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19 | Hardware Description
See chapter "Requirements for failsafe Automotive Ethernet Operation" on
page 28 for details on wiring the Automotive Ethernet interface cables.
Fig. 3-4
3.4
Power Supply
The BR_XETK-S1.0 requires a permanent power supply. It is typically powered
directly from the car battery. The input voltage may vary between 4.3 V and 36 V. In
case of higher input voltages to the XETK, additional voltage protection is required.
The BR_XETK-S1.0 will also accept voltage dips down to 3 V, for a maximum dura-
tion of 15 ms (for additional details of low voltage operation, see ISO standard
16750).
From the input battery voltage, switch-mode power supplies provide all necessary
voltages on the BR_XETK-S1.0. The power supply of the ECU is not affected by the
BR_XETK-S1.0. An automatic switch ensures that the power supply of the BR_X-
ETK-S1.0 is automatically switched on and off when the XETK enters and leaves its
standby (sleep) mode.
The BR_XETK-S1.0 is supplied with power through the connector CON4.
Fig. 3-5
ETAS BR_XETK-S1.0 | User Guide
CAUTION
CON1
Location of the BR_XETK-S1.0 Ethernet Interface Connector CON1
Location of the BR_XETK-S1.0 Power Supply Connector CON4
CON4
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