The digital controller can supply high accuracy 256 degrees of intensity adjustment for LED lights, which is easy to operate and has high output accuracy. The controller not only can be invoked as normal power controller but also as strobe controller. It can be controlled by push-on button, RS232, USB, RJ45 (remote control) etc. The strobe controller can achieve by signal communication and external trigger. As the preferred choice of the light power source, the digital controller is perfect for the light with high control requirement.
The Features of the Digital Controller
1.Having 256 degrees high precision change to control the intensity, the controller is easy to operate by using push-on button or PC while every single channel is individually adjustable;
2.The digital showing screen shows the range of the intensity and can operate through push-on button;
3.The digital controller can use communication methods like RS232, RJ45, USB etc. and eight controllers can be operated at the same time when using RJ45 to communicate;
4.Can observe whether the corresponding channels are turned on or not through the corresponding LED;
5.The high speed opt coupler is adopted and the trigger level can be selected to get fast response and high reliability;
6.Having a function of memory that can show the previous shutdown content automatically after restarting.
Parameters of the Digital Controller
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Model
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LTS-DPC24##-#S
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LTS-DPC24120-8
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Remarks
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Communication modes
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RS232
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RS232，USB，RJ45
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Eight controllers can be operated through a PC
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Intensity adjustment mode
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PWM adjustment
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Adjusting voltage by changing the duty cycle of PWM
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Trigger delay time
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<40us
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Load related
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External trigger frequency
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＜1/T
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Decide by trigger cycle, e.g.: T=1ms,then external trigger, the maximum frequency is up to 1K
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External trigger input voltage
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High level 5-24V, low level 0-1.5V
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Positive or negative trigger is optional
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NO. of channels
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Channel 2、4
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Channel 8
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Intensity adjustment level
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256 level regulation
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Driving mode
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Constant voltage, Change the duty cycle
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Input voltage
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170-260V
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Standby power
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＜3W
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The Using Method of the Digital Controller
Display Panel Description
（1）The Function of Intensity Adjust Key
The first button from left (S) is selection key, by which you can press to switch channel and then 4 channels can be set up;
The second button from left (+) is series plus, the intensity increases one level and the digital tube plus 1 with every press;
The third button from left (-) is series minus, the intensity decreases one level and the digital tube minus 1 with every press.
（2）The Content of Digital Showing Screen
The first bit from left is channel display bit, display numbers would switch between “1、2、3、4、H” when press “S” key, “1” to “4” is the current set channel and “H” is the selection of trigger function.
When the channel value is between “1”-“4”, expressing in decimals, the after three bit as the parameter status bit and the value can be adjusted from 000~255.When the channel value is “H”, the selections are 1 and 0 only, (1 is the positive trigger and the output is open; 0 is the negative trigger and the output is off.)
For example: “1050” displayed on the digital showing screen means the first channel intensity level is 50 degrees.
When “H 1” is displayed, it means all output is open currently (at this time, if there is a high-level of access from the trigger, then the corresponding channel will be closed.)
（3）Special cases
When the channel value is “000”, then the corresponding channel has no voltage output.
While any channel’s parameter status bit value is in the range of 001~255, then the corresponding channel outputs normally.
After the power supply is switched on and the controller is turned on, the digital tube display output is saved as the last time data before the controller is closed. E.g.: When the controller is closed, it displays “3168”. The display output would be “3168” also when it restarts.
Back interface description
（1） Light Source Interface
As shown in the figure above, there are four channels output interface, “CH1”, “CH2”, “CH3”, and “CH4”. The maximum of output voltage is 24V adjustable and the light can be connected directly.
（2）Trigger Interface
The controller has a total of four channels trigger input corresponding to the four output channels individually. Connect the trigger signal to the “+” and “-” pole of the corresponding input when the external trigger is necessary to triggered.
（3） RS232 Interface
After connecting to PC with the null modem cable, RS232 can be used to communicate with the PC and through LOTS’ digital control software or self-programming can achieve the adjustment of PC towards the light.
Wiring Method
（1）Connect the light source with the controller. (Refer to the wiring diagram)
（2）If the external trigger control is needed, the external trigger signal source has to connect to the controller. (Refer to the wiring diagram)
（3）Access powers (220VAC), press the red switch button "-", "O" raised, the indicator light on, indicating that the power has been on.
（4）If you need to use the computer to control the intensity of the light, please use RS232 data cable to connect the PC with the controller in the shutdown state and then use the Demo program that provided by us or your company’s own self-program to conduct the control. While using the serial port to operate, the parameters of each channel can still be set manually, that is, the host computer and the controller can set the parameters, and do not need to carry out the mode conversion. Please refer to the following chapters for Demo program instructions.
External Trigger Instructions
The trigger of the controller consists of two modes, which are positive and negative, and the client can choose the trigger mode flexibly according to the actual situation.
Positive trigger: (light is on without trigger access)
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Trigger signal input situation
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Suspended or low level 0V-1.5V
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High level 5V-24V
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External light response situation
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Light is on
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Light is off
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Negative trigger: (light source is off without trigger access)
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Trigger signal input situation
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Suspended or low level 0V-1.5V
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High level 5V-24V
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External light response situation
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Light is off
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Light is on
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The controller needs to set the trigger mode through the button:
The output is closed when the controller displays “H 1”. It means the positive trigger and trigger interface access to high level (5-24V); the output is open when removed the trigger signal or the trigger signal level is changed to (0-1.5V).
The output is open when the controller displays “H 0” it means the negative trigger and trigger interface access to high level (5-24V); the output is closed when removed the trigger signal or the trigger signal level is changed to (0-1.5V).
Note: the above situation is in the absence of communication with PC, only the response to an external trigger.
Communication Parameters
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Baud rate
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9600 bps
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Data length
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8 bits
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Stop bit
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1 bit
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Parity check
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None
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Communication Data Format (details please refer to the communication protocol)
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Word length
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1 byte
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1 byte
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1 byte
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3 byte
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2 byte
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Functions
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Tagged word
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Command word
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Channel word
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Data word
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XOR and check word
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Manually Set the Parameters
Intensity Setting
After the power supply is switched on and the controller is turned on, the digital tube display output is saved as the last time data before the controller is closed. E.g.: When the controller is closed, it displays “3168”. The display output would be “3168” also when it restarts.
（1）Press the select key "S" to switch the channel to be operated, and the value is adjustable from 1-4;
（2）Press the button "+", the current channel brightness level increased and stop at 255;
（3）Press the button "-", the current channel intensity level decreases and stops at 000.
Positive and Negative Trigger Settings
Press the select key switch to "S", "H", press the button "+" and "-" for the selection of positive and negative trigger, 1 is positive trigger, the outputs are all opened. 0 is negative trigger, the outputs are all closed.
Demo Program Instructions
（1）Serial port selection: select the serial port controller and computer communication serial port, the default to COM1;
（2）Function selection: select the control function, as shown in figure, the default function of the software is "inttensity settings";
（3）Channel selection: select the light corresponding channel that need to be controlled, a total of four channels, CH1, CH2, CH3, CH4 can be used to one-to-one match to the output port of the digital power, the default to CH1;
（4）Intensity level: select the output channel intensity level, in the range of 0 ~ 255, the default value to 50; this option is only effective in the selection of "intensity settings" in function selection;
（5）Send key: take the parameters above in accordance with the communication protocol and send the command string to the controller;
（6）Channel switch: control the opening and closing of a particular channel;
（7）Intensity slider and adjustment: drag the slider to adjust the intensity level of the light;
（8）Status display: computer and digital power communication’s status display. When the communication is success, the status bar displays “succeed” (success); when the communication fails, the status bar displays "failure" (fail);
（9）Exit: exit program.
Models of the Digital Controller
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Type
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Model
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Voltage
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Power
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Number of channels
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Remarks
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The Digital Controller
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LTS-DPC2424-2S
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24V
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24W
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2
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Have communication and trigger function
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LTS-DPC2460-4S
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24V
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60W
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4
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LTS-DPC2475-4S
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24V
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75W
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4
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LTS-DPC24120-8
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24V
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120W
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8
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Dimensions
1.LTS-DPC2424-2S
2.LTS-DPC2460-4S
3.LTS-DPC2475-4S
4.LTS-DPC24120-8
