Assembling and Installing Systems

A-17

AutomationSystem S7-400 Hardwareand Installation
A5E00850741-01
A.7 Cabling Inside Buildings
Introduction

Inside buildings, clearances must be observed between groups of different cables

to achieve the necessary electromagnetic compatibility (EMC). TableA-2 provides

you with information on the general rules governing clearances to enable you to

choose the right cables.

How to Read the Table

1. Lookup the type of the first cable in column 1 (Cables for ...).

2. Lookup the type of the second cable in the corresponding field in column 2

(and Cables for ...).

3. Readthe routing specifications in column 3 (routing ...).

TableA-2 Cabling Inside Buildings
ConnectCables for ... and Cables for ... Run ...
LAN signals, shielded
(SINEC L1, PROFIBUS DP)
Data signals, shielded
(programming devices, operator
panels, printers, counter inputs,
etc.)
Analog signals, shielded
DC voltage
(≤60 V), unshielded
Process signals
(≤25 V), shielded
AC voltage
(≤25 V), unshielded
Monitors (coaxial cable)
LAN signals, shielded
(SINEC L1, PROFIBUS DP)
Data signals, shielded
(programming devices, operator
panels, printers, counter inputs,
etc.)
Analog signals, shielded
DC voltage
(≤60 V), unshielded
Process signals
(≤25 V), shielded
AC voltage
(≤25 V), unshielded
Monitors (coaxial cable)
in common bundles or cable
ducts
DC voltage
(>60 V and ≤400 V), unshielded
AC voltage
(>25 V and ≤400 V),
unshielded
in separate bundles or cable
ducts (no minimum clearance
necessary)
DC and AC voltages
(>400 V), unshielded
Inside cabinets:
in separate bundles or cable
ducts (no minimum clearance
necessary)
Outside cabinets:
on separate cable racks with a
clearance of atleast 10 cm
(3.93 in.)