Billion M500 User Manual page 19

Case 2:
Connect to a power source
The power connector includes one input pin to meet "Ignition Sensing". The pin is ESD protected to do
"automatic ON and time-delay Off" if ACC input signal is connected to a vehicle's ACC signal line.
Ignition Sensing: In this mode the router will turn off after the input has been held at low for the timeout
period. The router will then reboot when the input is returned to high. If the input is held low for less
than the timeout period before returning to high, no action is taken.
This diagram shows the connector pin definition.
Definition
Pin
1 Ground
2 Ground
3 ACC
4 VCC
Details
-
-
Standard ignition-on signal.
The voltage higher than 10.0V will be detected as ignition asserted.
10V ~ 56V DC
15
Wireless
Color
Black
Black
White
Red