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TECHNICAL DESCRIPTION
7.7
Connection of power supply
If ULTRAFLOW® 54 is mounted with a galvanically coupled output module and connected to MULTICAL®, the flow sensor
is supplied by the calculator. Therefore, the flow sensor must not be fitted with a supply of its own.
ULTRAFLOW® 54 may be connected to other calculators via the galvanically separated output module only, and the flow
sensor must, therefore, be fitted with a supply module or battery.
Supply module and battery are connected to the two-pole connector on the output module.
Battery supply
ULTRAFLOW® 54 is fitted with a D-cell lithium battery with connector. The battery plug is connected to the output
module.
Optimal battery lifetime is obtained by keeping the battery temperature below 30 °C, e.g. by wall mounting the
electronics box.
The voltage of a lithium battery is almost constant throughout the lifetime of the battery (approx. 3.65 V). Therefore, it
is not possible to determine the remaining capacity of the battery by measuring the voltage.
The battery cannot and must not be charged and must not be short-circuited.
The battery supply may only be replaced by a corresponding lithium battery with connector from Kamstrup A/S. Used
batteries must be handed in for approved destruction, e.g. at Kamstrup A/S. (See Kamstrup document 5510-408, "Lithium
batteries - Handling and disposal").
Mains supply modules
The mains supply modules are protection class II and are connected to the output module via a small two-wire cable with
plugs. The modules are powered via a two-wire mains supply cable (without earth connection) through the cable
connector of the electronics box. Use supply cable with an outer diameter of 4.5-10 mm and ensure correct stripping of
insulation as well as correct tightening of cable connection (see paragraph 7.7.4).
Max. permitted fuse: 6 A
230 VAC
This PCB module is galvanically separated from the mains supply and is
suitable for direct 230 VAC mains installation. The module includes a
double-chamber safety transformer, which fulfils double-isolation
requirements when the cover is mounted on the electronics box. Power
consumption is less than 1 VA or 1 W.
National regulations for electric installations must be observed. The 230
VAC module can be connected/disconnected by the district heating
station's personnel, whereas the fixed 230 VAC installation to the main
electrical panel must be carried out by an authorized electrician.
24 VAC
This PCB module is galvanically separated from the 24 VAC mains supply and
is both suitable for industrial installations with joint 24 VAC supply and
individual installations, which are supplied by a separate 230/24 VAC safety
transformer in the main electrical panel. The module includes a double-
chamber safety transformer, which fulfils double-isolation requirements
when the cover is mounted on the electronics box. Power consumption is
less than 1 VA or 1 W.
National regulations for electric installations must be observed. The 24 VAC
module can be connected/disconnected by the district heating station's
28
Kamstrup A/S · Technical description · 5512-876_M1_GB_12.2020
ULTRAFLOW® 54 DN150-300
Figure 22. 230 VAC supply module.
Figure 23. 24 VAC supply module.
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