SYStronics TIC-4M, Руководство пользователя, Страница: 21 / 23

TIC-4M MANUAL
21
Cable shield treatment
The cables that require shielding are those that are driven by the inverter and special motors. We
recommend using a shielded cable as shown in the figure below where there is a lot of noise or precise
signal is required.
Precautions
Prepare for shielding Shield electrical wiring
Duct section separation
You should classify it as noise sources and noise interference rather than using convenience or clean wiring
as a reference. Regarding Noise of Cable Wiring Noise is judged to be a color line as ducts of a wiring which
is judged to be a clean signal line by using a "gray" line duct and ducts of a noise generating wiring by using
a duct of a "black" line This helps the wiring technician to isolate and manage the cables correctly.
Isolation work for panel cable noise
1. It is possible to install close to the line where the noise is generated and the line where the noise is
generated by placing a plated steel barrier.
2. If you need a lot of noisy power in area A, it is recommended to use shield cable through area B line.
3. As in the case of a cable consisting of A-zone horizontal line, it is necessary to avoid loops because
loops are formed centering on control microcomputer (loops cause high frequency of RF characteristic).
4. There must be no ground potential difference between the distributor panel and the main panel.
Connecting as much wire as possible helps to bring the ground potential close to 0V)
5. If possible, ground the shield at the panel entrance, as data and communication cables may contain noise
in the shield. Also, the data / communication cable and the power cable must be isolated and installed.
Noise Generating
Duct
Noise Free Duct
Plated Steel
Barrier
PWM /
DRIVER MC
PWM /
MOTOR MC
Noise Filter
PLC MC
Controller
Relay
Output
Terminal
Block
Power
Terminal
Block
Trans /
Power
A section B section