XTBA SMART SWITCH Manual Page 2of 3
Product #07201 - Issue C 11/07/2011
© XTBA 1986 – 2012
The XTBA Smart Switch 2:1 is designed to give priority to two streams of DMX
data allowing two DMX streams to be on line and switched over in the event of
data failure on DMX1 or by the use of DMX channel 510. Before the unit switches
over the Smart Switch calculates the start of the next DMX packet to provide a
‘glitch’ free change over.
The Smart Switch can be used as an on line back up or simple routing system.
OPERATION
On power up the Smart Switch will sequence the LED’s on the front panel. This
tests the LED’s and the micro controller. The Smart Switch has two modes of
operation dependant on the internal switch setting. (Factory setting is Mode 1).
In Mode 1 the front panel LED’s will sequence left to right. In Mode 2 the LED’s will
sequence right to left.
Mode 1 – Factory setting
DMX data is connected to DMX1, which is the main data stream and DMX2 which
is the ‘back up’. DMX1 monitors the incoming data for Break, Mab and valid words.
In the event of data failure or invalid data on DMX1 the Smart Switch will route the
output to DMX2.
The front panel LED’s display the following DMX1 good, e.g. Break, Mab and data
words OK. DMX2 good e.g. Break and Mab and data words OK. The backup led is
lit when DMX1 has failed due to errors or has been disconnected and the output
control is switched to DMX2 provided this is also valid.
Mode 2
By switching the internal PCB mounted switch (towards the blue crystal) the Smart
Switch can be used as a simple data router. In mode 2 control of the incoming
data, switched to the output is controlled by DMX1 channel 510. If DMX1 channel
510 is set to full DMX1 IN will be routed to the output. If DMX1 channel 510 is less
than full or not connected the output will switch to DMX2. If DMX2 is not connected
or is invalid data the unit will not switch over.
By using mode two the Smart Switch can be used as a on line router to enable a
remote control to take over from the main desk on DMX2 in by simply bringing
channel 510 to full.
In either mode Data on DMX OUT is an exact rebuffered copy of data in, on either
DMX1 or DMX2 as the unit solid state switches the data streams.
POWER SUPPLY
The mains input to the transformer is via a 2A a/s fuse. A spare fuse is provided in
the input connector block.
19” RACK MOUNTING
The XTBA Smart Switch is provided with a pair of ‘ears’ for fitting into a 19” rack
frame. The ears are fitted to the unit by removing the two screws on either side at
