[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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