Siebert S102 Série Manuel D'utilisation page 34

Project planning information
This project planning information applies to the interface format RS485.
In interface format RS485, you can select settings
item 1. The selected setting depends on whether the protocol reply is to be sent by
the display:
If the display should not send a protocol reply (normal case), application example A
applies for activating one or more displays.
If a protocol reply is expected, a differentiation has to be made whether one single
unit or more units are to be activated. If one single unit is activated, application
example B is valid.
If several units are to be activated, a bus wiring is necessary. You have to
differentiate, if a 4-wire bus (full-duplex) or a 2-wire bus (half-duplex) is used.
Application example C applies for 4-wire bus and application example D applies for
2-wire bus.
Caution! In the following diagrams SGD is the signal ground of the RS485 inter-
face. For units with 14 mm character height (S102-xx/14/0x-00x/0B-M0)
SGD corresponds to the COM terminal and for units with 25 mm
character height (S102-xx/25/0x-00x/0B-M0) to the GND terminal.
BAL S102 SER M 1.0
, and in the menu
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