Ltech LT-840-6A Manual Download Page 1

Input  Signal: 

Input  Voltage: 

Current  Load: 

Max  Output  Power: 

DMX512  Socket: 

DMX512,  RDM

5~24Vdc

6A×4CH   Max  24A

120W/288W/576W(5V/12V/24V)

XLR-3,  RJ45,  Green  Terminal 

LT-840-6A

Dimming  Range: 

Working  Temperature: 

Dimensions: 

Package  Size: 

Weight  (G.W.): 

0~100%

-30

~65

L156×W78×H40(mm)

L180×W82×H48(mm)

445g

LT-840-6A

DMX/RDM  4CH  CV  DECODER 

LT-840 6A DMX/RDM 4CH CV Decoder

-

LT-840-6A  w

bi-directional communication,  achieves remote management  of reading and writing DMX address (DMX 

master controller must recognize  the RDM protocol).  Equipped  with  DMX standard XLR-3,  RJ45,  green 

terminal  interface.  Realize  0-100%  dimming  or  different  lighting  effect;  workable  with  single  color, 

bi-color, RGB or RGBW LED lamps.

ith  the  standard  RDM  remote  device  management  protocol,  supports  DMX512  signal 

1.   Product  Parameter:

1

2.   Product  Size:

3.   Configuration  Diagram:

warranty

5  years

Power Input Socket

Address 

Dip Switch

Green

 

Terminal

(with amplifier function)

 

XLR

-

3

RJ45

LED

 

Lamps

Connection

 

Socket

LT-840-6A DMX/RDM 4CH CV Decoder

4.3   DMX  Dimming  Instruction:

 Dip Switch Operation:

4.

RDM Mode: 

The dip

 

switch

 

1

-

10 are OFF

.

FUN

=

ON

 

(the 10th dip switch=ON)

    

    

Self-testing Mode: 

FUN

=

OFF

 

(the 10th dip switch = OFF)

      

DMX

 

Mode: 

Setting DMX addresses with dip switch 1-9  

FUN

=

OFF

 

(the 10th dip switch

)

     

 

Mode

=OFF

DMX

 

4.1  How to set DMX address via dip switch:

E.g.1: Set Initial Address To 32.

E.g.2: Set Initial Address To 37.

E.g.3: Set Initial Address To 178.

001+004+032=37

002+016+032+128=178

4.2  Self-testing Mode

:  

DMX address value = the total value of (1-9), to get the place value when in “on” position, 

otherwise will be 0. 

FUN

=

ON

 

(the 10th dip switch=ON)

        

Self-testing Mode

1

=

on

4

=

on

7

=

on

8

=

on

9

=

on

2

=

on

5

=

on

3

=

on

6

=

on

Self-test
Function

1

-

9

=

off

Dip Switch

Static 
Black

Static 

Red

Static 

Red

Static 

Green

Static 

Green

Static 

Blue

Static 

Blue

Static 

Yellow

Static 

Yellow

Static 

Purple

Static 

Purple

Static 

Cyan

Static 

Cyan

Static
White

Static

White

7 Colors 

Jumping

7 Colors 

Jumping

7 Colors 

Smooth

7 Colors 

Smooth

[Attn]

 

When several dip switches are on, subjected to the highest switch value

.

           As the figure above shows, the effect will be 7 colors smooth at 7 speed level.

For changing effects (Dip Switch 8 9=on)

:

 

 

  /

DIP switch 1-7 is used

 

to realize 7 speed 

levels. (7

=

on, the fastest level)

OFF

ON

CH4  0-255

PWM 

LED  W)

0-100%  (

CH4

CH1  0-255

CH2  0-255

CH3  0-255

Each LT-840 6A DMX decoder occupied 4 DMX 

addresses when connecting the DMX console. 

-

PWM  0-100%  (LED  R)

PWM 

LED  G)

0-100%  (

PWM 

LED  B)

0-100%  (

CH1

CH2

CH3

DMX Console

DMX Decoder

E.g., the defaulted initial address is 1, please find 

their corresponding relationships in the form.

2

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