Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors page 161

Electronics module M2IO connection scheme...
S1 Rotary switch
TS1 % A Top cylinder temperature sensor
TS2 B Bottom cylinder temperature sensor
%
TS3 No function
TS4 System return temperature sensor
aJ
TS5 No function
X... Electrical interfaces
A 3-way valve stepper motor
dÖ
B 3-way valve stepper motor
dÖ
Power supply
fÖ
Connection and wiring diagram
(cont.)
Mains voltage output
fÖ A
PlusBus
jF
To heat management unit gas condensing
A
module (plug
aBH
To heat management unit gas condensing
B
module (plug jF
PlusBus accessories
C
Fuel cell 3-way valve
D
Gas condensing boiler 3-way valve
E
)
)
161