Sensor CEM DMX Port-A & Port-B Pass-Thru

I believe that PORT B can be used as an output on a CEM+/CEM3 not a CEM.

To do what I believe you need, disable termination on the last rack and daisy chain into your first external dimmer, then your next, etc. Terminate on your last.

If your external dimmers are non permeant then I suggest you make a terminator in an XLR (120ohm resistor across pins 2 and 3) and put that on the DMX cable when the external dimmers are not present.

There's no Port-B output on CEM3.  It's only on CEM+.

Sorry, should have been more clear, the system I have is a CEM+ and is only 1 rack. What I have is Port A cabled to back-of-house (where I run from) and Port B cabled to back-stage (where I want to put the external dimmers). And there is about 125 feet between the two locations, which is why I want to use B to run the external dimmers.

Sorry, should have been more clear, the system I have is a CEM+ and is only 1 rack. What I have is Port A cabled to back-of-house (where I run from) and Port B cabled to back-stage (where I want to put the external dimmers). And there is about 125 feet between the two locations, which is why I want to use B to run the external dimmers.

Hi Jack,

why not just use the THRU DMX in the Sensor+ Rack?

It passes through the incoming DMX to external devices.

I was just re-reading the Sensor+ CEM+ Configuration Manual and came across a diagram under the section on CEM+ Playback Priorities (pg 6). On the top it shows DMX-A Input & DMX-B Input and on the bottom shows Port B DMX Output. So I think the answer to my question is Yes, it is Pass-Thru. Can someone confirm this for me ?

Thanks

Corey

 That was what I was trying to figure out. If I connect to A as input to the CEM+ can I use B as an output ?

Wait, what DMX Thru in the rack ? Is it someplace other than the CEM+ ?

Hi Jack,

in the Rack, you have a DMX A Input, DMX B Input, and DMX THRU for both.

DMX B Input can be modified to an Output.  

I think its best to contact the dealer who installed this rack and have them assist you

with this modification.

Hey, a small Gotcha is that if you have Smart controls in the system, the DMX B will not contain any of the Smart data.  Smart will talk into the rack, but not out of it.