Viessmann EM-EA1 extension - Connecting External Blocking: Fd; Connecting the Fault Message Input and Fault Message Output; Connection Without System Blocking Via 230 V Fault Message Input: Fd

11
Connecting external blocking: fD
? ?
fÖf-]
A
?
1
A B
fD
Fig. 7
A
Signal for external demand or external blocking
B
Junction box
If 230 V voltage is present at digital input 43-1, the
heat generator is blocked.
The message I.57 is shown.
Connecting the fault message input and fault message output
Connection without system blocking via 230 V fault message input:
fD
hH
[{]
fÖ
?
1
?
?
fD
A
B
?
N
L
Fig. 8
A
Fault message facility
B
Junction box
■
Fault message input 43-1 and conductor L of the
power supply at plug
fÖ
must be connected in
phase.
■
Rated current at floating fault message output
hH
:
Max. 1 A ~.
The fault message is active if 230 V voltage is present
at digital input 43-1. Floating fault message output
hH
is switched over from "Ö" to "S".
Installation sequence
Connecting external functions (cont.)
6131087
Installation