ETAS ES584.1, User Manual

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ES584.1 – User’s Guide 19
ETAS Hardware Description
Recommendation
To maintain the reference level (and thereby identical switching thresholds) at
the individual nodes on the LIN bus, the LIN transceivers (physical layer) of all
nodes on the bus should be operated with the same voltage.
We therefore recommend powering all nodes on the LIN bus with the external
voltage that also powers the other bus participants (LIN VBAT, see Fig. 3-3
on page 18).
At the same time, this ensure compliance with safe switching thresholds in each
operating state of the LIN system (e.g. during vehicle cold starts).
If there is no access or no possibility of using the LIN V
BAT
voltage as reference
and supply voltage, the LIN transceivers of the dedicated LIN node of the ES584.1
can be supplied by a switchable internal voltage source of the module.
This internal supply voltage is
not routed outside via the CAN/LIN plug connec-
tor.
3.7 USB Port
The module is permanently connected using a cable with type A USB connector
for connection to the USB port of a PC or a drive recorder.
The module must be operated directly at the USB port of a PC, a drive recorder
or an active hub, whose USB interface meets the requirements stated in the
table in chapter 6.7.1 on page 37.

The use of USB cables to extend the connection between ES584.1 and the PC
or drive recorder is not permitted.
3.8 Power Supply
The ES584.1 module is powered via the USB 2.0 port of a PC or a drive recorder.
The module does not require an external power supply. Information on the
requirements for the PC's USB port can be found in chapter 6.7.1 on page 37.
3.9 Y-Cable
A Y-cable (CBCF100, see chapter 7.1 on page 43) allows the CAN and LIN inter-
face of the ES584.1 module to access vehicle buses or ECUs.
Note