Siemens LMV5 Series Basic Documentation page 237

Speed feedback signal
Note
Speed input
X70
Safe segregation between
mains voltage and
protective extra low-voltage
Sensor disk
Speed sensor
Selection of fan motor
Siemens Building Technologies
HVAC Products
The motor's speed can be acquired with different types of sensors. To detect the
motor's direction of rotation with a sensor, a sensor disk with angular steps of 60°, 120°
and 180° is used. The sensor disk generates pulse intervals of different length.
Acquisition of speed is safety-related!
We recommend to use the accessory set AGG5.310.
To enable the acquired speed to be standardized to the range of 0...100 %, the speed
that corresponds to 100 % must be parameterized (→ «Standardization of speed»).
Motor speed:
100 % speed:
Sensor:
Power supply:
Switching current:
Cable length:
All inputs and outputs of the VSD module comply with the requirements for
protective extra low-voltage. Hence, the mains voltage section must strictly be
segregated!
Sensor disk and speed sensor can be ordered in the form of accessory set AGG5.310.
34 0,1
ø 94
Threaded hole
M8x15 at end
End of fan
of drive shaft
motor drive
shaft
Screw
(wrench size 22)
Cup spring
Sensor disk
1. Motor supplier: Version with threaded hole M8x15
2. Standard motor plus extra machining (drilling hole and cutting thread M8x15)
Basic Documentation LMV51...
17 Addendum 3: Variable speed drive (VSD) module
300...6300 1 / min
1350...6300 1/ min
Inductive sensor to DIN 19234 or open collector (pnp)
U < 4 V, U > DC 15 V
CEsat CEmin
DC 10 V, max.15 mA
> 10 mA
max. 100 m (sensor line must be run separately!)
Number of protrusions:
Angular steps:
Accuracy:
7550z05/0702
Threaded plate
7550z06e/0702
Protective cover
of fan motor
Min 7
Assembly must be made according
to Mounting Instructions M7550.5
3
60°, 120°, 180°
± 2°
Sensor support
secured with:
4 screws M3x10 DIN 84
+ 4 spring washers M3
Sensor with
thread M12x1
Nut M12x1
(wrench size 17)
CC1P7550en
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01.10.2003