Communication - Samson TROVIS 5474 Mounting And Operating Instructions

Communication

10 Communication
Using the serial system bus interface RS-232-C, the TROVIS 5474 Boiler Controller can commu-
nicate with a building control system. In combination with a suitable software for process visual-
ization and communication, a complete control system can be implemented.
The following communication settings are possible:
– Operation with a dial-up modem at the RS-232-C system bus interface
Basically, communication is only established automatically when errors occur. The controller
works autonomously. Nevertheless, the modem can dial up to the controller at any time to read
data from it or otherwise influence it, if necessary. We recommend to use the modem connect-
ing cable (1400-7139).
– Operation with a leased line modem at the RS-232-C system bus interface
Communication is established via a permanent connection between two leased line modems.
This setup is applied for long-distance transmissions or when different signal level converters
are used. The connection between controller and modem can also be established via the mo-
dem connecting cable (1400-7139).
– Operation at a four-wire or two-wire bus
To establish the link between controller and bus line, the signal level needs to be converted by a
converter (SAMSON's cable converter 1400-7308).
Fig. 7 · Network structure
66
EB 5474 EN
GLT
RS 232C
TROVIS 5474
RS232
RS 232C
RS485
RS 485
RS232
RS485
TROVIS 5474
RS232
RS485