9
Communication
The TROVIS 5477 Ventilation Controller can communicate with a building management sys-
tem (GLT) over the serial system bus interface. A complete control system can be set up using
an appropriate software for visualization and communication.
The following communication versions are possible:
Operation with a modem for a dial-up line to the system bus interface RS-232
Communication is automatically established only when faults in the plant occur. The control-
ler works autonomously, yet it can be dialed over the modem for data retrieval at any time,
and influenced, if necessary. The use of a modem connecting cable (1400-7139) is recom-
mended.
Operation with a modem for a dedicated line to the system bus interface RS-232
Communication is established constantly over a dedicated line using two dedicated line mo-
dems. This version is used to bridge long distances or for the use of other signal level con-
verters. The controller and modem can also be connected using a modem connecting cable
(1400-7139).
Operation with a four-wire bus to the system bus interface RS-485
The signal level must be converted by a converter (SAMSON TROVIS 5484) for the connec-
tion between PC and bus line.
The TROVIS 5477 Ventilation Controller is equipped with either a RS-232-C or a RS-485 in-
terface depending on the order. It is not possible to change the interface later.
EB 5477 EN
79
Communication
Fig. 26 · Network structure