8
DMX Start Address
To place the fixture in DMX mode, DIP Switch #10 is set ON. Next, set the start
address using the other DIP Switches located on the back of the fixture. Each
switch has an associated value. Adding the value of each switch in the ON
position gives the start address. Determining which switches to toggle ON given
a specific start address is accomplished by subtracting the largest switch value
possible from the selected start address which does not cause a negative
number. Continue this process until zero is reached, always subtracting the
largest possible value that does not cause a negative.
Example1:
DIP Switch settings for the address of 90:
Listed with each
switch is its associated binary value. The first switch has a value of 1 and each following switch
doubles in value. Do not confuse the switch with its value. Start by subtracting the largest switch
value possible that doesn’t cause a negative result: 90–
64
=26.
Continue by subtracting the next largest switch value possible
until zero is reached: 26–
16
=10, 10–
8
=2, 2–
2
=0. Set the
switches corresponding to the values 64, 16, 8 and 2 to the ON
position: switch # 7, switch # 5, switch # 4 and switch # 2
– plus
the DMX switch #10.
Addressing multiple fixtures of the same type is accomplished by
simply adding the number of channels required to the start address of the first fixture to yield the
start address of the next fixture. Although this fixture can be used in modes that occupy less than
12 channels, it is highly recommended that the units are still addressed 12 channels apart. This
reduces the chances of data overlapping if the console or control is to become temporarily mis-
configured or unstable.
Example2
Select Start Addresses for 4 fixtures each requiring 12 channels of DMX.
For this example, start with the first unit set to the first possible Start Address =
1
. This fixture
occupies DMX channels 1 thru 12. The next DMX channel available for a Start Address is found by
adding the previous fixture’s Start Address to its channel requirement: 1+12=
13
. To maximize
channel usage, we will leave no empty channels between fixtures so the second Start Address is set
to DMX channel 13 and that fixture occupies channels 13 thru 24. The third fixture will be
addressed 13+12=
25
and occupy channels 25 thru 36. The last fixture is addressed 25+12=
37
and
will occupy channels 37 thru 48. Thus, 4 fixtures using 12 channels each have Start Addresses of
1, 13, 25
and
37
and the next free channel in the system is 37+12=49.
DIP Switch Values
Switch
Value
1
1
2
2
3
4
4
8
5
16
6
32
7
64
8
128
9
256
10
DMX
Function
5 Pin
XLR (Plug)
Pin 1: GND(Sheild)
Pin 2: Signal(-)
Pin 3: )
Pin 4: N/C
Pin 5: N/C
3 XLR (S
)
Pin 1: GND(Sheild)
Pin 2: Signal(-)
Pin 3: )
Pin ocket
5 Pin XLR (Socket)
Pin 1: GND(Sheild)
Pin 2: Signal(-)
Pin 3: )
Pin 4: N/C
Pin 5: N/C
3 XLR (Plug)
Pin 1: GND(Sheild)
Pin 2: Signal(-)
Pin 3: )
Pin
