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Last modified by Mengting Qiu on 2025/06/04 18:42
From version 55.2
edited by Xiaoling
on 2022/05/24 10:10
Change comment: There is no comment for this version
To version 48.1
edited by Xiaoling
on 2022/05/24 09:56
Change comment: Uploaded new attachment "image-20220524095628-8.png", version {1}

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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// = DI1+ / 1K.
1105 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1106 1106  
1107 -If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
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.
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 -[[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.**
1119 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1120 1120  
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.
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.
1122 1122  
1123 1123  
1124 -**Example3**: Connect to a 220v high active sensor.
1124 +**Example3**: Connect to a 220v high active sensor.公司测试一下
1125 1125  
1126 1126  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1127 1127  
... ... @@ -1130,24 +1130,34 @@
1130 1130  
1131 1131  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1132 1132  
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.**
1133 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.
1134 1134  
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.
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.
1136 1136  
1137 -=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1138 1138  
1138 +1.
1139 +11.
1140 +111. Digital Output Port: DO1/DO2 /DO3
1141 +
1139 1139  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1140 1140  
1141 -[[image:1653357531600-905.png]]
1144 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1142 1142  
1143 -=== 3.6.4 Analog Input Interface ===
1144 1144  
1147 +
1148 +
1149 +1.
1150 +11.
1151 +111. Analog Input Interface
1152 +
1145 1145  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:
1146 1146  
1147 -**AC2 = (IN2 voltage )/12**
1155 +AC2 = (IN2 voltage )/12
1148 1148  
1149 -[[image:1653357592296-182.png]]
1157 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1150 1150  
1159 +
1160 +
1151 1151  Example to connect a 4~~20mA sensor
1152 1152  
1153 1153  We take the wind speed sensor as an example for reference only.
... ... @@ -1163,30 +1163,67 @@
1163 1163  
1164 1164  Connection diagram:
1165 1165  
1166 -[[image:1653357640609-758.png]]
1176 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1167 1167  
1168 -[[image:1653357648330-671.png||height="155" width="733"]]
1178 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1169 1169  
1170 -=== 3.6.5 Relay Output ===
1171 1171  
1172 -(((
1181 +
1182 +1.
1183 +11.
1184 +111. Relay Output
1185 +
1173 1173  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 -)))
1175 1175  
1188 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1176 1176  
1177 -[[image:image-20220524100215-9.png]]
1178 1178  
1179 -[[image:image-20220524100215-10.png||height="382" width="723"]]
1191 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1180 1180  
1181 1181  
1182 -== 3.7 LEDs Indicators ==
1183 1183  
1184 -[[image:image-20220524100748-11.png]]
1185 1185  
1186 -= 4. Use AT Command =
1187 1187  
1188 -== 4.1 Access AT Command ==
1197 +1.
1198 +11. LEDs Indicators
1189 1189  
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 +
1190 1190  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.
1191 1191  
1192 1192  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
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