RL01, RL02, RK06, RK07 cable differences

Paul Anderson useddec at gmail.com
Fri Sep 25 13:00:32 CDT 2015

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 .

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

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.

Seems like we used to use the BC80 M and J for any controller when we had

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?

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.

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