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Installation and Configuration
Ensemble CP
2.1.4. Minimizing Conducted, Radiated, and System Noise
The Ensemble CP generates conducted (AC line) and radiated noise. Conducted emissions are minimized
by using line filters and should be located as close to the drive as possible for maximum effectiveness. User
connections to the product must be made using shielded cables with metal D-style connectors and back
shells. The shield of the cables must be connected to the metal back shell in order for the product to conform
to radiated emission standards.The Ensemble CP is a component designed to be integrated with other
electronics. EMC testing must be conducted on the final product configuration.
Ferrite beads can be used on the motor leads to reduce the effects of PWM noise.
Table 2-6:
Ferrite Noise Suppression Numbers
Wire Size
Aerotech P/N
Third Party P/N
13.3 mm
2
(#6 AWG)
N/A
#2643626502 Elna Fair-Rite Products
8.3 mm
2
(#8 AWG)
ECZ00285
#2643626502 Elna Fair-Rite Products
2.0 mm
2
(#14 AWG)
EIZ01027
#2643002402 Elna Fair-Rite Products
1.3 mm
2
(#16 AWG)
EIZ01025
#2643250402 Elna Fair-Rite Products
0.8 mm
2
(#18 AWG)
EIZ01001
#2673000801 Elna Fair-Rite Products
0.5 mm
2
(#20 AWG)
EIZ01001
#2673000801 Elna Fair-Rite Products
Aerotech's UFM-ST AC line filter and isolation transformers connected to the motor supply AC input are also
effective in reducing PWM generated noise and improving performance (refer to
Section 2.1.3.
).
Table 2-7:
UFM-ST Electrical Specifications
Specification
Value
Input Voltage Range
0-240 VAC
Output Voltage Range
0-240 VAC
Maximum Continuous Current
8 A
rms
with convection cooling
10 A
rms
with forced air cooling
Frequency
50/60 Hz
Phases
Single Phase
Leakage Current
1.1 mA (max)
Fuse Protection
Internal 10 A fuses on AC1 and AC2 inputs
TO MAINS
TO DRIVE
AC1
AC2
TB1-1
F2
F1
Q
VR
2
V2
0
E3
8
5
P
JP4
Q
VR
1
V2
0
E3
8
5
P
JP3
10 ASB 3AG
LINE
INTERNAL FILTER
COMPONENTS
LOAD
10 ASB 3AG
TB1-2
GND TB1-3
GND
TB2-3
AC1
AC2
TB2-1
TB2-2
Figure 2-10:
AC Line Filter (UFM-ST)
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Chapter 2
35
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