Viessmann EM-EA1 Installation And Service Instructions Manual page 21

Connection and wiring diagram
Fig. 21
DI1 Digital input 1
DI2 Digital input 2
DI3 Digital input 3
0 - 10 V IN Input 0 to 10 V
0 - 10 V OUT Output 0 to 10 V, no function
F4 Fuse 2 A (slow)
PWM1 Control voltage output, no function
S1 Rotary switch
Z1 230 V relay output, 230 V input
fD
Power supply
fÖ
A Power supply for additional accessories
fÖ
Floating switching contact (changeover
hH
contact) for connecting a fault message
facility or extractor hood
PlusBus
jF
Connection and wiring diagram
21