Appendix B: Connecting Cables - Siemens SIMATIC S7 CP340 Programming Manual

4 ASCII protocol communication
4.4.4 Equipment connection
Use standard RS232C cable to connect serial ports of CP441-2 interface1 and
computer. The detailed cable connecting method may be seen in CP441 Manual -

Appendix B: Connecting cables.

CP340/CP341/CP440/CP441 Communication and Programming
Entry-ID: 88867653, V1.0,
Fig. 55: Invoke SFB13 BRCV from OB1
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