Installation Instruction

CNI-800D Developer’s Guide
7
5. Power Supply and Current Usage
5.1 Example of Power Supply from out-source : input Voltage 4V±10%,
more than 1.1 A
5.2 Current Usage
TX : 1.1A
RX : 70mA
St-By : 30mA
Average Current Usage in Standby Mode is about 30.6mA
n Design Considerations
To integrate a wireless modem, there are several issues that need to be addressed and considered. Internal
connections and placement are critical to a successful implementation. A successful design requires
attention to several support mechanisms as following:
- DC Power
- Serial interface and control
- Mechanical mounting
- Software
- Antenna
- RF control
44V to 7V 4V
5V
4V
Determine Ratio of R1 & R2
by Input Voltage
RPM POWER INPUT
RPM POWER INPUT
CASE 1
CASE 2
LM317
I
3
O
2
A
1
R1
R2
100uF
+
104
+
100uF
+
104
+
D?
DIODE
100uF
+
104
+