RL01, RL02, RK06, RK07 cable differences

Jay Jaeger cube1 at charter.net
Fri Sep 25 16:08:30 CDT 2015

On 9/25/2015 1:00 PM, Paul Anderson wrote:
> Thanks for the feedback everyone.
> The 17 class # should be the type of wire used in the cable, so maybe the
> -00 ans -01 is the difference .

That would surprise me.  That last two digit suffix is typically a revision.

> I'm just trying to sure weather or not the RL and RK cables are
> interchangeable. Sounds like the RK might work on the RL, but not the other
> way.

I think that has been my experience.  I know that the RL cables do not
work with the RK drives, because I tried it once.

> I have plastic and metal terminators, and the same with the cables and was
> trying to remember if that had anything to do with it.

I have only ever seen plastic ones, and I have both kind of drives.  So,
no, I don't think so.

> Seems like we used to use the BC80 M and J for any controller when we had
> them.
> For whatever reason DEC replaced the 70-12122  with the BC21Z.
> Is the 70-12145 the electrical connector for the transition bracket, the
> metal mounting bracket, or the entire assembly?

>From the RL01/02 user guide it appears that part number is for the
assembly. I ran out of time before I could check the controller documents.

> Thanks, Paul
> On Fri, Sep 25, 2015 at 10:07 AM, Jay Jaeger <cube1 at charter.net> wrote:
>> On 9/25/2015 7:24 AM, tony duell wrote:
>>>> Does anyone have both of these that I can pick their brains?
>>> Yes.
>>> The RK06/07 cable connects all pins. The RL01/02 one connects only those
>> used
>>> by the RL drives. I doubt the characteristic impedance is different as
>> the terminators
>>> are the same.
>>> -tony
>> Actually, the terminators for the RL and RK06/07 drives are *identical*,
>> part number 70-12293-xx (The RL manual has no XX, the RK06/7 manual as
>> 0-0 for XX, but no worries, that is just a revision number) .
>> Darn good thing, too, because the terminators have no markings on them.  ;)
>> The wire in my RK06/RK07 cables has part number 1700051-00 on it. (Not a
>> reliable indicator - see below).  According to the manual, the RK06/RK07
>> cable assembly part numbers are 70-12292-LL where LL (length) may be 8,
>> 12, 25 or 40.  All of my RK06/RK07 cables have the part number.
>> The wire in my RL cables is marked two different ways.  One cable has
>> the DEC part number for the cable itself (70-12122-10), and the wire is
>> part number 1700051-01 (same as the RK cable!), and is marked AWM ...
>> 2464.  Others, which have no DEC part number on either the cable or the
>> wire, has AWM ... JUDD Wire Div. Style 2576 on the wire.
>> The wire I have on my RK06/07 cables is smooth and stiff, whereas the
>> wire in the RL cables tends to be more "bumpy" and more flexible and
>> shinier.  However, given the wire part number 1700051-xx appears on both
>> kinds, and is not shiny, wire used is itself not a reliable indicator.
>> The DEC part numbers for the RL cables themselves apparently varies:
>> BC20J-XX DEC part number 70-12122-10 - RL11, RLV11
>> BC80J-20 - RL8A
>> BC80M-6 - RLV12
>> I would say that if an unmarked cable is 6, 10 or 20 feet long, and
>> flexible it is mostly like an RL cable.   If the cable is 8, 12, 25, or
>> 40 feet long it is probably an RK06/07 cable.
>> JRJ

More information about the cctech mailing list