AUMA SA 07.2 Operation Manual page 28

Electrical connection
Potential of customer
connections
Safety standards
Connecting cables,
cable glands, reducers,
blanking plugs
Cable installation in ac-
cordance with EMC
Fieldbus cable
28
SA 07.2 SA 16.2 / SAR 07.2
Refer to Technical data for options of isolated potentials.
Safety measures and safety equipment must comply with the respectively valid
national on site specifications. All externally connected devices shall comply with
the relevant safety standards applicable for the place of installation.
We recommend using connecting cables and connecting terminals according
to rated current (I ) (refer to motor name plate or electrical data sheet).
N
For device insulation, appropriate (voltage-proof) cables must be used. Specify
cables for the highest occurring rated voltage.
To avoid contact corrosion, we recommend the use of sealing agents for cable
glands and blanking plugs made of metal.
Use connecting cable with appropriate minimum rated temperature.
For connecting cables exposed to UV radiation (outdoor installation), use UV
resistant cables.
For the connection of position transmitters, screened cables must be used.
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 parallel paths with little cable distance of cables being either susceptible
to interference or interference sources.
Only cables complying with the DeviceNet wire specification (www.odva.org) may
be used for a DeviceNet network. The fieldbus cable must be installed at a distance
of minimum 20 cm to other cables. If possible, the cable should be laid in a separate,
conductive, and earthed cable tray. Ensure absence of equipotential earth bonding
differences between the individual devices at DeviceNet (perform an equipotential
earth bonding).
Table 18:
Baud rate Maximum cable length
125 kbit/s 500 m
250 kbit/s 250 m
500 kbit/s 100 m
SAR 16.2 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive DeviceNet
Maximum cumulated
spur length
156 m
78 m
39 m