CCpilot VS 12”
Product revision: A
Technical Manual
2017-11-23
www.crosscontrol.com
8
3.2.3.
External key switch signal
The device’s key switch signal should be connected to the positive supply line via the vehicle’s
ignition key switch.
The wire gauge for the key switch signal shall be dimensioned to handle the total switch
current and the fuse type and rating shall be selected to prevent cable fire in case of cabling
short circuit.
As a guideline, a slow acting fuse in the range of 100-500 mA for the key switch signal
should be sufficient for most practically usable wire gauge.
3.2.4.
Application example
Below is an application example schematic of the
CCpilot VS 12”
power supply connection.
If the system has a main switch for completely disconnecting the battery (S1 in schematic below),
the device’s power supply and key switch signal shall be connected after the main switch.
It is
not
recommended to disconnect the battery without shutting down the device first - since
doing so will immediately switch off all internal voltages, regardless of ongoing operations. Any
information which was not saved to flash memory will be lost when disconnecting the battery.
However, no physical damage will be caused to the device by disconnecting the battery.
Figure 5: Schematic example for power supply installation of a CCpilot VS 12” device in a
vehicle. The ignition switch (S2) can be shared by several devices (Device X, Y, …)
By connecting the power supply according to the example above, the
CCpilot VS 12”
device will
automatically start up when the key switch (S2) is closed and shut down when the switch is opened.