Crocus CNV DIP switches and straps of the Crocus CNV
User manual 33
3.1.3 Straps of the Table Top
Strap ST1
On the TT, you can configure the interconnection between signal ground and protective ground (earth).
Use strap ST1 for this purpose. For the location of ST1 on the TT motherboard, refer to Section 3.1.1
Location of the DIP switches and straps on the Table Top.
Strap settings Connection Description
disconnected
As default, the signal ground is disconnected from the
earth. This avoids problems which might occur when the
earth potential of the Crocus CNV and the connected
application is not the same. In such a situation earth current
loops may induce distortion on the transmitted data,
resulting in transmission errors.
connected through
100 ohms resistor
Sometimes you might want to connect the Crocus CNV
earth to the application earth although both earth potentials
are not the same. (E.g. to avoid a big difference between
both earth potentials.) To avoid that high earth currents are
generated, you can make this connection through a 100
ohms resistor.
directly connected Sometimes it is not possible to connect the application
directly to the earth. In that case you can earth the
application through the Crocus CNV by connecting the
Crocus CNV to the earth and setting strap ST1 in position
3.
Also the opposite situation might occur: it is not possible to
earth the Crocus CNV. In that case you can earth the
Crocus CNV through the application by connecting the
application to the earth and setting strap ST1 in position 3.
3 2 1
3 2 1
3 2 1
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