @@
1116 1116  
1117 1117  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1118 1118  
1119 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1119 +[[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png]]** [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
1120 1120  
1121 -If DI1+ = 24v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 24mA , So the LT-22222-L will be able to detect this high active signal.
1121 +If **DI1+ = 24v**, the [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1122 1122  
1123 1123  
1124 -**Example3**: Connect to a 220v high active sensor.公司测试一下
1124 +**Example3**: Connect to a 220v high active sensor.
1125 1125  
1126 1126  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1127 1127  
... ... @@ -1130,34 +1130,24 @@
1130 1130  
1131 1131  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1132 1132  
1133 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.
1133 + [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
1134 1134  
1135 -If sensor output is 220v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
1135 +If sensor output is 220v, the (% id="cke_bm_243359S" style="display:none" %) [[image:image-20220524095628-8.png]](%%) = DI1+ / 51K.  = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
1136 1136  
1137 +=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1137 1137  
1138 -1.
1139 -11.
1140 -111. Digital Output Port: DO1/DO2 /DO3
1141 -
1142 1142  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1143 1143  
1144 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1141 +[[image:1653357531600-905.png]]
1145 1145  
1143 +=== 3.6.4 Analog Input Interface ===
1146 1146  
1147 -
1148 -
1149 -1.
1150 -11.
1151 -111. Analog Input Interface
1152 -
1153 1153  The analog input interface is as below. The LT will measure the IN2 voltage so to calculate the current pass the Load. The formula is:
1154 1154  
1155 -AC2 = (IN2 voltage )/12
1147 +**AC2 = (IN2 voltage )/12**
1156 1156  
1157 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1149 +[[image:1653357592296-182.png]]
1158 1158  
1159 -
1160 -
1161 1161  Example to connect a 4~~20mA sensor
1162 1162  
1163 1163  We take the wind speed sensor as an example for reference only.
... ... @@ -1173,67 +1173,30 @@
1173 1173  
1174 1174  Connection diagram:
1175 1175  
1176 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1166 +[[image:1653357640609-758.png]]
1177 1177  
1178 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1168 +[[image:1653357648330-671.png||height="155" width="733"]]
1179 1179  
1170 +=== 3.6.5 Relay Output ===
1180 1180  
1181 -
1182 -1.
1183 -11.
1184 -111. Relay Output
1185 -
1172 +(((
1186 1186  The LT serial controller has two relay interfaces; each interface uses two pins of the screw terminal. User can connect other device’s Power Line to in serial of RO1_1 and RO_2. Such as below:
1174 +)))
1187 1187  
1188 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1189 1189  
1177 +[[image:image-20220524100215-9.png]]
1190 1190  
1191 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1179 +[[image:image-20220524100215-10.png||height="382" width="723"]]
1192 1192  
1193 1193  
1182 +== 3.7 LEDs Indicators ==
1194 1194  
1184 +[[image:image-20220524100748-11.png]]
1195 1195  
1186 += 4. Use AT Command =
1196 1196  
1197 -1.
1198 -11. LEDs Indicators
1188 +== 4.1 Access AT Command ==
1199 1199  
1200 -(% border="1" style="background-color:#f7faff" %)
1201 -|**LEDs**|**Feature**
1202 -|**PWR**|Always on if there is power
1203 -|**SYS**|After device is powered on, the SYS will **fast blink in GREEN** for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be **on GREEN for 5 seconds. **SYS will **blink Blue** on every upload and **blink Green** once receive a downlink message.
1204 -|**TX**|(((
1205 -Device boot: TX blinks 5 times.
1206 -
1207 -Successful join network: TX ON for 5 seconds.
1208 -
1209 -Transmit a LoRa packet: TX blinks once
1210 -)))
1211 -|**RX**|RX blinks once when receive a packet.
1212 -|**DO1**|
1213 -|**DO2**|
1214 -|**DO3**|
1215 -|**DI2**|(((
1216 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1217 -
1218 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1219 -)))
1220 -|**DI2**|(((
1221 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1222 -
1223 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1224 -)))
1225 -|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
1226 -|**DI2**|(((
1227 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1228 -
1229 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1230 -)))
1231 -|**RO1**|
1232 -|**RO2**|
1233 -
1234 -1. Use AT Command
1235 -11. Access AT Command
1236 -
1237 1237  LT supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to LT for using AT command, as below.
1238 1238  
1239 1239  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
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