5.2.2 Countermeasures against Noise
The SERVOPACK is designed as an industrial device. It therefore pro-
vides no measures to prevent radio interference. The SERVOPACK uses
high-speed switching elements in the main circuit. Therefore peripheral
devices may be affected by switching noise.
If the equipment is to be used near private houses or if radio interference
is a problem, take countermeasures against noise.
The SERVOPACK uses microprocessors. Therefore, it may be affected by switching
noise from peripheral devices.
To prevent the noise from the SERVOPACK or the peripheral devices from causing mal-
functions of any devices, take the following countermeasures against noise as required.
n Install the input reference device and Noise Filter as close to the SERVOPACK as
possible.
n Always install a Surge Absorber for relays, solenoids, and Magnetic Contactor coils.
n Do not place the following cables in the same duct or bundle them together. Also,
separate the cables from each other by at least 30 cm.
– Main Circuit Cables and I/O Signal Cables
– Main Circuit Cables and Host Controller Cables
– Main Circuit Cables and Encoder Cables
n Do not share the power supply with an electric welder or electrical discharge
machine. If the SERVOPACK is placed near a high-frequency generator, install Noise
Filters on the input side on the Main Circuit Power Supply Cable and Control Power
Supply Cable even if the same power supply is not shared with the high-frequency
generator. Refer to the following section for information on connecting Noise Filters.
Ä
‘Noise Filters’ page 87
n Implement suitable grounding measures. Refer to the following section for information
on grounding measures.
Ä
Chap. 5.2.3 ‘Grounding’ page 90
You must attach Noise Filters in appropriate places to protect the SERVOPACK from the
adverse effects of noise. The following is an example of wiring for countermeasures
against noise.
Noise Filters
Sigma-7 Series SERVOPACKs
Wiring and Connecting SERVOPACKs
Wiring and Connecting SERVOPACKs > Countermeasures against Noise
| | PROFINET Communications - SIEP YEUOC7P 02A Revision 0 | en | 87
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