NOTE
All electrical connections must be carried out by
an authorised electrician.
Electrical installation and wiring must be carried
out in accordance with national provisions.
The main product must be disconnected from the
power supply when installing SAM S42.
• To prevent interference, sensor cables to external connec-
tions must not be laid close to high voltage cables.
• The minimum area of communication and sensor cables
to external connections must be 0.5 mm² up to 50 m, for
example EKKX, LiYY or equivalent.
• SAM S42 restarts after a power failure.
The electrical circuit diagram is at the end of this Installer
handbook.
Cable lock
Use a suitable tool to release/lock cables in terminal blocks.
Overview accessory board (AA5)
ON
1 2 3 4 5 6 7 8
-X9
-X2
24 20212223 1516171819 1011121314 56789 1
1
N
L
PE
PE
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
9
234
-X8
-X4
-X10
-X1
Connecting communication
SAM S42 contains an accessory board (AA5) that connects
directly to the main product’s PCB (terminal block AA2-X30).
If several accessories are to be connected, or are already
installed, the boards are connected in series.
Because there can be different connections for accessories
with accessory board (AA5), you should always read the in-
structions in the manual for the accessory that is to be in-
stalled.
B
A
GND
+12V
AA2-X30
1 2 3 4
AA5-X4
1
2
3
4
5
6
7
8
A
B
GND
A
B
GND
AA5-X4
1
2
3
4
5
6
7
8
A
B
GND
A
B
GND
Main product
Accessory 1
Accessory 2
Supply
SAM S42 is connected to a earthed single-phase wall socket
or a permanent installation. For permanent installations,
SAM S42 must be preceded by a circuit breaker with at least
a 3 mm breaking gap.
Connection of external frost
protection damper (QN42)
For connection of external frost protection damper (QN42),
see the Installer Manual for the main product.
17Chapter 5 | Electrical connectionsSAM S42
Electrical connections
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