Onboard Network Concept - Bosch VCU Manual

3 | Onboard Network Concept

UBAT
Star connection
(term30)
Main
Switch
G
GND_Starpoint
As short as
possible
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3 Onboard Network Concept
Please ensure that you have a good ground installation. That means:
– A ground that has a solid, low resistance connection to the negative battery terminal
– Connection should be free from dirt, grease, paint, anodizing, etc.
– Use large diameter wire
– More metal-to-metal contact is better!
The following notations for power signals are used:
– KL 15 is a switched battery rail controlled by the IGN-switch
– KL 30 is an unswitched battery positive rail (same as battery positive terminal)
– KL 31 is an unswitched ground rail (same as battery negative terminal)
Be careful to observe current limits of wires and connector pins!
IGN-
Switch
positive terminal
Chassis
Engine_GND
NOTICE
This schematic is not device specific. Please see the section Technical
Data [} 7] for the specifications of your device.
Vehicle_Control_Unit_VCU_Manual
KL15
KL30
µC
KL31
Star connection
dig. sensors
(e.g. wheelspeed)
LS_GND_1
LS_GND_2
SENSGND
switched pos. terminal
Electric Loads
Bosch Motorsport
Device
diagnosis connector
LS_SWITCH1...4
UBATT_FUSE
SENSPWR10
SENSPWR5
ANA_IN(xy)
NTC
ANA_IN(xx)
Sensor
PC
active
Sensor
Bosch Motorsport