148
EM-EA1 extension
Fig. 102
DI1
Digital input 1
DI2
Digital input 2
(no function)
DI3
Digital input 3 (no function)
0 - 10 V IN
0 - 10 V input (no function)
0 - 10 V OUT 0 - 10 V output (no function)
PWM1
Output, control voltage (no function)
S1
Rotary switch for subscriber number
Z1
230 V relay output with 230 V input
fÖ
Power supply
fÖ
A
Power supply for additional accessories
hH
Connection for fault message signalling
equipment (floating switching contact)
jF
PlusBus
Digital data input DI1
When the contact is closed, the gas condensing mod-
ule and fuel cell module are blocked. Fault message
output 66 is activated.
Function: External blocking with fault message
The external contact must be potential-free. When
connecting external contacts, observe the require-
ments of protection class II: 8.0 mm air and creep path
or 2.0 mm insulation thickness to live parts.
Output
hH
A fault message facility can be connected to output
hH
.
Rated current max. 1 A~
Relay output Z1
The following functions can be connected:
■
230 V fault message input (to digital input 1-L on
connector Z1) and system block. When the contact is
closed, the gas condensing module and fuel cell
module are blocked. Fault message output 66 is acti-
vated.
■
Fault message output (to digital input 1-L on connec-
tor Z1). Output 66 is activated.
The functions can be set via the commissioning assis-
tant.
Control functions
Venting program
During the venting program, the circulation pump will
be alternately switched on and off for 30 s over a
period of 20 min.
The 3-way diverter valve alternates between central
heating and DHW heating for a certain period of time.
The burner is switched off during the venting program.
Function description
External extensions (accessories)
5853335
Functions
