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RCM5700 Adding RJ45 Jack

0 votes
The RCM5700 comes without a RJ45 jack mounted on the board. Does Rabbit plan on making a RCM5700 available with the RJ45 jack ?

And if not, what's involved in placing one on the module.
asked Oct 25, 2008 in Rabbit by seulater Community Contributor (52 points)

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26 Answers

0 votes
I've looked at this and determined
that you would need to add many
additional parts after you added
the RJ45 jack.....

These are 603 and 402 size parts...
not for the novice....

best to interface your RCM5700 to
your board design. I did this and bought
the 10-Base-T from the rabbit store
PN 530-0023, had NO luck instead I used
a FIL-MAG PN 23Z467SM part, Mouser Electronics
has these and it worked great..

Keep in mind that if you lay out your
PCB to make sure you have NO Ground or Power Plane
under the Transformer and it's associated parts....

Look at the Rabbit RCM5700 schematic and try to use
the same interface parts to the Transformer
as they did on the schem.
answered Nov 6, 2008 by chuckphd53 New to the Community (18 points)
0 votes
I have been informed by Rabbit that they will have a version of this with the RJ45 and suported parts soon.
answered Nov 6, 2008 by seulater Community Contributor (52 points)
0 votes
For what it's worth, I can't wait to get
the RCM5700 with on-board RJ45.
I have a project that calls just for
this so, let's hope that the RJ45
flavor sees the light of day soon.

I'm ordering the additional components
soon and will retrofit my unit with the jack
from the development board.

Yeah, I know - 0402 packages and
warranty void (but hey, I also have
pillows with no "DO-NOT-REMOVE" labels!)

B.Robert
answered Nov 27, 2008 by VNee New to the Community (1 point)
0 votes
lets just hope they dont jack the cost way up to add a few popcorn components and the jack.
answered Nov 27, 2008 by seulater Community Contributor (52 points)
0 votes
Are there some news about the module RCM5700 with the RJ45 connector on?

I developed a board for the module but I am not able to communicate with the module. In particular it seems that the module receive (if I ping the module I saw the ACT LED blinking) but it is not able to transmit.

Some advise?
answered Jan 19, 2009 by Nicola New to the Community (15 points)
0 votes
Nicola...

you didn't mention how your design was implemented..
I assume you have a ethernet Txfrm as part of your
interface...

can you give some details on the board design..

Chuck
answered Jan 19, 2009 by chuckphd53 New to the Community (18 points)
0 votes
That's right. I'm sorry for the cross-post. Here: http://www.rabbit.com/forums/showthread.php?t=1358 you can find part of my electrical scheme. I use a RJ45 connector with the transformer in.
The connector is for 10/100Mbit Tbase interface.

Thank you for the support.
answered Jan 19, 2009 by Nicola New to the Community (15 points)
0 votes
Nicola...

Could not tell too much form your schem...

BUT....be sure that the RJ45 connector is not placed on
the PCB with GOUND or POWER Planes below it....

this should be just bare PCB to avoid any coupling of noise/signals
and suppression of the signals...

One thing you can try...is to remove the RJ45 connector and place
it on 1/2 inch of wire to stand OFF the PCB .

It will look like a spider sitting tall...but this will remove any coupling
to the pcb and then try your software pinging again...

I have done this with success...on prototypes...

chuck
answered Jan 19, 2009 by chuckphd53 New to the Community (18 points)
0 votes
Chuck,

thank you very much for your advise. On my pcb I have ground plane under the RJ45 connector!! Tomorrow I will try to wire my connector and then I will tell you the result.

Thank you again.

Nicola
answered Jan 19, 2009 by Nicola New to the Community (15 points)
0 votes
I tested my board with the connector placed about 1 cm above the pcb but nothing has chnaged.
The first test consist in placing the RJ45 connector above the pcb (using wrap wire) and without the filter on board. The result is: I saw LINK LED green and ACT LED blinking (the frequency of the blink change if I change the ping frequency).
I placed the filter (i.e. the L, the C and the 2R for TX and for RX) and in this case the ACT and LINK LEDs are off.
answered Jan 20, 2009 by Nicola New to the Community (15 points)
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