[time-nuts] Lucent KS-24361 RS-422 interface pinout
Bob Camp
kb8tq at n1k.org
Tue Dec 2 07:35:06 EST 2014
Hi
Yes that’s a typo
> On Dec 1, 2014, at 9:10 PM, Bob Camp <kb8tq at n1k.org> wrote:
>
> Hi
>
> If you dig back a month or so, there is a post with all the pinouts on all the connectors.
>
> 4 RX+
> 8 RX-
>
> 5 TX+
> 6 TX-
should be pin 9 for TX-
Sorry about that.
Bob
>
> 3 and 7 ground
>
> It’s serial so TX on one goes to RX on the other. + goes to + and - to -. The pins are numbered on the connector in *very* small print.
>
> Bob
>
>
>
>> On Dec 1, 2014, at 8:59 PM, Graham <planophore at aei.ca> wrote:
>>
>> I got my pair of REF-0 and REF-1 to lock, REF-1 is now in STBY and the REF-0 is on. Thanks to Bob suggesting I wiggle and/or re seat the interface cable.
>>
>> However, I have not been able to "peek" inside using the DIAG port. Rather than try the hack suggested by Stu I bought a USB to RS-422 interface cable, a Startech ICUSB422. It has a DB-9P which plugs directly into the DIAG connector BUT on comparing it's pinout to the "hack cable" suggested by Stu, it seems that they really don't line up correctly.
>>
>> This is Stu's suggested "hack cable" from his very informative earlier post
>>
>> RFTG PC
>>
>> DE-9P DE-9S
>>
>> 7 <---GND---> 5
>> 8 <--------- 3 TXD
>> 9 ---------> 2 RXD
>>
>> The ICUSB422 pinout is as follows (arrows point in direction of data flow)
>>
>> ICUSB J8 - Diagnostic
>> 1 TXD- --------> 8 (based on Stu's diagram and description)
>> 2 TXD+ --------> ??
>> 3 RXD+ <-------- ??
>> 4 RXD- <-------- 9 (based on Stu's diagram and description)
>> 5 GND --------- 7 (based on Stu's diagram and description)
>> 6 NC
>> 7 NC
>> 8 NC
>> 9 NC
>>
>> But what pins to TXD+ and RXD+ connect to? After much searching and looking at a bewildering number of variations of pinouts, I am still confused on where these two go. A Wild Ass Guess (WAG) is that 2 TXD+ --> 4 and 4 RXD- <-- 5 but I am really uncertain and that is just based on one of the pinouts I found in my searchs.
>>
>> I thought I would be lucky and would just be able to plug and play with the ICUSB422 directly to the J8 Diagnostic port but it isn't so; I will need to make up an additional adapter to get the right pins going to the right pins.
>>
>> I am hoping someone on the list knows for certain. Failing that I will have to poke at it with a scope or DVM tomorrow and to see if I can make sense of it.
>>
>> cheers, Graham ve3gtc
>>
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