[Elecraft] K2 USB to 9 Pin Cable (info)

[Don Wilhelm]

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
> --
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