Operating instructions

Instruction SONO 1500 CT
VI.SH.K1.02
Produced by Danfoss A/S © 01/2015
6.0 Wiring energy calculator type INFOCAL 8
Once the ow sensor has been installed, the component must be
sealed and taken into operation.
Bleed the system until the measurements are steady.
7.0 Start-up operation
blue
white
brown
SONO 1500 CT INFOCAL 8
terminal
Vcc (brown)* 9 (+)
Pulse (white) 10
GND (blue) 11 (−)
* Connect only if SONO 1500 CT with external supply
8.0 Communication
The ow sensor has two outputs for connection to a heat meter.
- Useful pulse
- Test pulse (high resolution for testing laboratories)
The electrical data of the useful pulse are dened as:
Designation Value
External power supply UC < 30 V
Output current
< 20 mA with a residual
voltage of < 0.5 V
Open Collector (Drain)
Cable length to the
partial unit energy meter
< 10 m
Output frequency battery supplied < 20 Hz
Output frequency with
external power supply
< 150 Hz
Useful pulse value
10 ml ... 5000 l (dependent
on the rated value and
power supply)
Pulse duration
1  250 ms ± 10 %; Pulse
duration < Pulse pause
Potential-free contact (optional)