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Building Technologies Division CC1N7550en
Industry Sector 24.05.2011
Function of VSD (cont´d)
To acquire the amount of fuel consumed, up to 2 fuel meters can be connected. As-
signment to the type of fuel is fixed. To adapt the system to different types of fuel me-
ters, assignment of the number of pulses and the resulting fuel throughput must be pa-
rameterized.
Type of sensor: Inductive sensor to DIN 19234 (Namur) or
open collector (pnp) with UCE-sat <4 V,
UCEmin >DC 15 V or Reed contact
Frequency: ≤ 300 Hz
Pulses / l or gal, m
3
: ≤ 9999.9999 (to be parameterized)
Pulses / ft
3
: ≤ 999.99999 (to be parameterized)
Power supply: DC 10 V, max. 15 mA
Switching current: >10 mA
The VSD is controlled via a current interface, which can be switched between 0...20 mA
and 4...20 mA.
If the VSD requires a DC 0...10 V input signal, a resistor of 500 Ω ±1% must be con-
nected to its input in parallel.
LMV5... system → VSD
Both functional tests with the LMV5... system were conducted and successfully com-
pleted with the following types of VSDs:
Siemens: - Micromaster 440
Danfoss: - VT2807
In operation, VSDs produce electromagnetic interference.
For this reason – to ensure EMC of the entire system – the instructions given by the
manufacturers must be observed:
Siemens: - Operating Instructions
→ EMC-compatible installation
Danfoss: - Technical Brochure → Radio Interference Suppression Filters
- Data Sheet of Danfoss EMC filter for long motor cables
&
Note!
When using other types of VSDs, compliance with EMC regulations and correct func-
tioning will not be ensured!
Fuel meter
Fuel meter input
X71 / X72
Configuration of
interface
Note
Functional tests
EMC
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