Nibe S2125, Installer Manual, Page: 29 / 64

Cascade connection
For cascade connection, connect terminal block X23 with
the next heat pump’s terminal block X22.
SMO S40
F212X
AA2:X23
AA2:X22 AA2:X22
AA2:X23
3
2
1
4
GND
GND
A
A
B
B
3
2
1
4
F212X
3
2
1
4
GND
GND
A
A
B
B
3
2
1
4
SMO S40
AA100:X9
A
GND
B
2
3
4
1
6
7
8
5
10
11
12
9
S2125 S2125
Control module
SMO 40
F2120
SMO
AA5 X4
3
2
1
4
GND
GND
A
A
B
B
GND A B
3
2
1
4
F2120
3
2
1
4
GND
GND
A
A
B
B
3
2
1
4
3 2 1 4 5
AA2:X23
AA2:X22 AA2:X22
AA2:X23
S2125 S2125
Control module
COOLING
S2125 can supply cooling with cooling supply down to +7°C.
Caution
DIP S1 position 4 must be changed to ON in order
to run cooling
CONFIGURATION USING DIP SWITCH
The communication address for S2125 to the indoor module
/ control module is selected on the base board (AA2). DIP
switch S1 is used for configuration of address and functions.
For cascade operation with SMO for example, addressing is
required. S2125 has the address 1 as standard. In a cascade
connection all S2125 must have a unique address. The ad-
dress is coded in binary.
NOTE
Only change the DIP switches position when the
product is not powered.
Default set-
ting
Address
(com) Slave DIP S1 position
(1 / 2 / 3)
OFF 01 Slave 1 off / off / off
OFF 02 Slave 2 on / off / off
OFF 03 Slave 3 off / on / off
OFF 04 Slave 4 on / on / off
OFF 05 Slave 5 off / off / on
OFF 06 Slave 6 on / off / on
OFF 07 Slave 7 off / on / on
OFF 08 Slave 8 on / on / on
Default set-
ting
Function Setting DIP S1 position
OFF Permits cooling ON 4
Default setting Setting DIP S2 position
OFF OFF 1
OFF OFF 2
OFF OFF 3
OFF OFF 4
Switch S3 is the reset button that restarts control.
CONNECTING ACCESSORIES
Instructions for connecting accessories can be found in the
installation instructions provided for the respective access-
ory. See section "Accessories" for a list of the accessories
that can be used with S2125.
29 Chapter 5 | Electrical connections NIBE S2125