K2 USB to 9 Pin Cable (info)
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K2 USB to 9 Pin Cable (info)
 
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I'm passing this info along for those who may have a K2 and find this useful.
FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0 The cable has a USB plug on one end and is terminated in wires on the other end. -- Here is the Pin-out to make a USB to K2 Cable Color - Signal - Notes Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2 Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2 Black - Gnd - Pin 5 on 9 Pin Connector - Ground Green - RTS - Tied to CTS Line Brown - CTS - Tied to RTC Line Red - Power - Unused - 0.0v -- ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Harry,
Before plugging that into the K2 AUX IO connector, the Green, Brown, and Red conductors must be cut or damage to the K2 and/or the adapter can be damaged. Note that the connector on the K2 is labeled AUX IO, and that is for a reason - it is NOT RS-232. At the very least, if that adapter ties RTS and CTS together, that will put +12 volts on the VRFDET internal K2 signal line and the K2 will not transmit with that condition present, and it may damage the MCU pin 2 input. If that pin is damaged, the K2 will transmit but will have no power control and the power will go to the maximum which will cause additional damage if that condition exists for more than a very short time. Build the PC to K2 cable shown in the KIO2 and KPA100 manuals and plug it into that adapter or most any other FTDI USB to Serial adpater. 73, Don W3FPR On 6/4/2019 2:10 PM, Harry Yingst via Elecraft wrote: > I'm passing this info along for those who may have a K2 and find this useful. > > FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0 > The cable has a USB plug on one end and is terminated in wires on the other end. > -- > Here is the Pin-out to make a USB to K2 Cable > > Color - Signal - Notes > Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2 > Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2 > Black - Gnd - Pin 5 on 9 Pin Connector - Ground > Green - RTS - Tied to CTS Line > Brown - CTS - Tied to RTC Line > Red - Power - Unused - 0.0v > -- Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: K2 USB to 9 Pin Cable (info)
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Please read what I posted and you will see it is correct
The color codes are from the USB-RS232-WE-1800-BT-0.0 On Tuesday, June 4, 2019, 2:42:53 PM EDT, Don Wilhelm <[hidden email]> wrote: Harry, Before plugging that into the K2 AUX IO connector, the Green, Brown, and Red conductors must be cut or damage to the K2 and/or the adapter can be damaged. Note that the connector on the K2 is labeled AUX IO, and that is for a reason - it is NOT RS-232. At the very least, if that adapter ties RTS and CTS together, that will put +12 volts on the VRFDET internal K2 signal line and the K2 will not transmit with that condition present, and it may damage the MCU pin 2 input. If that pin is damaged, the K2 will transmit but will have no power control and the power will go to the maximum which will cause additional damage if that condition exists for more than a very short time. Build the PC to K2 cable shown in the KIO2 and KPA100 manuals and plug it into that adapter or most any other FTDI USB to Serial adpater. 73, Don W3FPR On 6/4/2019 2:10 PM, Harry Yingst via Elecraft wrote: > I'm passing this info along for those who may have a K2 and find this useful. > > FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0 > The cable has a USB plug on one end and is terminated in wires on the other end. > -- > Here is the Pin-out to make a USB to K2 Cable > > Color - Signal - Notes > Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2 > Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2 > Black - Gnd - Pin 5 on 9 Pin Connector - Ground > Green - RTS - Tied to CTS Line > Brown - CTS - Tied to RTC Line > Red - Power - Unused - 0.0v > -- ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: K2 USB to 9 Pin Cable (info)
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In reply to this post by Elecraft mailing list
To Clarify this information
- The color codes are from the wires on the FTDI USB Cable (USB-RS232-WE-1800-BT-0.0) - The only wires that will be connected are the Yellow Wire that will be connected to Pin 2 of the Male 9 pin connector Orange Wite that will be connected to Pin 3 of the Male 9 pin connector Black Wire that will be connected to Pin 5 of the Male 9 pin connector - The Green Wire on the USB cable is the RTS Line The Brown Wire on the USB cable is the CTS line The Green and Brown Wires should be connected to each other and nothing else.- The Red wire is unused - This should clear up any confusion I'm passing this info along for those who may have a K2 and find this useful. FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0 The cable has a USB plug on one end and is terminated in wires on the other end. -- Here is the Pin-out to make a USB to K2 Cable Color - Signal - Notes Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2 Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2 Black - Gnd - Pin 5 on 9 Pin Connector - Ground Green - RTS - Tied to CTS Line Brown - CTS - Tied to RTC Line Red - Power - Unused - 0.0v -- ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Elecraft mailing list
"Before plugging that into the K2 AUX IO connector, the Green, Brown, and Red conductors must be cut or damage to the K2 and/or the adapter can be damaged."
It appears to me that the only AUX connector pins that are used by this proposed cable are 2, 3, and 5. If the K2 will accept RS-232 levels without damage then I don't see how any damage can be done by the proposed cable. The cable specification would be clearer if the meaning of "RTC" were known. I suspect it's a typo for RTS and that the CTS and RTS wires are tied together but not connected to the AUX connector. 73, Andy, k3wyc ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: K2 USB to 9 Pin Cable (info)
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Yes it was a typo it should have been RTS
The RTS (Request To Send) and CTS (Clear To Send) probably don't need to be tied together but some programs may want it so I tied them together. On Tuesday, June 4, 2019, 3:30:20 PM EDT, Andy Durbin <[hidden email]> wrote: "Before plugging that into the K2 AUX IO connector, the Green, Brown, and Red conductors must be cut or damage to the K2 and/or the adapter can be damaged." It appears to me that the only AUX connector pins that are used by this proposed cable are 2, 3, and 5. If the K2 will accept RS-232 levels without damage then I don't see how any damage can be done by the proposed cable. The cable specification would be clearer if the meaning of "RTC" were known. I suspect it's a typo for RTS and that the CTS and RTS wires are tied together but not connected to the AUX connector. 73, Andy, k3wyc ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Elecraft mailing list
Harry and all,
Yes, that clarifies things. Pins 7 and 8 of the DE9 connector at the K2 end of the cable must NOT connect to the K2 AUX IO connector. But the wires coming from the cable (NOT from the D-sub connector), can be connected together. Applications that expect CTS/RTS handshaking will need that connection - most applications will work without it. 73, Don W3FPR On 6/4/2019 3:26 PM, Harry Yingst via Elecraft wrote: > To Clarify this information > - > The color codes are from the wires on the FTDI USB Cable (USB-RS232-WE-1800-BT-0.0) > - > The only wires that will be connected are the > Yellow Wire that will be connected to Pin 2 of the Male 9 pin connector > Orange Wite that will be connected to Pin 3 of the Male 9 pin connector > Black Wire that will be connected to Pin 5 of the Male 9 pin connector > - > The Green Wire on the USB cable is the RTS Line > The Brown Wire on the USB cable is the CTS line > The Green and Brown Wires should be connected to each other and nothing else.- > The Red wire is unused > - > This should clear up any confusion > > > I'm passing this info along for those who may have a K2 and find this useful. > > FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0 > The cable has a USB plug on one end and is terminated in wires on the other end. > -- > Here is the Pin-out to make a USB to K2 Cable > > Color - Signal - Notes > Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2 > Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2 > Black - Gnd - Pin 5 on 9 Pin Connector - Ground > Green - RTS - Tied to CTS Line > Brown - CTS - Tied to RTC Line > Red - Power - Unused - 0.0v > -- > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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