Activate the meter(s) in menu 7.2 - "Accessory settings"
and then set the desired value ("Energy per pulse" or "Pulses
per kWh") in menu 7.2.19 -"Pulse energy meter".
Load monitor
Integrated load monitor
S735 is equipped with a simple form of integrated load
monitor, which limits the power steps for the electric addi-
tional heat by calculating whether future power steps can
be connected to the relevant phase without exceeding the
current for the specified main fuse. In those cases where
the current would exceed the specified main fuse, the power
step is not permitted. The size of the property’s main fuse
is specified in menu 7.1.9 - "Load monitor".
COMMUNICATION
Connecting accessories
Instructions for connecting accessories are provided in the
manual accompanying the accessory. See section "Accessor-
ies" for a list of the accessories that can be used with S735.
Connection for communication with the most common ac-
cessories is shown here.
Accessories with accessory board (AA5)
Accessories with accessory board (AA5) connect to terminal
block AA2-X30:1, 3, 4 in S735.
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
Accessory 1
S735
Accessory 2
Network cable for myUplink (W130)
In instances when you want to connect to myUplink using
a network cable instead of via wifi.
The network cable can be routed without removing the air
treatment unit.
1. Connect the shielded network cable to the display.
2. Route the network cable to the top of the heat pump’s
heater unit.
3. Follow the flow meter’s cable out at the rear.
SELECTABLE OUTPUTS/INPUTS
S735 has software-controlled AUX inputs and outputs for
connecting the external switch function (contact has to be
potential-free) or sensor.
In menu 7.4 - "Selectable in/outputs", you select the AUX
connection to which each function has been connected.
For certain functions, accessories may be required.
TIP
Some of the following functions can also be activ-
ated and scheduled via menu settings.
Selectable inputs
Selectable inputs on the base board (AA2) for these func-
tions are AA2-X28:3-11. Each function connects to any input
and GND (AA2-X29).
6 7
8
54
3
AUX4
AUX5
AUX6
AUX3
AUX2
AUX1
AA2-X28
AA2-X29
GND
The example above uses the inputs AUX1 (AA2-X28:3) and AUX2 (AA2-X28:4).
25Chapter 5 | Electrical connectionsNIBE S735
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