NEXERA Control format

[church]

can anyone confirm that the input control signal to the Wybron Nexera fixtures and the output control signal from the Wybron PS1500 power supplies are DMX512 protocol with +24Vdc added to Pin 4 of the connector. The reason I ask is that I have been told

 

a) that the Wybron PS1500 PSU produces use a "slowed down"version of DMX to control the Nexera, and

 

b) that the Wybron PS1500 PSU provides a standard DMX 512 control signal to control the Nexera.

 

I have received this contradictory info from two sources inside Wybron and two sources external to Wybron.

 

I need to repair two Nexeras I was recently given and I do not have a PSU. I can easily power up the Nexeras from a lab PSU and send DMX to the Nexera but I want to confirm what it needs to receive before I waste time chasing faults that may not exist.

 

Any help appreciated

[martinw]

Be careful here regarding the pinout of the cable - old Wybron scrollers used a different pinout from the Rainbow/ChromaQ standard, and I think pin 1 was 24V and pin 4 was GND. The data sent down the cable was not DMX, but some proprietary protocol, and the PSU box did the conversion.

 

I don't know if Nexera uses the same system.

 

Regards

 

Martin

[church]

Be careful here regarding the pinout of the cable - old Wybron scrollers used a different pinout from the Rainbow/ChromaQ standard, and I think pin 1 was 24V and pin 4 was GND. The data sent down the cable was not DMX, but some proprietary protocol, and the PSU box did the conversion.

 

I don't know if Nexera uses the same system.

 

Regards

 

Martin

 

Hi Martin

 

I think I finally got to the bottom of this and it is a pain in the neck. I got this information from Wybron.

 

On the older Nexeras manufactured with circuit board P/N 256-02-01 Rev B the unit is designed to operate with the Coloram II PSU P/N 19000 or 19060 or 19012 and they use as you say +24V is Pin 1 and Pin 4 is 0V.

 

There are some types of Nexera which have "LX" on the Nexera sticker that use circuit board P/N 290-02-003RC which are designed to operate with PSU Part # 10150 or 20300 or 20600 which have pin 4 as +24V and Pin 1 as 0V.

 

Note the newer PSU just transmits the DMX via an opto isolator to the Nexera. You are correct on the ColoRam II PSU the DMX is garbled into a proprietary protocol

 

thank you for your help