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ETAS ES800 System | User Guide
12.9.4 Overload and Emergency Shutdown
If the output stage of a USB interface of the module is overloaded as a result of a
short-circuit or if its output current exceeds the USB standard value, the following
steps are automatically performed:
A All USB connections are switched off
B The measurement/experiment is aborted
C Emergency shutdown of the module in order to protect the hardware
D Display of an error state.
12.9.5 Strain Relief
Larger USB devices (e.g., memory sticks) can damage the USB connections of the
module as a result of vibrations and the resulting forces.
Threaded Holes
In addition to the USB interfaces, the housing of the ES820.1 and of the ES830.1
features two threaded holes for screws. This enables strain relief devices (e.g.
cable clamps) to be connected easily so as to secure the connected USB cables in
place.
Screws
Screws for attaching the strain relief devices are not included in the scope of sup-
ply.
Provision of strain Relief
The strain relief for the USB devices must be provided by the user.
NOTE
If the measurement is aborted as a result of the USB connections being
switched off, the recorded data may be lost.
NOTE
If this error state occurs, the module must be restarted.
NOTE
We recommend connecting larger USB devices to the ES820.1 by means of a USB
cable rather than directly.
NOTE
Screw the strain relief onto the module using exclusively M3x6 cylinder screws
and a max. torque of 0.8
Nm.
The screw-in depth in the blind hole of the housing measures max. 6 mm.
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