Siemens Simatic CFU User Manual

11.3.2.8 CFU PA in aluminum housing: Connecting the cable shields of the PROFIBUS PA cables
The shields of the fieldbus cables must be connected to the functional earth FE. Use the shield
spring terminals mounted in the housing for this.
Pay attention to the bending radius of the fieldbus cables.
Shield spring terminals
One shield spring terminal can hold 2 fieldbus cables. With no load, securing with cable ties is
sufficient.
The shield spring terminal is suitable for cables with a diameter of 6 to 8 mm.
Tools required
Wire stripping tool
Procedure
To connect the cable shield, follow these steps:
1. Ensure that the insulation material of the fieldbus cable is removed in the area of the shield
spring terminal.
You can find information on this in the section "Preparing cables (Page 63)".
2. Connect the fieldbus cable to the CFU PA and press the fieldbus cable into the shield spring
terminal.
3. Secure the fieldbus cable with cable ties to the dedicated area of the shield spring terminal.
2
1
5
3
6
4
① Terminals (screw terminal or push-in termi‐
nal)
④ Insulation material removed (approx. 20 mm)
② Terminal block 8x1 ⑤ Shield spring terminal
③ Fieldbus cable to field device ⑥ Shielding bus
Compact Field Unit in the housing for use in a hazardous area
11.3 Configuration with SIMATIC CFU with aluminum housing
SIMATIC CFU
142 Commissioning Manual, 08/2019, A5E39252870-AD

Siemens Simatic CFU Specifications

General

Brand	Siemens
Model	Simatic CFU
Category	I/O Systems
Language	English