VentoVind PRO Special user manual
© Corroventa Avfuktning AB
2020.12
25 (39)
Checking and monitoring via ModBus RS485
RS485 (Building Automation)
VentoVind
™ is prepared with RS485 output for connection to central monitoring and control system
(Building Automation). RS485 is a common Mod Bus technology for serial data transfer that is both
simple and economical, but also very robust. At connection the VentoVi
nd™ control unit acts as a
SLAVE unit to the Modbus Master unit that acts as a central connection point in the house. Current
operating status can be read off and settings can be adjusted as necessary.
Recommended cable
To prevent the signal being interrupted by magnetic, electrical or electromagnetic interference a
shielded twisted pair cable of class A should be used. Only one cable per signal may be used for A and
B signals.
Connection to RS485
The signal cable is connected directly in the screw terminal marked Building Automation RS485 in the
VentoVind™ control unit. For a complete installation of the signal cable through the chassis on the
VentoVind control unit, use a model M20 type sealed fitting
Connection
Signal type
GND
Ground
B
RS485 B signal
A
RS485 A signal
+ 24 Volt DC
24volt DC
1200 - 115,200
Signal speed (Baud rate)
8
Data bits
1
Stop bit
No parity
1 - 254
ID address (ID=3 is default)
