2. Wiring
112
[Reference 1] Caution When Connecting Multiple SCON Units to One Unit of Noise Filter
Caution: When connecting several units of SCON to one unit of noise filter, make sure
that each device in the equipment would not get any influence of noise. Also,
considering the case that they get influence of noise, ensure space so noise
filters or noise prevention component can be additionally allocated.
* The contents above are not something that guarantees normal operation of the
equipment. Check carefully in the actual operational conditions.
[Reference 2] Caution When Selecting Noise Filter
Consider two points as stated below when you select a noise filter.
Please contact the supplier of each noise filter for details.
1) Allowable Current : The power current
(Note 1)
of the controller should be in the range of the
allowable current of the noise filter.
◆
Allowable Current of Noise Filter ˃ Rated Current Amperage of Connected Controller
Note 1 : Rated Current Amperage of SCON = Motor Current Amperage +
Control Current Amperage
As the rated current amperage differs depending on the connected actuator
(motor), it is required to check in the section of 1.2.2 Current Amperage and
Heat Radiation for the necessary current value.
2) Attenuation Characteristics : A noise filter which possesses the similar attenuation
characteristics to the noise filter code stated in the previous
page should be selected. The attenuation characteristics of
each noise filter is open to the public by each supplier.
For example, shown below is the graph of the attenuation
characteristics of NAC-10-472 that IAI recommends.
NAC-10-472
■Attenuation Characteristics (Static Characteristics)
Frequency [MHz]
Normal Mode
Common Mode
Attenuation Volume [dB]
2.5.1
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