Doug Fleenor Design DMXOPTO-5 - Manual (Page 7)

6
Sometimes it is necessary for a control run to be split before
reaching the first dimmer. The resulting "wye" connection is a
reflection nightmare. Now you have reflections coming from two
directions, and you can't even terminate both ends of the wye
without overloading the console!
+------+
+----------|DIMMER|
| +------+
+-------+ |
|CONSOLE|-----------------+
+-------+ |
| +------+
+----------|DIMMER|
+------+
Editors Note: The proper item to use in this situation is an
isolated splitter. Doug Fleenor Design now makes splitters with
three, five, and eleven outputs. These diagrams have been left
in the manual for "emergency" use when no splitters are on hand.
Presenting the ONE isolator solution: +------+
+----------|DIMMER|
| +------+
+-------+ +--------+ |
|CONSOLE|----------------|ISOLATOR|-+
+-------+ +--------+ | +------+
+----------|DIMMER|
+------+
and the TWO isolator solution:
+--------+ +------+
/|ISOLATOR|------------|DIMMER|
+-------+ |+--------+ +------+
|CONSOLE|---------------+
+-------+ |+--------+ +------+
\|ISOLATOR|------------|DIMMER|
+--------+ +------+