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ebrnc 08-12-2014 18:28

Ordering Materials
 
Quick question: how is the wireless bridge hooked up to the new RoboRIO? What kind of cable do we need? Also, are Weidmüller connectors needed for connections to the PCP? I heard this somewhere, but I am not sure if it is true or not. Thanks!

TimTheGreat 08-12-2014 18:35

Re: Ordering Materials
 
Based on the image of the new control system the wireless bridge will be connected via USB. I imagine that the cable will be provided in the KOP

ebrnc 08-12-2014 18:40

Re: Ordering Materials
 
That would make sense. However, I do not think my team is choosing to receive the KOP this year. Hmmmmm.

Mark McLeod 08-12-2014 18:43

Re: Ordering Materials
 
The DLink, Rev B will be connected via the roboRIO Ethernet port.
Pretty much the same way it got connected on the older control system.
So you just need an Ethernet cable.
Power will come via the Voltage Regulator Module "5v/2a" Weidmüller connections.

That sample wiring diagram on the FRC Blog is out of date.

Quote:

Originally Posted by ebrnc (Post 1412282)
Also, are Weidmüller connectors needed for connections to the PCP?

What's a PCP?

RamZ 08-12-2014 18:43

Re: Ordering Materials
 
Quote:

Originally Posted by ebrnc (Post 1412284)
That would make sense. However, I do not think my team is choosing to receive the KOP this year. Hmmmmm.

I think you're mistaken, as the Kit of Parts is a tote with various parts that is given to every team every year at kickoff. Your team may have opted out of the KOP Drive Base, but that's a totally different thing.

ebrnc 08-12-2014 18:52

Re: Ordering Materials
 
Awesome. Thank you! Haha whoopsies... Typo: PDP. And that makes more sense about the KOP:) I was unsure of what was included in the portion given to all teams!

adciv 09-12-2014 07:56

Re: Ordering Materials
 
The PDP has two different connections on it. For the traditional 40/30/20 Amp breakers, it uses the same connectors as we have previously.

For the Rio, and your first VRM & PCM, you use the Weidmüller connectors. The Weidmüller take bare copper and do not require anything to be crimped to it. That said, I recommend tinning the wires to prevent them from getting "mashed" after repeated insertions/removals.

Al Skierkiewicz 09-12-2014 08:09

Re: Ordering Materials
 
EB,
The Weidmuller connectors are designed for wire or ferrule termination. It is not mandatory for the ferrules but they might make termination easier in a tight robot. Get very good at twisting the wire and inserting it on the first try. I suggest teams practice outside of the robot. 'No whiskers' should be your watchwords.

JCharlton 09-12-2014 15:17

Re: Ordering Materials
 
I'd never used ferrules before, but after trouble inserting wires into the new PCM (particularly for the larger compressor wires) I ordered a kit from ferrulesdirect.com. Well worth it, much easier to work with and I'd guess more reliable too. If your team can afford it I'd recommend purchasing a crimping tool and ferrules.

AdamHeard 09-12-2014 15:24

Re: Ordering Materials
 
Quote:

Originally Posted by Al Skierkiewicz (Post 1412432)
EB,
The Weidmuller connectors are designed for wire or ferrule termination. It is not mandatory for the ferrules but they might make termination easier in a tight robot. Get very good at twisting the wire and inserting it on the first try. I suggest teams practice outside of the robot. 'No whiskers' should be your watchwords.

Which ferrules would you recommend.

Al Skierkiewicz 10-12-2014 08:19

Re: Ordering Materials
 
Adam,
I don't have the Weidmuller part number but I wouldn't use anything else. Get the right crimper as well.

mklinker 10-12-2014 12:03

Re: Ordering Materials
 
Having not seen the new control system can someone recommend a length for posts on the Weidmuller wire ferrules?

JCharlton 10-12-2014 18:14

Re: Ordering Materials
 
Quote:

Originally Posted by mklinker (Post 1412764)
Having not seen the new control system can someone recommend a length for posts on the Weidmuller wire ferrules?

The recommended strip length is 8mm. This is quite long for strands, easy to get them bunched up.

Ferrules avoid all this. Another benefit is that with plastic collar ferrules it's easy to verify visually that all the wires have been inserted to the correct depth.

AllenGregoryIV 10-12-2014 18:46

Re: Ordering Materials
 
Quote:

Originally Posted by Al Skierkiewicz (Post 1412659)
Adam,
I don't have the Weidmuller part number but I wouldn't use anything else. Get the right crimper as well.

Here's the relevant information from this spec sheet. I believe that is the series connector the new control system uses.

Quote:

With wire end ferrule, acc. to DIN 46 228/1, min. 0.25 mm²
With wire end ferrule, acc. to DIN 46 228/1, max. 1.5 mm²
w. plastic collar ferrule, DIN 46228 pt 4, min. 0.25 mm²
w. plastic collar ferrule, DIN 46228 pt 4, max. 0.75 mm²
I haven't used these connectors yet so I could be reading this wrong. From what I see it looks like many manufacturers make ferrules that meet those specs. Does that all look right Al?

ChuckDickerson 11-12-2014 11:44

Re: Ordering Materials
 
Al,

Given we all get $30 to spend at Inventables what are your thoughts on these ferrules and associated crimper for use with the new control system Weidmuller connectors?


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