Siemens LMV5 Series Manual page 23

Function of VSD (cont´d)
Fuel meter
Fuel meter input
X71 / X72
Configuration of
interface
Note
Functional tests
EMC
Building Technologies Division
Industry Sector
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:
Frequency:
3
Pulses / l or gal, m :
3
Pulses / ft :
Power supply:
Switching current:
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:
- Micromaster 440
Siemens:
- VT2807
Danfoss:
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:
- Operating Instructions
Siemens:
→ EMC-compatible installation
- Technical Brochure → Radio Interference Suppression Filters
Danfoss:
- 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!
Inductive sensor to DIN 19234 (Namur) or
open collector (pnp) with U
U >DC 15 V or Reed contact
CEmin
≤ 300 Hz
≤ 9999.9999 (to be parameterized)
≤ 999.99999 (to be parameterized)
DC 10 V, max. 15 mA
>10 mA
<4 V,
CE-sat
CC1N7550en
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24.05.2011