ES720.1 - User’s Guide 25
ETAS Description of Functions
Additional notes and a list of USB sticks recommended by ETAS as storage
expansion of the ES720.1 can be found in chapter 8.5.4 on page 68.
GPS
The ES720.1 can be expanded by connecting a GPS receiver at the USB ports.
Access to the ECU Bus
The connection of the ES581 CAN bus interface USB module allows accessing
the CAN bus. Dependent on the INCA version used, the ES581 may require the
installation of an INCA Add-On.
4.4.2 Maximum Output Current
Each of the four USB ports can provide a maximum output current of 500 mA as
specified in the USB standard.
The maximum total of the output currents of the 4 USB ports of the ES720.1 is
le
ss than four times the maximum output current of a single USB port.
The total of the output currents of the 4 USB ports must not exceed 1.2 A.
For this condition to be met, the loading of the four USB output stages must be
dist
ributed by the external expansions, e.g. 2 x 500 mA and 2 x 100 mA.
4.4.3 Overload and Emergency-Off
If the output stage of a single USB port is overloaded due to a short circuit or if
the total of the output currents of the 4 USB ports exceeds 1.2 A, the following
steps
are automatically carried out:
1. Switching off all USB ports
2. Aborting the experiment
3. Saving the measured variables (inte
rnal storage)
4. Emergency-off of the ES720.1 to protect the hardware
5. Display of an error condition.
If the external storage medium used for storing the measured variables is for-
matted with the NTFS file system, its file system
and the measured variables
stored on it can be damaged or deleted during an emergency-off of the
ES720.1.
Possible data loss!
Do not disconnect the USB storage medium from the ES720.1 during
the data transfer.
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