1/15/2016 11:20 PM | |
Posts: 2 Rating: (0) |
Hi everyone! I need the schematics for the RS232 PPI (6ES7901-3CB30-0XA0) cable needed to program S7-200 PLCs. Thank you very much |
1/16/2016 12:42 AM | |
Joined: 9/27/2006 Last visit: 9/26/2024 Posts: 12283 Rating: (2685) |
Hello ahmed; The cable you are enquiring on is a RS-232 (9-pin COM port) to RS-485 converter for S7-200. You can have much information on this cable (and the USB/PPI version) in the following document, including the attached screenshot:
S7-200 System manual : (App. A, and from page 224) https://support.industry.siemens.com/cs/ww/en/view/1109582 This cable can operate from 9,6 kB to 115 kB, and has some dipswitches that allow for configuration. I have seen some operators use a standard industrial RS-232 to RS-485 converter to program a S7-200 PLC in the past; this can work because there is no protocol conversion necessary for PPI. However, please take into account the following caveat (from the system manual, p.224) if that is the path you intend to follow: Caution Using a non-isolated RS-485-to-RS-232 converter can damage the RS-232 port of your computer. The Siemens RS-232/PPI and USB/PPI Multi-Master cables (order number 6ES7 901--3CB30--0XA0 or 6ES7 901--3DB30--0XA0, respectively) provide electrical isolation between the RS-485 port on the S7-200 CPU and the RS-232 or USB port that connects to your computer. If you do not use the Siemens Multi-Master cable, you must provide isolation for the RS-232 port of your computer. Hope this helps, Daniel Chartier |
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