Connecting The Field Bus To The Cfu - Siemens Simatic CFU Commissioning Manual

11.3.2.7

Connecting the field bus to the CFU

Introduction
The PROFIBUS PA cables are introduced into the enclosure by means of cable glands.
Figure 11-3
Basic procedure
You can find information on this in the section "Connecting a PROFIBUS PA field device
(Page 41)".
1. Preparing the cables (Page 45)
2. Connecting the cables
– Opening the enclosure
– Connecting spur lines to the terminal block (Page 44)
– Connecting cable shields (Page 122)
3. Closing the enclosure
4. Ensure that there is an appropriate strain relief for the cables outside the enclosure. Even
when installed in the enclosure, the cable glands do not serve as strain relief.
Note
Secure fieldbus cable with screw terminals (according to approval)
When screw terminals are used to secure the fieldbus cables, the following wiring direction
must be adhered to:
The FB connections may only be wired from below (from the direction of the rating plate).
SIMATIC CFU
Commissioning Manual, 07/2018, A5E39252870-AC
Compact Field Unit in the enclosure for use in a hazardous area
11.3 Configuration with SIMATIC CFU PA bundle with aluminum enclosure
Connecting the field devices: Spur lines on FB0 to FB7
121