Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual page 110

Additional information
System components
Connecting several remote control units
When connecting several remote controls to the control unit, install a terminal box on site.
Version 1
C
A
145
A To control unit
B Terminal box (on site)
C Vitotrol 1
D Vitotrol 2
E Vitotrol 3
110
(continued)
D
max. max.
15 m / 50 ft 15 m / 50 ft
On-site connection via terminal box:
Connect in accordance with the
diagram.
The total length of all KM BUS cables
should be limited to 50 m / 164 ft.
E
max.
15 m / 50 ft
B