Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 50

Installation
Electrical Connections
Demand input / output connections
DIN rail X2
PCB ZPK 2.02
Legend
A Jumper for output parameter settings s;Ö,
factory setting: open
50
(continued)
Vitoligno 300-C Installation/Service
Legend
A External demand (dry contact) - must be coded,
refer to coding 1 address 44
B 0-10VDC or 0-20 mA input signal
C 0-10VDC output signal
Output reduction
Input signal limit boiler max. operating input
With regard to the function, please note:
If a current signal is required at s;Ö, close jumper A.
X4 Jumper
Jumper A
open:
for output
Voltage signal
s;Ö
0...10V
VDC
mA
X4 Jumper
closed:
Current signal
0...20 mA