Appendix
A.2 Connecting cable
SIMATIC RF120C
Operating Instructions, 02/2021, C79000-G8976-C328-03
47
A.2.2 Self-assembled cables
As an alternative to the preassembled standard cables, you can assemble cables individually
yourself. A reader connector with screw terminals is available for self-assembly (see the
relevant system manual). Cables and reader connectors can be ordered using the TIA
Selection Tool, the SIMATIC Ident Configuration Guide.
Maximum cable length
The readers (RS232) connected to the communication module can be operated with a
maximum cable length of 15 m.
In some situations, longer connecting cables up to 1000 m are possible for connection via
RS422. Please note that a transfer speed of 115.2 kBd can only be guaranteed for a max.
cable length of 700 m. The current consumption of the connected reader must, however, be
taken into account. You will find further information in the relevant system manuals.
Joining more than two cables to form a long cable should be avoided due to the additional
contact resistances.
Requirements for cables and connectors
You will need cables of the following specifications for self-assembled cables:
• 6 x 0.25 mm
2
• L-YC11Y 6 x 1 x 0.25
50 m: 6GT2090-4AN50
120 m: 6GT2090-4AT12
800 m: 6GT2090-4AT80
You can use the following M12 connectors:
• Reader-sided: M12/8-pin, female
6GT2090-0BD00
D-sub connectors can be obtained from the relevant specialist dealers.
Pin assignment
You will find the pin assignment in the section "Pinout of the D-sub socket (Page 20)".
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