e.bloxx A6-2CF
MOUNTING E.BLOXX AND CONNECTING WIRES
HB_EBLOXX-A62CF_E_V19.doc
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Gantner Instruments Test & Measurement GmbH
Picture 3.2.
- Bus Connection of an e.bloxx A6-2CF to the RS 485 Fieldbus with Derivation
Picture 3.3.
- Bus Connection of an e.bloxx A6-2CF to the RS 485 fieldbus via Stub Cable
The stub-cable should be as short as possible, not longer than 30 cm.
Notice:
The terminal designations A and B of all modules of the e.bloxx series are exchanged compared with the
PROFIBUS-definitions. Consequently, in multi-vendor systems the bus lines A and B have to be exchanged
when connecting them to the e.bloxx modules.
Bus Structure
The bus structure is a line structure where each bus segment will be terminated with characteristic impedance on both
ends. Branches can be set up by means of a bi-directional signal amplifier, so-called repeaters. Other types of branches
are not permitted (no tree topology). The max. stub-length to a user must not exceed 30 cm.
The following pictures show a few examples of possible bus topology structures. The meanings of the symbols are as
follows:
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