[time-nuts] KS-24361 Lady Heather problem

Jerry Hancock jerry at hanler.com
Mon Jun 18 11:19:15 EDT 2018


I had the same issue until I switched to a real RS422 converter instead of just using the rs232 types and hoping for luck.  Also, as there are both positive and negative terminals on emit and receive, I think switching from one to the other kept it from hanging.  But by then I had ordered the cheap RS422 converters and installed them anyway.

If you want the parts I used:

https://www.ebay.com/itm/USB-to-RS485-RS422-Serial-Converter-Adapter-Cable-w-FTDI-Chip-FOR-Windows-10-7/192401198462?hash=item2ccc014d7e:g:hdsAAOSwCMFaC7H9 <https://www.ebay.com/itm/USB-to-RS485-RS422-Serial-Converter-Adapter-Cable-w-FTDI-Chip-FOR-Windows-10-7/192401198462?hash=item2ccc014d7e:g:hdsAAOSwCMFaC7H9>


Regards,

Jerry


> On Jun 16, 2018, at 8:58 AM, ew via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Thank you, will see what we can do
>  
> In a message dated 6/16/2018 10:41:26 AM Eastern Standard Time, artgodwin at gmail.com writes:
> 
>  
> I was running two for a while, then needed the FTDI converters for
> something else. I've just reinstated one with a CH340 converter, will see
> if it has any problems.
> I'm currently connected to a ref-0, which is itself connected to another
> ref-0 modified so it functions as a ref-1.
> 
> I've used various RS422 converters : abusing RS232 is probably the worst
> option. There are alleged RS232 converters available on ebay which turn out
> to be TTL and are therefore closer to the right voltage specs than the
> product they clone badly :). However, you probably need to bias the RS422
> levels of the KS24361 to make them reliable.
> 
> I've recently found these converters :
> 
> https://www.ebay.co.uk/itm//253141528330 (other sellers also have them).
> 
> I haven't opened the case to find out what drivers are used (the USB chip
> is CH340), but they're extremely cheap and nicely packaged with leds for
> RX/TX and apparently proper RS422 levels. You can chop the mini-din
> connector off, fit a DE-9 and you've got a perfect KS2461 connection. The
> wires are long, flexible and, IMHO, a nice colour :)
> 
> Connections for a male DE-9 plug to fit the KS24361 J8 are :
> 
> 3 shield
> 4 brown
> 5 orange
> 8 black
> 9 red
> 
> 
> Many converters are sold with DE-9 connectors but there seems to be no
> sensible connection standard so you end up making a conversion lead anyway.
> The smallest, neatest possible converter is FTDI's USB-RS422-WE-1800-BT
> which has the circuitry in the USB plug and wire ends for you to fit a
> DE-9. But they're $36 or so....
> 
> 
> On Sat, Jun 16, 2018 at 2:24 PM, Clint Jay <cjaysharp at gmail.com> wrote:
> 
>> I’ve experienced similar random freezing which turned out to be the
>> Prolific PL2303 USB to serial adapter, changing to a CH340 device fixed it.
>> Might be worth a look?
>> 
>> On Sat, 16 Jun 2018 at 14:11, Mod Mix <modmix at t-online.de> wrote:
>> 
>>> Am 16.06.2018 um 14:00 schrieb ew via time-nuts:
>>>> My partner in crime Juerg has problems running LadyHeather with the
>>> KS-24361. Does any one run it and can help us, may want to doit off
>> list.
>>>> 
>>>> 
>>>> Thank you Bert Kehren
>>> What kind of problem?
>>> Ulli
>>> 
>>> I've some issues from time to time: LH just freezes - not investigated
>>> further, yet.
>>> 
>>> 
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>> 
>> --
>> Clint. M0UAW IO83
>> 
>> *No trees were harmed in the sending of this mail. However, a large number
>> of electrons were greatly inconvenienced.*
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