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Unread 08-12-2014, 18:28
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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!
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Unread 08-12-2014, 18:35
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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
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Unread 08-12-2014, 18:40
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Re: Ordering Materials

That would make sense. However, I do not think my team is choosing to receive the KOP this year. Hmmmmm.
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Unread 08-12-2014, 18:43
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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That sample wiring diagram on the FRC Blog is out of date.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 View Post
Also, are Weidmüller connectors needed for connections to the PCP?
What's a PCP?
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Last edited by Mark McLeod : 08-12-2014 at 18:47.
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Unread 08-12-2014, 18:43
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Re: Ordering Materials

Quote:
Originally Posted by ebrnc View Post
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.
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Unread 08-12-2014, 18:52
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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!
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Unread 09-12-2014, 07:56
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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.
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Unread 09-12-2014, 08:09
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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.
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Unread 09-12-2014, 15:17
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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.
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Unread 09-12-2014, 15:24
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Re: Ordering Materials

Quote:
Originally Posted by Al Skierkiewicz View Post
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.
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Unread 10-12-2014, 08:19
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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.
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Unread 10-12-2014, 12:03
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Re: Ordering Materials

Having not seen the new control system can someone recommend a length for posts on the Weidmuller wire ferrules?
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Unread 10-12-2014, 18:14
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Re: Ordering Materials

Quote:
Originally Posted by mklinker View Post
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.
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Unread 10-12-2014, 18:46
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Re: Ordering Materials

Quote:
Originally Posted by Al Skierkiewicz View Post
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?
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Unread 11-12-2014, 11:44
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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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