Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 45.1 >
edited by Xiaoling
on 2022/05/24 09:52
To version < 56.1 >
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on 2022/05/24 10:10
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... ... @@ -1051,23 +1051,17 @@
1051 1051  
1052 1052  [[image:1653356838789-523.png||height="337" width="740"]]
1053 1053  
1054 -
1055 1055  After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1056 1056  
1057 1057  
1058 -[[image:image-20220524094909-1.png]]
1057 +[[image:image-20220524094909-1.png||height="335" width="729"]]
1059 1059  
1059 +[[image:image-20220524094909-2.png||height="337" width="729"]]
1060 1060  
1061 -[[image:image-20220524094909-2.png]]
1062 -
1063 -
1064 1064  [[image:image-20220524094909-3.png||height="338" width="727"]]
1065 1065  
1063 +[[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1066 1066  
1067 -[[image:image-20220524094909-4.png||height="339" width="728"]]
1068 -
1069 -(% style="display:none" %) (%%)
1070 -
1071 1071  [[image:image-20220524094909-5.png||height="341" width="734"]]
1072 1072  
1073 1073  
... ... @@ -1074,7 +1074,6 @@
1074 1074  
1075 1075  
1076 1076  
1077 -
1078 1078  == 3.6 Interface Detail ==
1079 1079  
1080 1080  === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
... ... @@ -1083,19 +1083,21 @@
1083 1083  
1084 1084  [[image:1653356991268-289.png]]
1085 1085  
1079 +=== 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1086 1086  
1087 -
1088 -1.
1089 -11.
1090 -111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1091 -
1081 +(((
1092 1092  The DI port of LT-22222-L can support NPN or PNP output sensor.
1083 +)))
1093 1093  
1085 +(((
1094 1094  Internal circuit as below, the NEC2501 is a photocoupler, the Active current (from NEC2501 pin 1 to pin 2 is 1ma and the max current is 50mA. When there is active current pass NEC2501 pin1 to pin2. The DI will be active high
1087 +)))
1095 1095  
1096 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1089 +[[image:1653357170703-587.png]]
1097 1097  
1091 +(((
1098 1098  When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1093 +)))
1099 1099  
1100 1100  
1101 1101  **Example1**: Connect to a Low active sensor.
... ... @@ -1105,11 +1105,11 @@
1105 1105  * Connect sensor’s output to DI1-
1106 1106  * Connect sensor’s VCC to DI1+.
1107 1107  
1108 -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： ​​
1109 1109  
1110 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1105 + //IF// = DI1+ / 1K.
1111 1111  
1112 -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.
1113 1113  
1114 1114  
1115 1115  **Example2**: Connect to a High active sensor.
... ... @@ -1121,12 +1121,12 @@
1121 1121  
1122 1122  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1123 1123  
1124 - //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.**
1125 1125  
1126 -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.
1127 1127  
1128 1128  
1129 -**Example3**: Connect to a 220v high active sensor.公司测试一下
1124 +**Example3**: Connect to a 220v high active sensor.
1130 1130  
1131 1131  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1132 1132  
... ... @@ -1135,34 +1135,24 @@
1135 1135  
1136 1136  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1137 1137  
1138 - //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.**
1139 1139  
1140 -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.
1141 1141  
1137 +=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1142 1142  
1143 -1.
1144 -11.
1145 -111. Digital Output Port: DO1/DO2 /DO3
1146 -
1147 1147  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1148 1148  
1149 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1141 +[[image:1653357531600-905.png]]
1150 1150  
1143 +=== 3.6.4 Analog Input Interface ===
1151 1151  
1152 -
1153 -
1154 -1.
1155 -11.
1156 -111. Analog Input Interface
1157 -
1158 1158  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:
1159 1159  
1160 -AC2 = (IN2 voltage )/12
1147 +**AC2 = (IN2 voltage )/12**
1161 1161  
1162 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1149 +[[image:1653357592296-182.png]]
1163 1163  
1164 -
1165 -
1166 1166  Example to connect a 4~~20mA sensor
1167 1167  
1168 1168  We take the wind speed sensor as an example for reference only.
... ... @@ -1178,67 +1178,30 @@
1178 1178  
1179 1179  Connection diagram:
1180 1180  
1181 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1166 +[[image:1653357640609-758.png]]
1182 1182  
1183 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1168 +[[image:1653357648330-671.png||height="155" width="733"]]
1184 1184  
1170 +=== 3.6.5 Relay Output ===
1185 1185  
1186 -
1187 -1.
1188 -11.
1189 -111. Relay Output
1190 -
1172 +(((
1191 1191  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 +)))
1192 1192  
1193 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1194 1194  
1177 +[[image:image-20220524100215-9.png]]
1195 1195  
1196 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1179 +[[image:image-20220524100215-10.png||height="382" width="723"]]
1197 1197  
1198 1198  
1182 +== 3.7 LEDs Indicators ==
1199 1199  
1184 +[[image:image-20220524100748-11.png]]
1200 1200  
1186 += 4. Use AT Command =
1201 1201  
1202 -1.
1203 -11. LEDs Indicators
1188 +== 4.1 Access AT Command ==
1204 1204  
1205 -(% border="1" style="background-color:#f7faff" %)
1206 -|**LEDs**|**Feature**
1207 -|**PWR**|Always on if there is power
1208 -|**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.
1209 -|**TX**|(((
1210 -Device boot: TX blinks 5 times.
1211 -
1212 -Successful join network: TX ON for 5 seconds.
1213 -
1214 -Transmit a LoRa packet: TX blinks once
1215 -)))
1216 -|**RX**|RX blinks once when receive a packet.
1217 -|**DO1**|
1218 -|**DO2**|
1219 -|**DO3**|
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 -|**DI2**|(((
1226 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1227 -
1228 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1229 -)))
1230 -|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
1231 -|**DI2**|(((
1232 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1233 -
1234 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1235 -)))
1236 -|**RO1**|
1237 -|**RO2**|
1238 -
1239 -1. Use AT Command
1240 -11. Access AT Command
1241 -
1242 1242  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.
1243 1243  
1244 1244  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
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