ETAS
Hardware Description
FETK-T3.0 - User’s Guide
21
4.4
Power Supply
The FETK-T3.0 requires a permanent power supply. It is typically powered
directly from the car battery. The input voltage may vary between 6.0 V and
36 V. In case of higher input voltages to the FETK, additional voltage protection
is required.
The FETK is suitable for 12 V and 24 V systems. In 24 V systems the load dump
capability is reduced.
The FETK-T3.0 will also accept voltage drops down to 3 V (for additional details
of low voltage operation, see ISO standard 16750).
From the input battery voltage, switch-mode power supplies provide all neces-
sary voltages on the FETK-T3.0. The power supply of the ECU is not affected by
the FETK-T3.0. An automatic switch ensures that the power supply of the
FETK-T3.0 is automatically switched on and off when the FETK enters and
leaves its standby (sleep) mode.
The FETK-T3.0 is supplied with power through the connector CON2.
Fig. 4-4
Location of the FETK-T3.0 Power Supply Connector CON2
CON2