Ltech LT-DMX-6803 User manual

LT- DMX-6803 DMX512 Decoder User’s Manual Page 1 of 14
LT-DMX-6803
DMX512 DECODER
User’s Manual
(Please read this manual carefully before use)

LT- DMX-6803 DMX512 Decoder User’s Manual Page 2 of 14
，Forward，
Thanks for choosing our LT-DMX-6803 Decoder. Before installation and
usage, we strongly recommend you to read through this manual carefully.
，After-Sales，
From the day you purchase our products within a year, if being used properly in
accordance with the instruction, and quality problems occur, we provide free
repair or replacement services except the following cases:
1. Any defects caused by wrong operations..
2. Any damages caused by inappropriate power supply or abnormal
voltage.
3. Any damages caused by unauthorized removal, maintenance, modifying
circuit, incorrect connections and replacing chips.
4. Any damages due to transportation, breaking, flooding water after the
purchase.
5. Any damages caused by earthquake, fire, flood, lightning strike etc force
majeure of natural disasters.
6. Any damages caused by negligence, inappropriate storing at high
temperature and humidity environment or near harmful chemicals.
7. Product has been updated.
，Safety warnings ，
1. Please don’t install this controller in lightening, intense magnetic and
high-voltage fields.
2. To reduce the risk of component damage and fire caused by short circuit,
make sure correct connection
3. Always be sure to mount this unit in an area that will allow proper
ventilation to ensure a fitting temperature.
4. Check if the voltage and power adapter suit the controller (please select
DC5-24V power supply with constant voltage)
5. Don’t connect cables with power on, make sure a correct connection and
no short circuit checked with instrument before power on.
6. Please don’t open controller cover and operate if problems occur.
The manual is only suitable for this model, any update is subject to change
without prior notice.

LT- DMX-6803 DMX512 Decoder User’s Manual Page 3 of 14
Product Brief
LT-DMX-6803 DMX512 decoder is dedicated to run LED pixel lights with
chip LPD-6803 ，with the help of DMX decoder’s data conversion, all led
pixel lights with Chip LPD6803, Chip LPD-6803 outputs 3 CC channels, with
built-in grey scale processor, compatible with 32/256 grey scales, the data
cable includes only two cords, convenient for design and installation of LED
lights. Chip 6803 is widely used among LED pixel light, LED dreamy wall,
LED pixel screen, SMD strip, hi-power flood light and led wall washer etc.
Ⅰ. Specifications:
Input voltage
DC5V～DC24V
Input signal
DMX512/1990
Output signal
LPD6803/D705 data protocol
Decoder channel s
360/512 dmx channels
Grey Scale
256 levels
DMX512 socket:
Standard ×LR-3 connector
Dimension
L125×W52×H40mm
Package Size
L135×W70×H50mm
Weight (G.W)
300g
Ⅱ. Configuration Diagram:
DMX Input Terminal

LT- DMX-6803 DMX512 Decoder User’s Manual Page 4 of 14
6803 Data output terminal
Terminal definition：
Terminal
Function
DC+ DC-
DC5-24V power input
DATA
Data cord
CLK
Clock cord
NC
No connection
GND
Ground cord
Warning: the power cable can’t connect the data port, otherwise it will
damage the decoder!
Ⅲ.Address Setting
This decoder can decode 96 DMX addresses, adopted Dip switch to set the
address, the Dip switches from 1 to 9 are a kind of binary value coding
switches, the 1st bit is LSC, the 9th bit MSC, can set 511 addresses totally.
DMX512 initial address code is equal to the total amount of the Dip switches’
numbers from 1 to 9, press Dip switch downward (ON: at position “1”), you
can get the number of its position, if press upward (at position “0”), the
value of its position is 0.
Only when the DIP switch FUN(10)＝OFF(at position “0”), DMX512
signal is accepted
Example 1: Set to 37
Set the 6th, 3rd, 1st bit of the DIP switch downward to “1”, others to “0”(Figure
1), the total sum from 1 to 9 is 32+4+1, so the DMX512 initial address code is
37.

LT- DMX-6803 DMX512 Decoder User’s Manual Page 5 of 14
Figure 1
Example 2:
Set DMX512 original address code as 385: Set the 9th, 8th, 1st bit of the DIP
switch downward to “1”, the rest to “0”(as Figure 2), the total sum from 1 to 9
is 256+128+1, so the DMX512 original address code is 385.
Figure 2
Ⅳ. Instructions on the testing function
The 10th DIP switch is FUN, acting as the function key.
FUN＝OFF works to receive DMX512 signals.
FUN＝ON works to test decoders as Figure 3:
SWITCH1－9 OFF：BLACK
SWITCH1 IS ON：RED
SWITCH2 IS ON: GREEN
SWITCH3 IS ON: BLUE
SWITCH4 IS ON: YELLOW
SWITCH5 IS ON: PURPLE
SWITCH6 IS ON: CYAN
SWITCH7 IS ON: WHITE
SWITCH8 IS ON: 7 CLOLOR JUMPING (8 speed steps)

LT- DMX-6803 DMX512 Decoder User’s Manual Page 6 of 14
SWITCH9 IS ON: 7 COLOR SMOOTH (8 speed steps)
Figure 3
See Figure 4, if multi dip switches are on, the function is subject to the last
switch.
Figure 4
Ⅴ. Connects with LED pixel lights：

LT- DMX-6803 DMX512 Decoder User’s Manual Page 7 of 14
Ⅵ.Conjunction Diagram (LED lights are all with LPD6803/D705 driving
chips)
1．Connects with LED pixel lights：
2．Connects to LED Hi-power wall washer：
Acoording to DMX512 protocol, in order to ensure a steady data transmission,
you should add a metalster(Metal Thin Film resistor，90-120Ω 1/4 W )at the end of
each layout of DMX data cable(between Foot 2 and Foot 3, Data + and Data -),
please also refer to your dmx console manual to select a correct resistor

LT- DMX-6803 DMX512 Decoder User’s Manual Page 8 of 14
Appendix：DMX Address Setting Table
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
123456789
NUMBER
123456789
NUMBER
123456789
NUMBER
100000000
001
001110000
028
111011000
055
010000000
002
101110000
029
000111000
056
110000000
003
011110000
030
100111000
057
001000000
004
111110000
031
010111000
058
101000000
005
000001000
032
110111000
059
011000000
006
100001000
033
001111000
060
111000000
007
010001000
034
101111000
061
000100000
008
110001000
035
011111000
062
100100000
009
001001000
036
111111000
063
010100000
010
101001000
037
000000100
064
110100000
011
011001000
038
100000100
065
001100000
012
111001000
039
010000100
066
101100000
013
000101000
040
110000100
067
011100000
014
100101000
041
001000100
068
111100000
015
010101000
042
101000100
069
000010000
016
110101000
043
011000100
070
100010000
017
001101000
044
111000100
071
010010000
018
101101000
045
000100100
072
110010000
019
011101000
046
100100100
073
001010000
020
111101000
047
010100100
074
101010000
021
000011000
048
110100100
075
011010000
022
100011000
049
001100100
076
111010000
023
010011000
050
101100100
077
000110000
024
110011000
051
011100100
078
100110000
025
001011000
052
111100100
079
010110000
026
101011000
053
000010100
080
110110000
027
011011000
054
100010100
081

LT- DMX-6803 DMX512 Decoder User’s Manual Page 9 of 14
Appendix：DMX Address Setting Table
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
123456789
NUMBER
123456789
NUMBER
123456789
NUMBER
010010100
082
101101100
109
000100010
136
110010100
083
011101100
110
100100010
137
001010100
084
111101100
111
010100010
138
101010100
085
000011100
112
110100010
139
011010100
086
100011100
113
001100010
140
111010100
087
010011100
114
101100010
141
000110100
088
110011100
115
011100010
142
100110100
089
001011100
116
111100010
143
010110100
090
101011100
117
000010010
144
110110100
091
011011100
118
100010010
145
001110100
092
111011100
119
010010010
146
101110100
093
000111100
120
110010010
147
011110100
094
100111100
121
001010010
148
111110100
095
010111100
122
101010010
149
000001100
096
110111100
123
011010010
150
100001100
097
001111100
124
111010010
151
010001100
098
101111100
125
000110010
152
110001100
099
011111100
126
100110010
153
001001100
100
111111100
127
010110010
154
101001100
101
000000010
128
110110010
155
011001100
102
100000010
129
001110010
156
111001100
103
010000010
130
101110010
157
000101100
104
110000010
131
011110010
158
100101100
105
001000010
132
111110010
159
010101100
106
101000010
133
000001010
160
110101100
107
011000010
134
100001010
161
001101100
108
111000010
135
010001010
162

LT- DMX-6803 DMX512 Decoder User’s Manual Page 10 of 14
Appendix：DMX Address Setting Table
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
123456789
NUMBER
123456789
NUMBER
123456789
NUMBER
110001010
163
011111010
190
100110110
217
001001010
164
111111010
191
010110110
218
101001010
165
000000110
192
110110110
219
011001010
166
100000110
193
001110110
220
111001010
167
010000110
194
101110110
221
000101010
168
110000110
195
011110110
222
100101010
169
001000110
196
111110110
223
010101010
170
101000110
197
000001110
224
110101010
171
011000110
198
100001110
225
001101010
172
111000110
199
010001110
226
101101010
173
000100110
200
110001110
227
011101010
174
100100110
201
001001110
228
111101010
175
010100110
202
101001110
229
000011010
176
110100110
203
011001110
230
100011010
177
001100110
204
111001110
231
010011010
178
101100110
205
000101110
232
110011010
179
011100110
206
100101110
233
001011010
180
111100110
207
010101110
234
101011010
181
000010110
208
110101110
235
011011010
182
100010110
209
001101110
236
111011010
183
010010110
210
101101110
237
000111010
184
110010110
211
011101110
238
100111010
185
001010110
212
111101110
239
010111010
186
101010110
213
000011110
240
110111010
187
011010110
214
100011110
241
001111010
188
111010110
215
010011110
242
101111010
189
000110110
216
110011110
243

LT- DMX-6803 DMX512 Decoder User’s Manual Page 11 of 14
Appendix：DMX Address Setting Table
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
123456789
NUMBER
123456789
NUMBER
123456789
NUMBER
001011110
244
111100001
271
010101001
298
101011110
245
000010001
272
110101001
299
011011110
246
100010001
273
001101001
300
111011110
247
010010001
274
101101001
301
000111110
248
110010001
275
011101001
302
100111110
249
001010001
276
111101001
303
010111110
250
101010001
277
000011001
304
110111110
251
011010001
278
100011001
305
001111110
252
111010001
279
010011001
306
101111110
253
000110001
280
110011001
307
011111110
254
100110001
281
001011001
308
111111110
255
010110001
282
101011001
309
000000001
256
110110001
283
011011001
310
100000001
257
001110001
284
111011001
311
010000001
258
101110001
285
000111001
312
110000001
259
011110001
286
100111001
313
001000001
260
111110001
287
010111001
314
101000001
261
000001001
288
110111001
315
011000001
262
100001001
289
001111001
316
111000001
263
010001001
290
101111001
317
000100001
264
110001001
291
011111001
318
100100001
265
001001001
292
111111001
319
010100001
266
101001001
293
000000101
320
110100001
267
011001001
294
100000101
321
001100001
268
111001001
295
010000101
322
101100001
269
000101001
296
110000101
323
011100001
270
100101001
297
001000101
324

LT- DMX-6803 DMX512 Decoder User’s Manual Page 12 of 14
Appendix：DMX Address Setting Table
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
123456789
NUMBER
123456789
NUMBER
123456789
NUMBER
101000101
325
000001101
352
110111101
379
011000101
326
100001101
353
001111101
380
111000101
327
010001101
354
101111101
381
000100101
328
110001101
355
011111101
382
100100101
329
001001101
356
111111101
383
010100101
330
101001101
357
000000011
384
110100101
331
011001101
358
100000011
385
001100101
332
111001101
359
010000011
386
101100101
333
000101101
360
110000011
387
011100101
334
100101101
361
001000011
388
111100101
335
010101101
362
101000011
389
000010101
336
110101101
363
011000011
390
100010101
337
001101101
364
111000011
391
010010101
338
101101101
365
000100011
392
110010101
339
011101101
366
100100011
393
001010101
340
111101101
367
010100011
394
101010101
341
000011101
368
110100011
395
011010101
342
100011101
369
001100011
396
111010101
343
010011101
370
101100011
397
000110101
344
110011101
371
011100011
398
100110101
345
001011101
372
111100011
399
010110101
346
101011101
373
000010011
400
110110101
347
011011101
374
100010011
401
001110101
348
111011101
375
010010011
402
101110101
349
000111101
376
110010011
403
011110101
350
100111101
377
001010011
404
111110101
351
010111101
378
101010011
405

LT- DMX-6803 DMX512 Decoder User’s Manual Page 13 of 14
Appendix：DMX Address Setting Table
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
123456789
NUMBER
123456789
NUMBER
123456789
NUMBER
011010011
406
100011011
433
001100111
460
111010011
407
010011011
434
101100111
461
000110011
408
110011011
435
011100111
462
100110011
409
001011011
436
111100111
463
010110011
410
101011011
437
000010111
464
110110011
411
011011011
438
100010111
465
001110011
412
111011011
439
010010111
466
101110011
413
000111011
440
110010111
467
011110011
414
100111011
441
001010111
468
111110011
415
010111011
442
101010111
469
000001011
416
110111011
443
011010111
470
100001011
417
001111011
444
111010111
471
010001011
418
101111011
445
000110111
472
110001011
419
011111011
446
100110111
473
001001011
420
111111011
447
010110111
474
101001011
421
000000111
448
110110111
475
011001011
422
100000111
449
001110111
476
111001011
423
010000111
450
101110111
477
000101011
424
110000111
451
011110111
478
100101011
425
001000111
452
111110111
479
010101011
426
101000111
453
000001111
480
110101011
427
011000111
454
100001111
481
001101011
428
111000111
455
010001111
482
101101011
429
000100111
456
110001111
483
011101011
430
100100111
457
001001111
484
111101011
431
010100111
458
101001111
485
000011011
432
110100111
459
011001111
486

LT- DMX-6803 DMX512 Decoder User’s Manual Page 14 of 14
Appendix: DMX Address Setting Table
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
DIP SWITCH
DMX ADDR
123456789
NUMBER
123456789
NUMBER
123456789
NUMBER
111001111
487
000011111
496
100111111
505
000101111
488
100011111
497
010111111
506
100101111
489
010011111
498
110111111
507
010101111
490
110011111
499
001111111
508
110101111
491
001011111
500
101111111
509
001101111
492
101011111
501
011111111
510
101101111
493
011011111
502
111111111
511
011101111
494
111011111
503
111101111
495
000111111
504