VU.IG.B9.02
© Danfoss | Energy Meters | 2019.03 | 7
Installation guide
SonoSelect and SonoSafe
2.6 Bifunctional meters
Bifunctional meter are for combined heating and cooling applications. Θ
hc
default value is 30°C it can be
configured with SonoApp.
-∆Θ
∆Θ
min
∆Θ
hc
∆Θ
hc
∆Θ
min
θ
hc
θ
hc
θ
Inlet
0
+∆Θ
No energy accumulation
Key
Heating
Cooling
2.7 Communication modules
Modules in general
To adapt the meter for various applications SonoSelect 10 and SonoSafe 10 features a slot for mounting
communication modules.
Each module features its own µ-controller.
Modules have their own parameter set which is saved in the module µ-controller flash memory. A local
copy of the energy meter parameters used for communication is stored in the module.
Modules with pulse input have the inputs stored in legal backup every 10 minute.
Power: Lithium Thionyl Chloride battery (half of AA size) or mains power supply (230V). In case of power
cuts on mains power the module has no power back up.
2 pulse in/outputs have common ground.
Modules are galvanically isolated from main Energy Meter circuitry
Wired M-Bus module with 2 pulse inputs
Once installed the meter will display the icon for wired communication and pulse inputs in loop 2 of the
display. Wired M-Bus is galvanically isolated from µ-controller and pulse inputs.
The two pulse inputs can be programmed independently of each other (see specification for pulse input
module).
M-Bus (primary)
Lithium Thionyl Chloride battery (half of AA size) or mains powered
M-Bus (secondary)
M-Bus supply
Baud rate supported
300, 2400, 4800, 9600
Communication protocol
According to EN1434-3 & EN13757-3
Battery life time
16+1 year
Addressing
Serial number:
sssss
vvNNy
yWW
ss
: Primary address,
yWWsssss
: Secondary address
ΔΘhc = ΔΘcutoff = 0.25K