GALILEOSKY GLONASS/GPS Satellite v4.0 (0223) User’s manual
GalileoSky Ltd.
Page 31
8.7
Connecting audio equipment
Microphone specifications
Parameter
Min. value
Mean value
Max. value
Operating voltage, V
1.60
2.2
Operating current, microampere
70
300
Load resistance, kOhm
1.2
2.2
Speaker specifications
Parameter
Min. value
Mean value
Max. value
Connected speaker resistance, Ohm
8
Operating current, mA
+-250
Power with a 32Ohm speaker, mW
250
8.8
Connecting
Ш
2 passenger flow registration sensors
The Terminal supports connection of up to 16 Ш2 sensors through 8 discrete-analog inputs (DAI) IN0-IN7
(Contacts description).
Connection order of one Ш2 sensor through resistor to one of DAI of the Terminal.
To connect 2 Ш2 sensors to one of DAI use divisor on two resistors. Calculation principle is realized on
voltage level change by sensors triggering.
V – Power supply (battery/ vehicle power supply);
R1, R2 – resistors;
Mic0
0
Mic1
Spkr0
Spkr1
GND
Screen for audio cables
Electret
microphone
