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Building Technologies Basic Documentation LMV5... CC1P7550en
18 VSD module 22.05.2018
This output is used for delivering the preselected speed setpoint to the VSD.
Current: 0/4...20 mA ≡ 0...105% (↑ Standardization of speed)
Output load: max. 750 ς (burden), short-circuit-proof
Resolution: 0.1%
Cross-sectional area of wire: ″0.1 mm
2
This function is used to trigger safety shutdown as quickly as possible (within about 1
second) if great speed deviations are detected, or if speed = 0 is detected in operation.
This check is made in phase Ignition On 38 through Afterburn time 70.
The degree of deviation where quick shutdown shall take place can be set via
parameter TolQuickShutdown:
Checking is deactivated when 100% is entered as the tolerance value.
Parameter TolQuickShutdown
For details, refer to the description in chapter Digital inputs, section Fan contactor
contact (FCC) or FGR pressure switch (FGR-PS) X4-01.
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.
Attention!
Speed acquisition is safety-related!
We recommend using 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: 300...6300 1/min
100% speed: 1350...6300 1/min
Sensor: Inductive sensor to DIN 19234 or open collector (pnp)
U
CEsat
<4 V, U
CEmin
> DC 15 V
Power supply: DC 10 V, max. 15 mA
Switching current: >10 mA
Cable length: Max. 100 m (sensor line must be run separately!)
Analog output to
the VSD X73 pin 4
Quick shutdown in the
event of great speed
deviations during
operation
Monitoring with flue gas
recirculation pressure
switch (FGR-PS)
Speed feedback signal
Speed input
X70
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