15P0056B1
APPLICATION MANUAL
AMS90/1
14/17
EMI CHARACTERISTICS AND INPUT FILTER
EMI CHARACTERISTICS AND INPUT FILTER
Radio-frequency interferences (RFI) can be generated in the area where the drive is installed. The
interferences can occur both on the air (irradiated interferences), and through the power and signal cables
(conducted interferences). Sometimes, due to these interferences, the drive can operate improperly, even
if the AMS90/1 unit is provided with a high noise immunity and complies with the EMI standards. Also, the
drive itself can produce interferences due to switching over of power semi-conductors representing its
output stage.
A malfunction can be detected in the devices installed close to the drive or connected at the same supply
or earth conductor.
To eliminate any interference that can affect the drive operation, proceed as follows:
- keep the drive power cables separated from the signal cables;
- use shielded cables for drive control signals and connect the shield to ground, as shown on the
connection diagram; for shield grounding, choose the shortest connection, that should be direct and
without any intermediate connection;
- always install anti-noise filters on the coils of remote control switches, solenoid valves, etc.
IMMUNITY TESTS OF AMS90/1
Electrostatic discharges:
level 3 EN 61000 - 4 – 2
Burst:
level 3 EN 61000 - 4 – 4
Surge:
level 3 EN 61000 - 4 – 5
Radio-frequency electromagnetic fields:
10V/m IEC 1000 - 4 - 3
If malfunctions are detected in the devices installed close to the drive, take the following precautions:
- install the drive input filter;
- keep the drive power cables separated from any other cable;
- use shielded cables to connect sensors, instruments, etc.
- install any noise-sensitive devices as far as possible away from the drive.
WARNING!
THE CONNECTION CABLES BETWEEN FILTER AND DRIVE SHOULD BE AS
SHORT AS POSSIBLE.
Here is a list of the filters recommended for the different drive models, so that the conducted and irradiated
interferences are included within the levels conforming to EN55011 class B and VDE0875G (civil
environment) standards.
On the contrary, these filters are not required for industrial environments,
where the switching inductance is enough.
Drive type
Filter type
Rated voltage (V)
Rated current (A) Filter code
AMS90/1.10 supp. 230Vac max
FLTA-B 1,5M
250 at 50/400 Hz
2 x 12
AC1710220
AMS90/1.20 supp. 230Vac max
FLTA-B 2,2M
250 at 50/400 Hz
2 x 24
AC1710320
AMS90/1.30 supp. 230Vac max FLTA-B 11T (*)
460 at 50/60 Hz
2 x 30
AC1710305
AMS90/1.10 supp. 440Vac max
FLTA-B 4T
460 at 50/60 Hz
3 x 10
AC1710105
AMS90/1.20 supp. 440Vac max
FLTA-B 11T
460 at 50/60 Hz
3 x 30
AC1710305
AMS90/1.30 supp. 440Vac max FLTA-B 11T (*)
460 at 50/60 Hz
3 x 30
AC1710305
(*) Use just two of the three lines available on the filter.
