Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 44.2 >
edited by Xiaoling
on 2022/05/24 09:50
To version < 53.1 >
edited by Xiaoling
on 2022/05/24 10:02
>
Change comment: Uploaded new attachment "image-20220524100215-9.png", version {1}

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... ... @@ -1051,29 +1051,23 @@
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]]
1061 +[[image:image-20220524094909-3.png||height="338" width="727"]]
1062 1062  
1063 +[[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1063 1063  
1064 -[[image:image-20220524094909-3.png]]
1065 +[[image:image-20220524094909-5.png||height="341" width="734"]]
1065 1065  
1066 1066  
1067 -[[image:image-20220524094909-4.png]]
1068 1068  
1069 1069  
1070 -[[image:image-20220524094909-5.png]]
1071 1071  
1072 -
1073 -
1074 -
1075 -
1076 -
1077 1077  == 3.6 Interface Detail ==
1078 1078  
1079 1079  === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
... ... @@ -1082,19 +1082,21 @@
1082 1082  
1083 1083  [[image:1653356991268-289.png]]
1084 1084  
1079 +=== 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1085 1085  
1086 -
1087 -1.
1088 -11.
1089 -111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1090 -
1081 +(((
1091 1091  The DI port of LT-22222-L can support NPN or PNP output sensor.
1083 +)))
1092 1092  
1085 +(((
1093 1093  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 +)))
1094 1094  
1095 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1089 +[[image:1653357170703-587.png]]
1096 1096  
1091 +(((
1097 1097  When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1093 +)))
1098 1098  
1099 1099  
1100 1100  **Example1**: Connect to a Low active sensor.
... ... @@ -1104,11 +1104,11 @@
1104 1104  * Connect sensor’s output to DI1-
1105 1105  * Connect sensor’s VCC to DI1+.
1106 1106  
1107 -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： ​​
1108 1108  
1109 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1105 + //IF// = DI1+ / 1K.
1110 1110  
1111 -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.
1112 1112  
1113 1113  
1114 1114  **Example2**: Connect to a High active sensor.
... ... @@ -1120,12 +1120,12 @@
1120 1120  
1121 1121  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1122 1122  
1123 - //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.**
1124 1124  
1125 -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.
1126 1126  
1127 1127  
1128 -**Example3**: Connect to a 220v high active sensor.公司测试一下
1124 +**Example3**: Connect to a 220v high active sensor.
1129 1129  
1130 1130  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1131 1131  
... ... @@ -1134,34 +1134,24 @@
1134 1134  
1135 1135  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1136 1136  
1137 - //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.**
1138 1138  
1139 -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.
1140 1140  
1137 +=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1141 1141  
1142 -1.
1143 -11.
1144 -111. Digital Output Port: DO1/DO2 /DO3
1145 -
1146 1146  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1147 1147  
1148 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1141 +[[image:1653357531600-905.png]]
1149 1149  
1143 +=== 3.6.4 Analog Input Interface ===
1150 1150  
1151 -
1152 -
1153 -1.
1154 -11.
1155 -111. Analog Input Interface
1156 -
1157 1157  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:
1158 1158  
1159 -AC2 = (IN2 voltage )/12
1147 +**AC2 = (IN2 voltage )/12**
1160 1160  
1161 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1149 +[[image:1653357592296-182.png]]
1162 1162  
1163 -
1164 -
1165 1165  Example to connect a 4~~20mA sensor
1166 1166  
1167 1167  We take the wind speed sensor as an example for reference only.
... ... @@ -1177,9 +1177,9 @@
1177 1177  
1178 1178  Connection diagram:
1179 1179  
1180 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1166 +[[image:1653357640609-758.png]]
1181 1181  
1182 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1168 +[[image:1653357648330-671.png||height="155" width="733"]]
1183 1183  
1184 1184  
1185 1185  
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