(2) For LoRa communication, the antenna is located at the upper right part of the
device. If the device is installed in the metal cabinet, the antenna shall be extended out
of the cabinet to ensure the communication quality.
(3) 4G communication. The lower right part of the device is 4G communication
module. After opening the small plate on the upper cover of the module, the SIM card
can be replaced.
Along the grooved clamshell,you can see
the microUSB and microSIM ports,as
shown in figure
③
（
Cut to the left
）
insert SIM card
(1) Flip
(2) MicroUSB
(3) MicroSIM
9.4.2 Residual current connection
The two wires of the residual current
transformer are respectively connected to the two terminals IO+ and IO- of the
residual current loop of the device.
Alarm or fault signal may be generated when the remaining current transformer
is connected live, which is not caused by the device fault but the live wiring operation.
Therefore, try to avoid the device's live wiring operation.
IO-
IO-
NG
剩余电流互感器
9.4.3 Temperature wiring
The two wires of the temperature probe are connected to the two terminals of the
temperature loop of the device respectively. The first line are PT1A and PT1B
Residual current
transformer