
Guidelines for Installing Networked Automation Systems in Buildings
7-20
SIMATIC NET Twisted-Pair and Fiber-Optic Networks
C79000-G8976-C125-02
How to Read the Table
To check how cables of different types must be laid, follow the steps outlined
below:
1. Find the cable type of the first cable in column 1 (cables for ...).
2. Find the cable type of the second cable in the relevant section in column 2 (and
cables for ...).
3. Read the guidelines for laying the cables in column 3 (lay ...).
Table 7-1 Cabling Within Buildings
Cables for ... and cables for ... lay ...
Bus signals, shielded
(PROFIBUS, Industrial Ethernet)
Bus signals, unshielded
(AS-Interface)
Bus signals, shielded
(PROFIBUS, Industrial Ethernet)
Bus signals, unshielded
(AS-Interface)
Data signal, shielded
(PG, OP, printer, counter inputs
etc.)
Analog signals, shielded
DC voltage
(v 60 V), unshielded
Process signals
(v 25 V), shielded
AC voltage
(v 25 V), unshielded
Monitors (coaxial cable)
In common bundles or cable
channels
DC voltage
(u 60 V and v 400 V),
unshielded
AC voltage
(u 25 V and v 400 V),
unshielded
In separate bundles or cable
channels (no minimum clearance
required)
DC and AC voltage
(u 400 V), unshielded
Within closets:
In separate bundles or cable
channels (no minimum clearance
required)
Outside closets:
On separate cable paths with at
least 10 cm clearance
HF cables for transmitter high
level stages and transmitter
antennas with voltages from 10
to 1000 V
Lay HF cables in steel pipes with
multiple ground points; at least
30 cm clearance
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