24
www.eta.co.at
Circuit board EM-C4
Electrical connections
6.3
Circuit board EM-C4
Terminals marked with the
symbol are not factory pre-wired.
Terminal
Function
Default assignment
CAN Node CAN-Bus node switch
Position "7" for fresh water module "33"
Position "9" for fresh water module "44"
F1
Fuse T 3,15 A (Mains power input)
S100
Supply 230 V
Mains power input
S101
230 V output
Buffer pump and admixing pump
S102 LA
230 V output
Circulation pump (optional)
S102 LZ
230 V output
Motor ball valve for cascade systems (if there are
several fresh water modules)
From factory, this output is intended for motor ball
valves of cascade systems in order to activate
the subsequent fresh water module (also referred to
as "Slave" module).
This output can also be used for a solenoid valve in
order to turn off the heater side of the fresh water
module in case this is not connected hydraulically
decoupled. See chapter
3.4 "Information for installa-
tion"
.
S103
230 V input
On the factory side, the contacts "NC" and
"COM" are connected (bridged), because
otherwise all 230 V outputs are locked.
S600 T1
Temperature input
Primary flow
S600 T2
Temperature input
Primary return
S600 T3
Temperature input
Free (can be used for buffer)
S600 T4
Temperature input
Free (can be used for buffer)
S600 T5
Temperature input
Potentiometer for the hot water temperature
S600 T6
Temperature input
Hot water
