AUMA SVM 05.1, Руководство по эксплуатации

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Type of current, mains voltage and mains frequency must match the data on the
motor name plate.
Cable installation in ac-
cordance with EMC
Signal and fieldbus cables are susceptible to interference.
Motor cables are interference sources.
●
Lay cables being susceptible to interference or sources of interference at the
highest possible distance from each other.
●
The interference immunity of signal and fieldbus cables increases if the cables
are laid close to the earth potential.
●
If possible, avoid laying long cables and make sure that they are installed in
areas being subject to low interference.
●
Avoid long parallel paths with cables being either susceptible to interference or
interference sources.
●
For the connection of remote position transmitters, screened cables must be
used.
Connecting cables
●
For device insulation, appropriate (voltage-proof) cables must be used. Specify
cables for the highest occurring rated voltage.
●
It is advised to use a shielded cable.
●
For connecting cables exposed to UV radiation (outdoor installation), use UV
resistant cables.
●
The cross-sectional area of every protective earthing conductor which does not
form not part of the supply cable or the cable enclosure, shall, in any case, not
be less than:
-
With mechanical protection: minimum 2.5 mm²
- Without mechanical protection: minimum 4 mm²
Fieldbus cables
Only cables complying with the recommendations of EIA 485 specifications should
be used for Modbus wiring.
Cable recommendation:
Impedance:
135 to 165 Ohm, at a measurement frequency
between 3 and 20 MHz
Cable capacity:
< 30 pF per metre
Wire diameter:
> 0.64 mm
Wire cross section:
> 0.34 mm², corresponding to AWG 22 or bigger
Loop resistance:
< 110 Ohm per km
Screening:
CU shielding braid or shielding braid and shielding
foil
Prior to installation, please note:
●
Connect maximum 32 devices to one segment.
●
If more devices are to be connected:
-
Connect several segments using repeaters.
●
Respect a distance of minimum 20 cm between the fieldbus cable and other
cables.
●
If possible, fieldbus cables should be laid in a separate, conductive, and earthed
cable tray.
●
Make sure to avoid potential differences between the individual devices on the
fieldbus (perform an equipotential earth bonding).
14
SVM 05.1 – SVM 07.5 / SVMR 05.1 – SVMR 07.5
Electrical connection Modbus RTU