Ideal RJ-45 Connectors ?

[hbiss]

These have been short cables, like 1 or 2 feet. Did a google search and am getting different answers about minimum length. Could that be the problem.?

No, other than my particular tester has a problem doing a "transmission" test with short cables. Continuity and wire mapping works fine.

-Hal

 

[Todd0x1]

Had another ethernet cable with Ideal connectors fail yesterday when connected between a Beijer HMI and an ABB XIO-04 controller. Like before, it tested fine with a Scout 2 tester. Just got a bag of Ampcon amcat6250100. We'll see if they do better.

These have been short cables, like 1 or 2 feet. Did a google search and am getting different answers about minimum length. Could that be the problem.?

whats the p/n of these ideal connectors you have?

 

[TwoBlocked]

No, other than my particular tester has a problem doing a "transmission" test with short cables. Continuity and wire mapping works fine.

-Hal

Hmmm, if you get a transmission problem when testing short cables, then that might be the problem. I should be able to mess with it next week.

 

[gadfly56]

Correct. Telco wiring is NOT twisted-pair. The first four colors were the standard, at least for residential wiring.

Somewhere along the way, I heard "red-green" called the "Christmas pair", and "yellow-black" the "Halloween pair" to keep straight which colors went together.

 

[hbiss]

Hmmm, if you get a transmission problem when testing short cables, then that might be the problem. I should be able to mess with it next week.

No... it an anomaly with the tester I have. It just won't test short cables for crosstalk. Even factory made patch cords. Nothing to do with your problem.

-Hal

 

[TwoBlocked]

No... it an anomaly with the tester I have. It just won't test short cables for crosstalk. Even factory made patch cords. Nothing to do with your problem.

-Hal

Unless ABB has a problem with short cables. Easy enough to try.

 

[hbiss]

Unless ABB has a problem with short cables. Easy enough to try.

You would have found that out already when you tried a pre-made patch cable.

I think you are grasping at straws here...

-Hal

 

[TwoBlocked]

You would have found that out already when you tried a pre-made patch cable.

I think you are grasping at straws here...

-Hal

Well, the last problem was solved with a longer, pre-made patch cable. I suppose I can make a couple cables the same length as a premade one, but with different end connectors and see how it goes.

If I remember right with some shop equipment, it wasn't working with premade cables either. And then another day it was.

ABB had a problem with one product line of XIOs (I HATE that name. Makes me think of "eXamine If Open"). They had to put a ferrite core around some of the wiring inside.

I am not a fan of their TotalFlow products.

 

[hbiss]

The transmission test just looks for split pairs. The continuity test has no way to tell if you got the pairs right or you used a blue/w and an OR/w for a pair. It only looks to see if pin 1 is connected to pin 1, pin 2 is connected to pin 2, etc. No way to tell what colors the conductors are. I believe the transmission test puts a tone on the white/blue (for instance) and looks for the highest level on the blue/white. If the tone is highest on some other conductor it indicates a split pair. I suspect that short lengths of cable cause the tone to bleed over to other conductors causing an error.

-Hal