User's Manual

Title:
AJ102 Data Concentrator Unit User Manual
Ver.
1.4
Page:
19 of 23
Step 5: Install 3G external antenna
Tightly connect the external 3G antenna to SMA connector on the 3G module.
Note:
1) It’s better to install 3G antenna without removing the 3G module from the DCU.
2) Before install the 3G antenna, you may need to fix the 3G antenna on the cabinet of the DCU. Make
sure the 3G antenna is fixed at the bottom of the 3G module, and as show in figure shows are as
follows.(The antenna has been fixed on the bottom of the 3G module with 3m glue)
3) After installed the SIM card and 3G antenna, please check if the 3G module is tightly connected to the
main box of DCU.
Step 6: Connect the power wires
Connect the power wires according to the marking on the terminals.
Note:
1) To insure the reliable connection, install torque must higher than 3.5Nm.
2) The wire sequence from left to right be neutral, L1, L2, L3. It is important to have a right phase
sequence. Single-phase power supply is recommended to connect neutral and L3.
3) It is proposed to install a fuse-controlled disconnect switch before the DCU, so that it is easy to power
off the DCU for any maintain purpose.