Siemens Simatic S7-400 - Page 130

For the connecting cables you require the following male connectors:
• At the CP 440 end: 15-pin sub D male connector with screw-locking
• At the communication partner: 15-pin sub D male connector with screw-locking
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Figure 11-2 X27 Cable for CP 440 - CP 340/CP 341/CP 440/CP 441 for RS 485 Operation (Two-Wire)
Note
The previous 󹪝gure shows the wiring if you want to make the connecting cable yourself. In
both RS 485 mode (two wire) and RS 422 mode (four wire) you can also use Siemens
connecting cables. The 󹪝gure below illustrates the internal wiring in the connecting cable.
The jumpers 2-4 and 9-11 are "installed" by parameter assignment of the CP.
Connecting cable X 27 (S7 (CP 440) - CP 544, CP 524, CPU 928B, CPU 945, CPU 948)
The 󹪝gure below illustrates the cable for a point-to-point connection between a CP 440 and a CP
544, CP 524, CPU 928B, CPU 945, CPU 948 for RS 422 operation.
Connecting cables
11.2 Cables
Point-to-point connection CP 440 Installation and Parameter Assignment
130 Equipment Manual, 03/2022, A5E00057742-AE