© 2006 Carlo Gavazzi Industri A/S. All rights reserved
89
G 3800 X036 Operation Manual
August 2006
Touch Screens, and for download/upload of Mastergenerator configuration files (requires a baud rate setting
of 115200). There is also an option to use COM2 as the serial interface to Radio Modems (please refer to
chapter 7 for more details on Radio Modem operation).
4.5. RS485
The RS485 port opens up the possibility to link up to 32 Mastergenerators together via an RS485 two-wire bus
as shown below. One of the units, configured as RS485 master (#32), coordinates an automatic exchange of
data between Mastergenerators, so that each unit is continuously updated with the status of every Dupline
address in the entire system. Each Mastergenerator controls its own section with 128 addresses, but can be
configured to be influenced by signals from other networks (see sec. 2.2). If for example the Dupline network
on the top floor of a building has a wind speed sensor connected to it, then the Mastergenerators in all the
other Dupline networks will be able to read and use the wind speed in the local roller blind control function.
Other examples is the possibility to switch of all lights in the entire building by activating one pushbutton at
the ground floor, and the option to collect all alarm signals in one Mastergenerator.
