XTBA SMART MERGE 2 Manual Page 2of 3
Product #02602 - 11/07/11
© XTBA 1986 – 2012
The XTBA Smart Merge 2 will multiplex two DMX512 input signals to two
DMX512outputs. Each dimmer channel from the two input signals is compared and
the higher channel level will be outputted. The second DMX inputs start address
may be altered by setting the offset address on the three front panel code
switches.
The two DMX512 signals to be merged are connected to inputs one and two. The
outputs are connected to DMX512 out 1 and 2, and to the equipment to be
controlled. Input one effectively will pass the DMX data straight through the unit.
Input two allows for the second input start address to be moved relative to input
one.
When power is applied to the unit the green SYSTEM OK LED will flash. When
valid DMX512 data is being received on input one or two the inputs yellow LED will
light. If the data is not DMX512, invalid data or intermittent, the yellow LED will
flash.
By use if the three code switches on the front panel it is possible to move the start
address of input two. This will prove to be most useful when two control systems
need to be joined together e.g. a lighting control and a moving light control. If the
lighting control for example has 250 channels, by setting the address on the front
panel to 251 channel one/input two will appear at 251 on the merged DMX output.
Any overlapping channels will be treated as highest takes precedent e.g. the
highest value will be outputted. Offset channels over the 512 output 1 limit (e.g.
512) will be outputted to DMX OUT 2.
OFFSET CALCULATION
If the Smart Merge2 is being used for channel shifting the offset can be calculated
by subtracting the offset number from 512 and adding 2 to the result. e.g. if the
offset switches are set for 413, then 512 minus 412 = 99, add two = 101. Therefor
channel one on DMX OUT 2 will be controlled from channel 101 on DMX IN 2.
or
To get the required offset setting to output a channel onto DMXOUT 2, take the
channel number required and subtract from 512 and then add 2. e.g. We need
channel 101 on DMXIN 2 to appear as channel one on DMXOUT 2. 512 minus 101
= 411 plus 2 = 413. So the offset address should be set for 413.
OFFSET ERROR
The Offset Error led will flash if channels are potentially being lost from the system
e.g. if the off set switches are set above 513. Thus if input two has 512 channels
and the offset is more than 513 channels will be lost.
POWER SUPPLY
The mains input to the transformer is via a 2A a/s fuse and the transformer may be
switched to 120 volt operation via on board switch. A spare fuse is provided in the
input connector block on the rack unit.
