Overview Of Electrical Connections - Viessmann EM-EA1 Installation And Service Instructions Manual

Overview of electrical connections

DI2 Digital input 2
(no function)
DI3 Digital input 3 (no func-
tion)
0 - 10 V IN 0 - 10 V input (no func-
tion)
0 - 10 V OUT 0 - 10 V output (no func-
tion)
PWM1 Output, control voltage
(no function)
S1 Rotary switch for codes
!
Please note
Electronic assemblies can be
damaged by static loads.
Before beginning work, touch an
earthed object such as heating
or water pipes to discharge any
static.
Connect fault message facility to output hH
hH
Z1
1
?
f-] fÖ
A
? ?
L
?
N
(cont.)
230 V relay output with
Z1 fD
230 V input
Power supply
fÖ
Power supply for addi-
fÖ A
tional accessories
Connection for fault
hH
message signalling
equipment (floating
switching contact)
PlusBus
jF
Note
Apply strain relief to on-site cables.
Blank off unnecessary knockouts with
cable grommets (not cut out).
Rated current max. 1 A~
3