mxi-4 pinout

[Transport]

Where can I find pinout for MXI-4?

[JesusG]

Hi, Transport,

here you are the pinout:

Pin 1 on PXI side: Tx+ -> pin 5 on other side.
Pin 6 on PXI side: Tx- -> pin 9 on other side.
Pin 5 on PXI side: Rx+ -> pin 1 on other side.
Pin 9 on PXI side: Rx- -> pin 6 on other side.

The MXI-4 link has a DB9 connector which has only four pins populated.

Saludos!

Jesús

[alexscarbro]

Hola Jesús,

Do you happen to know the impedance of the cable used for MXI-4 connections?

Muchos gracias,

Alex

[Robert__R]

The short answer is 150 ohms.  It was discussed a little here:

https://forums.ni.com/t5/PXI/Custom-cabling-for-MXI-4/td-p/4025802?profile.language=en

[alexscarbro]

Hello Robert,

It looks like the specification is very similar to these Fibre Channel cables made by Amphenol:

https://cablesondemand.com/product/CS-FCDB9X2MM0/URvars/Items/Library/InfoManage/CS-FCDB9X2MM0.htm

Thank you for your help,

Best regards,

Alex

[LabLoko]

Hello Alex and Robert,

Are there any products out there that are a 1-1 replacement for these MX-4 cables ?

I've bought one that looks right but if there's a direct replacement I'll get one of those instead.

These cards seem to be easy to get secondhand but the cables are a rarity.

Cheers

Jamie

[alexscarbro]

Hello Jamie,

I did some research way back when and found that the cable is derived (or equivalent to) a Male to Male 9-way Fibre Channel cable.

The important thing is the cable itself, rather than the connectors. The cable is Madison Cable Corp TurboQuad Gold.

I was able to buy a cable from a company here in the UK:

G. Underwood Ltd

13 Main Street 

Keyworth

Nottingham

NG12 5AA

+44 (0)115 937 6706