Kollmorgen Mounting
SERVO
STAR
®
SP3 Power Block
9
Particular care should be used when layout of an enclosure is designed. Separate power wires
from small signal wires. The following guidelines highlight some important wiring practices to
implement:
1.
Control and signal cables must be separated from power and motor cables. Distance of
20cm (8 in.) is sufficient in most cases.
2.
Control and signal cables must be shielded to reduce the effects of radiated interference.
3.
When control cables must cross power or motor cables, they should cross at an angle of
90 degrees, if possible. This reduces the field coupling effect.
CE FILTERING TECHNIQUES
The SERVO
STAR
system (power block, drive, motor) meets the CE Mark standards stated in
the front of this manual. Apply proper bonding and grounding techniques, described earlier in
this section, when incorporating EMC noise filtering components to meet this standard.
Noise currents often occur in two types. The first is conducted emissions passed through ground
loops. The quality of the system-grounding scheme inversely determines the noise amplitudes in
the lines. These conducted emissions are of a common-mode nature from line-to-neutral
(ground). The second is radiated high-frequency emissions that are usually capacitively coupled
from line-to-line and are differential in nature.
To properly mount the filters, the enclosure should have an unpainted metallic surface. This
allows for more surface area to be in contact with the filter housing and provide a lower
impedance path between the housing and the back plane. The back panel should have a high
frequency ground strap connection to the enclosure frame and earth ground.
Input Power Filtering
The Danaher Motion Kollmorgen SERVO
STAR
electronic system components require EMI
filtering in the input power leads to meet the conducted emission requirements for the industrial
environment. This filtering blocks conducted-type emissions from exiting onto the power lines
and provides a barrier for power line EMI.
Adequately size the system. The type of filter must be based on the voltage and current rating of
the system and whether the incoming line is single- or three-phase. The implementation of the
EMI filter should be done in accordance with the following guidelines:
•
Filter should be mounted on the same panel as the drive.
•
Filter should be mounted as close as possible to incoming cabinet power.
•
When mounting the filter to the panel, remove any paint or material covering. Use an
unpainted metallic back panel, if possible.
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