ETAS
Hardware Description
BR_XETK-S4.0
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User
Guide
20
Fig.
4
-
4
Location of the BR_XETK-S4.0 Ethernet Interface connector
(CON1)
4.4
Power Supply
The BR_XETK-S4.0 requires a permanent power supply. It is typically powered
directly from the car battery. The input voltage may vary (see chapter 7.6
on
44). In case of higher input voltages to the XETK, additional voltage
protection is required. The BR_XETK-S4.0 will also accept voltage dips 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 BR_XETK-S4.0. The power supply of the ECU is not
affected by the BR_XETK-S4.0. An automatic switch ensures, that the power
consumption of the BR_XETK-S4.0 is reduced to a minimum, when the XETK
enters its standby (sleep) mode.
The BR_XETK-S4.0 is supplied with power through the connector CON3.
Fig.
4
-
5
Location of the BR_XETK-S4.0 Power Supply Connector (CON3)
CAUTION
See chapter “Requirements for failsafe Automotive Ethernet Operation” on
31 for details on wiring the Automotive Ethernet interface cables.
CON1
CON3