Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Thread Like Summary - SpeakerLink pin layout

Based on various post on this forum this seems to be the pin layout of the SpeakerLink:

RJ45 SpeakerLink Input on DSP
Pin 1-Master Comms
Pin 2-Ground
Pin 3-RS232 Rx
Pin 4-Slave Comms
Pin 5-Ground
Pin 6-RS232 Tx
Pin 7-AES+
Pin 8-AES-

Since pin 1 was never mentioned I assume it is the comm signal. Maybe someone can test and verify this?
There are 3 different signal with each its own ground. Although both 2 and 5 were mentioned for AES, I guess 2 is for the comm.

M6 can power a MS200 but not a MC200. I have used the AES to spdif converters shown above with good success.

Hi

Just three thoughts - although I am by no means an expert at this:

1. Be very careful with the pins on the XLR. It is very easy to get confused. Be sure what side you are viewing from - solder side(rear view in image below) or pin side! Also be sure what sex you are looking at! Hopefully the transformer has numbers on it so that you can follow it through your connector.




2. It will probably work without the AES ground connection as at the AES end, the ground is just for shielding. (In case you want to try it to eliminate something?)


(Note that the above diagram is not from your make of transformer)

3. Pin 7 (AES+) in the speaker may have phantom DC power (with ground). Connecting AES + and AES - to the transformer (AES 110/SPDIF 75 converter) should not be an issue but if you have somehow connected AES+ to ground that may be an issue!

Regards
Peter

I have now seen posts on this on this forum confirming that the M6 will power the MS200.(edited from MC200 - thanks for the correction Bruce!)

My diagram of an impedance matching transformer in my previous post above was a non specific make.

Looking at a Canare (may not be your exact model) in more detail , I have noticed that the ground is connected to the centre tap of the transformer meaning that the phantom power is connected across half of the transformer winding:



The Neutrik one does not have the ground connected to a centre tap on the AES side of the transformer:



I think that I have seen a forum member use one of these Neutrik ones before - I'm not shure which direction or whether there was phantom power.

There are 4 types (with various different sex connectors). I suspect that they can all be used in either direction but the data sheets suggest that 2 have a 75 ohm input - although its not marked as input on the device. (The 3rd one down should be OK)



Peter