DMX terminators

[Techie_v2]

I know its best practice to use a terminator in your last fixture in a dmx line but if that fixture has both 3 and 5 pin sockets, should you put on in each?

 

Thanks

[kgallen]

No, just one.

Otherwise you will double-terminate - the two 120 ohm resistors will be in parallel resulting in a 60 ohm termination which is the incorrect termination for a 120 ohm transmission line.

[Techie_v2]

But if using a splitter, put one on the last fixture on each split correct?

[Davidmk]

1 hour ago, Techie_v2 said:

But if using a splitter, put one on the last fixture on each split correct?

Yes. (Nice short answer 😀)

[van den abbeele Eric]

Hello,

I systematically use splitters (2-way, 4, 6 and 8-way) generally having around 70 LEDs (Moving & Static projectors) plus traditional lighting.

This on a relatively large stage for "Moselle" department.

Stage of 15m X 9m, dance floor (with in fact backstage included 26m X 10m)

So it has long DMX lengths. The grill being between 6 to 7m high.

 

So to limit the worries of lengths in DMX, I have to use some DMX Splitters (4, 6 and 8 DMX outputs) and indeed I do not put a cap on each free output of the splits with only DMX 3 as with those that have DMX 3 and DMX 5 outputs.

normaly all is working good.

 

thank

-----------------------------------------------------------

 

Bonjour,

 

J'utilise systématiquement des splitter (2 voies, 4, 6 et 8 voies) ayant en general en alentour de 70 Leds (projecteurs Moving & Statique) avec en plus tout ce qui est éclairage traditionnel. Cela sur une scène relativement grande pour le département de la Moselle. Scène de 15m X 9m, tapis de danse (avec en fait coulisses comprises 26m X 10m)

Donc il a de grandes longueur DMX. Le gril étant entre 6 à 7m de haut.

Donc pour limiter les soucis de longueurs en  DMX, je suis obligé d'utiliser un certain de Splitters DMX (4, 6 et 8 sorties DMX) et en effet je ne mets pas de bouchon sur chaque sortie libre des splits avec uniquement le DMX 3 comme avec ceux qui ont des sorties DMX 3 et DMX 5. 

 

Normalement tout va bien ainsi.

 

Une bonne fin de journée

 

Eric

 

 

[Edward Z88]

Hi All,

To confirm, there is no need to terminate "unused" outputs of a DMX splitter. You only need to terminate the DMX line if there are "receivers" on the DMX line.

Edward