Application - Vaillant 0-10 V VR 34 Installationsanleitung

3 Description of the appliance
3.3

Application

The Vaillant VR 34 0-10 V interface is used
when a BEMS system is to be connected to a
Vaillant boiler with an eBUS interface. It con-
verts the voltage applied to the "I" terminal
into a temperature target value for the boiler.
Terminal "F" can be used to signal an error in
the boiler (24 V). The error signal persists
until the error has been removed and the
boiler has been reset. A 24 V relay drawing a
maximum current of 30 mA can be connected
between the "F" terminal and "24 V".
6
100
90
80
70
60
50
40
30
20
10
0
0 2
Fig. 3.1 Characteristic of 0-10 V interface
h Note
The chassis terminal is at earth po-
tential.
Installation instructions - Interface 0-10 V VR 34 0020017083_02
Curve 10 V-Modul
4 6 8 10
Input voltage
up
12
down