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General technical specifications
1.1 Installation and EMC guidelines
1.1.15
Cables
1.1.15.1
Overview
● All signal cables you install must be shielded. All cables assembled by users must be
wired with strain relief.
● Serial signal lines must be shielded. The shield must be bonded to a metalized connector
housing, as well as to the shielding busbar. The cable shielding may not be wired to pin 1
of the connector.
● The power cable (90-264 VAC) for the rack power supply does not require shielding. The
permitted operating voltage of the power cable used may not be less than the supply
voltage.
● Power supply cables for safety extra low voltages (e.g. 24 V DC) must be shielded. A
power supply cable that is routed via interface module must be bonded to the shielding
busbar as specified in section Wiring via interface module (Page 33).
● External power supply ground must be bonded to the equipotential busbar; refer to
"Practical application examples (Page 23)".
● Cables on system side and cables interconnecting the interface module with SIMATIC
● A minimum clearance of > 10 cm must be maintained between signal lines and power
cables carrying voltages less than 500 V AC and > 30 cm to power cables carrying
voltages of more than 1 kV AC.
32
TDC should not be routed through the same cable duct.
SIMATIC TDC hardware
System Manual, 12/2013, A5E01114865-07
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