ETK-V1.1 - User’s Guide
23
ETAS
Hardware Description
4.8
Power Supply
Fig. 4-10
Power Supply Connectors CON2 and CON3
The ETK-V1.1 needs a permanent power supply. It is powered directly from the
car battery. The input voltage may vary between 4.3 V and 18 V.
The ECU voltage (VDDE2/3) is monitored by the ETK to recognize whether the
ECU is switched on or off. In case of higher input voltages to the ETK an addi-
tional voltage converter is required. All necessary voltages are created through
switching power supplies which minimizes heat build-up. The power supply of
the ECU is not affected by the ETK-V1.1. An automatic switch ensures that the
power supply of the ETK-V1.1 is automatically switched on and off.
Fig. 4-11
Power Supply Connector CON2
The ETK-V1.1 can be supplied with power through the 2-pin power supply con-
nector CON2.
Additionally the through-hole solder pad CON3 can be used to connect a power
supply U
Batt2
. The power supply on CON3 must use the GND of CON2 (refer to
chapter 5.2.2).
Pin CON2
Signal
Description
1
U
Batt
Battery Supply Voltage for ETK
2
GND
Ground
CON2
CON3
CON2
CON4
CON1
