User's Manual

Page
11
of
18
Lierda Science &
Technology Group
Securities
Securities
Securities
Securities Code
Code
Code
Code
IoT
IoT
IoT
IoT Interconnection,
Interconnection,
Interconnection,
Interconnection, Smart
Smart
Smart
Smart Life
Life
Life
Life
Lierda Science & Technology Group
registered trademark, CE certification logo, etc., with shield as the specific criterion;
2.Back label: display module product serial number, CMIIT ID, FCC ID, module P/N, lierda
registered trademark, etc, specific to the manufactured product;
Fig. 3- 3 Back label
3.Display by the terminal device ： The SRRC ID, FCC ID, etc, can be referenced by the terminal
device according to relevant standards.
Chapter
Chapter
Chapter
Chapter 4
4
4
4 Application
Application
Application
Application Instructions
Instructions
Instructions
Instructions
4.1
4.1
4.1
4.1 Notices
Notices
Notices
Notices to
to
to
to Typical
Typical
Typical
Typical Application
Application
Application
Application
1. Power Supply
It is suggested supplying power to the module with the DC regulated power supply. The ripple
coefficient of the power supply shall be smaller as possible, and the module shall be grounded reliably.
Please pay attention to the correct connection of the positive and negative poles of the power supply,
because reverse connection may lead to the permanent damage of the module;
2. Antenna Selection
2.1 PCB Antenna
The module is an on-board PCB antenna. During the layout of the board, please make sure the area
right below the antenna is completely clear, as shown in the following figure. The red part is the user ’ s
backplane area or the copper-clad area, the grey part is the clear area of the antenna of the user ’ s backplane,
and the boundary point of the clear area is the upper edge of the shielding cover. Make sure there is no any