THORLABS DC4100 User manual

4 Channel LED Driver
DC4100
Operation Manual
2022

Version:
Date: 2.2 31-Jan-2022
Copyright © 2022 Thorlabs

Foreword
Contents
1 General Information 1
11.1 Ordering Codes and Accessories 21.2 Supported Thorlabs LEDs 21.3 Requirements 21.3.1 Hardware Requirements 21.3.2 Software Requirements
2 Getting Started 3
32.1 Parts List 32.2 Preparation
3 Operating Instructions 4
53.1 Operating Elements 53.2 Operation Modes 53.2.1 Constant Current Mode 63.2.2 Brightness Mode 83.2.3 External Control Mode 83.3 Settings and Configuration 93.3.1 User Limit 103.3.2 Settings 103.3.3 About
4 Computer Interface 11
114.1 Software Installation 124.2 Firmware Update 134.3 Driver Installation 134.4 Operating the DC4100 Series remotely 134.4.1 Connecting a Device 144.4.2 Constant Current Mode 154.4.3 Brightness Mode 164.4.4 External Control Mode 164.4.5 User Limit Current 174.4.6 Device Information 184.4.7 Help Menu
5 Maintenance and Service 19
195.1 Version Information 195.2 Troubleshooting
6 Appendix 21
216.1 Technical Data 226.2 Dimensions

236.3 Command Reference 246.3.1 Set User Current Limit 246.3.2 Get User Current Limit 246.3.3 Set Maximum Current Limit 246.3.4 Get Maximum Current Limit 246.3.5 Set Operation Mode 246.3.6 Get Operation Mode 256.3.7 Set Selection Mode 256.3.8 Get Selection Mode 256.3.9 Set LED OnOff 256.3.10 Get LED OnOff 256.3.11 Set Constant Current 256.3.12 Get Constant Current 266.3.13 Set Percental Brightness 266.3.14 Get Percental Brightness 266.3.15 Set Display Brightness 266.3.16 Get Display Brightness 266.3.17 Get Status Register 266.3.18 Error Message 276.3.19 Identification Query 276.3.20 Revision Query 276.3.21 LED Head Identification Query 276.3.22 Get Wavelength 276.3.23 Get Forward Bias 286.3.24 Status Reporting 296.4 Safety 306.5 Return of Devices 306.6 Manufacturer Address 306.7 Warranty 306.8 Copyright and Exclusion of Liability 316.9 Certifications and Compliances 326.10List of Acronyms 336.11Thorlabs Worldwide Contacts

© 2022 Thorlabs
We aim to develop and produce the best solutions for your
applications in the field of optical measurement techniques. To help
us to live up to your expectations and constantly improve our
products, we need your ideas and suggestions. We and our
international partners are looking forward to hearing from you.
Thorlabs GmbH
Warning
Sections marked by this symbol explain dangers that might result in
personal injury or death. Always read the associated information
carefully before performing the indicated procedure.
Please read this advice carefully!
This manual also contains "NOTES" and "HINTS" written in this form.
Attention
Paragraphs preceded by this symbol explain hazards that could
damage the instrument and the connected equipment or may cause
loss of data.
Note

Page 1 20442_D02
DC4100 1 General Information
1 General Information
Thorlabs' DC4100 four-channel LED controller is designed for microscopy and other applica-
tions that require multiple color channels. It is the ideal driver for the LED4D series of four-
wavelength LED sources. Via the optional DC4100-HUB, it can concurrently drive 4 LEDs like
the Thorlabs collimated or uncollimated mounted LEDs . Using the DC4100-HUB connector
hub and 4 CAB-LEDD1 connection cables, the driver can also be used with 4 Thorlabs LEDs
on metal-core PCB or with 4 user-supplied LEDs. The LED current of each channel can be ad-
justed independently from 0 to 1000 mA or modulated via an external voltage.
The DC4100 can be operated in constant current mode (setting the LED current in mA), bright-
ness mode (setting the LED as a percentage of its maximum current) or external control mode,
applying modulation through an external signal generator.
Additionally, the LED driver can be operated remotely via the USB 2.0 interface by the DC410x
software package. The LED drivers are also compatible with µManager, a versatile, open
source, GUI software platform for automated microscopy. A plugin allows the user to control the
LED drivers right out of the box.
The DC4100 controls all activated LEDs by the same modulation signal while each LED can be
individually deactivated. The controller accepts voltages ranging from 0 to 10 V, with 1 V corre-
sponding to an LED current of 100 mA.
1.1 Ordering Codes and Accessories
DC4100
4 Channel LED Driver for Thorlabs LED4D Series Four-Wavelength LED
Sources with 12V Power Supply and USB 2.0 Cable. Simultaneous Mod-
ulation of up to 4 Activated LEDs. Driver for Individual Supported
LEDs Using the DC4100-HUB.
Optional Accessories:
LED4Dxxx
4-Wavelength High-Power LED Source.
DC4100-HUB
Hub to Connect to DC4100 in Order to Control up to 4 Thorlabs Suppor-
ted LEDs with M8 x 1 Circular Connector.
PCB Mounted LEDs
(MxxxDy)
These LEDs Require Attachment via an CAB-LEDD1 Cable to the
DC4001-HUB, Connected to the DC4100.
Mounted LEDs
(MxxxLy, MxxxLPy)
These LEDs Require Attachment to the DC4100 via the DC4001-HUB.
Fiber Coupled LEDs
(MxxxFy, MxxxFPy)
These LEDs Require Attachment to the DC4100 via the DC4001-HUB.
Collimated LEDs
(MxxxLy-Cz,
MxxxLPy-Cz)
These LEDs Require Attachment to the DC4100 via the DC4001-HUB.
Please visit our homepage http://www.thorlabs.com for further information.
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Rev: 2.2, 31-Jan-2022 © 2022 Thorlabs Page 2
DC4100 1 General Information
1.2 Supported Thorlabs LEDs
The following types of Thorlabs LEDs are compatible with the DC4100-HUB, which can be at-
tached to the DC4100:
·PCB Mounted LEDs
oMxxxDy
These LEDs require attachment via the CAB-LEDD1 cable.
·Mounted LEDs
oMxxxLy
oMxxxLPy
·Fiber Coupled LEDs
oMxxxFy
oMxxxFPy
·Collimated LEDs
oMxxxLy-Cz
oMxxxLPy-Cz
1.3 Requirements
1.3.1 Hardware Requirements
·Processor (CPU): 1 GHz or higher
·Memory (RAM): 256 MB
·Graphic Card with at least 32 MB memory
·Hard Drive: Min. 100 MB of available disk space
·Interface: Free USB 2.0 port
1.3.2 Software Requirements
The DC4100 software is compatible with the following operating systems:
·Windows ®XP (32-bit) SP3
·Windows ®Vista (32-bit, 64-bit)
·Windows ®7 (32-bit, 64-bit)
·Windows ®10 (32-bit, 64-bit)
For operation of the DC4100, also an NI-VISA™ (version 5.1.1 or higher) is required. This NI-
VISA™ engine comes with the installation package in the download, but can also be down-
loaded also from National Instruments' website www.ni.com.

Page 3 20442_D02
DC4100 2 Getting Started
2 Getting Started
2.1 Parts List
Please inspect the shipping container for damage. Please do not cut through the cardboard, as
the box might be needed for storage or returns.
If the shipping container appears to be damaged, keep it until you have inspected the contents
for completeness and tested the DC4100 mechanically and electrically.
Verify that you have received the following items within the package:
1. DC4100 LED Driver
2. Power Supply (12V / 5.5A)
3. Power Cord, Connector According to Ordering Country
4. USB 2.0 Cable
5. Quick Reference
2.2 Preparation
1. Connect the cable from the LED4Dxxx four-color light source to the socket labeled 'LED' at
the back of the main control unit.
2. Alternatively, a DC4100-HUB can be connected to this socket. This allows to drive up to 4 of
the supported LEDs via the standard Thorlabs LED connector. Please see the figure be-
low. For PCB mounted LEDs, please use the CAB-LEDD1 adapter cable.
3. Connect the power supply cable to the main control unit. Please use only the power supply
which is included in the shipment of the DC4100 unit.
4. Plug in power supply.
5. Turn the unit on by pressing the power switch on the rear side of the unit.
6. After the device is powered up, the graphics display will show a 'Welcome' screen for a few
seconds.
7. The rated accuracy of the DC4100 is reached after a warm-up period of approximately 10
minutes.
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DC4100 3 Operating Instructions
3 Operating Instructions
The DC4100 can be ontroled directly ont he device or remotely via the DC41xx software.
In the device, the DC4100 is controlled by three buttons and the multi-control knob on the front
panel. Please see the chapter Operating Elements . The two buttons below the graphics dis-
play have an Escape and Enter (OK) functionality. The 'LED' Button is used to switch LED(s)
on or off. The multi-control is used to select the desired menu or to change the settings.
After switching on the DC4100 a 'Welcome' screen appears for a few seconds.
In case no LED head is connected you will be prompted to switch off the main unit, connect the
LED head and switch on the device.
The display will show the screen of one of the three LED operation modes (Constant Current,
Brightness or External Control Mode). The 'Main Menu' can be accessed via the 'ESC' button.
To select an operation mode or a configuration display the multi-control knob is used. Press the
'Ok' button to enter the selected item.
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Page 5 20442_D02
DC4100 3 Operating Instructions
3.1 Operating Elements
Operating elements on the front panel
Operating elements on the rear panel
3.2 Operation Modes
For safety reasons the LED can be switched on only if one of the three operation modes (Con-
stant Current, Brightness or External Control) is selected.
It is possible to leave the active mode when the LED is switched on and enter the main menu.
However, the LED needs to be switched off before you can enter another operation mode. This
can be done while the main menu is selected by pressing the LED button.
The last selected operation mode will be saved. After switching on the DC4100 again this oper-
ation mode will be automatically restored. All settings are saved and validated after a shut off.
3.2.1 Constant Current Mode
The 'Constant Current Mode' provides a constant non-modulated LED current.
The actual current for each channel is displayed. If you connected a supported Thorlabs
LED (features and EEPROM) or the 4 Color LED LED4Dx, the corresponding wavelength
will be displayed instead of the channel number. There are two different output modes, 'Single
Selection' and 'Multi Selection'. The output mode can be selected in the 'Setting' menu (see
Settings) .
The 'Multi Selection Mode' is illustrated by square indicators. More than one LED at a time can
be switched on. This is indicated by the check mark in the square box.
The 'Single Selection Mode' features circles as output indicators, which are filled with a dot
when the LED is on. Only one LED at a time can be switched on within this mode. This eases
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DC4100 3 Operating Instructions
quickly switching between two LEDs. It is not necessary to switch off a LED prior to switching
on another LED.
Select a channel with the multi-control knob and press the 'LED' button to switch the LED on or
off, respectively. If you press and hold the 'LED' button for more than 3 seconds you will switch
on all LEDs at once. To turn all LEDs of If they LEDs are switched on, press and hold the 'LED'
button for more than 3 seconds.
If no LED is connected to a channel it will be marked with 'n/a'.
In order to change the current applied to a connected LED channel, which changes the bright-
ness, this channel needs to be selected using the multi-control knob and confirmed with the
'OK' button. A new screen appears and the current for the selected channel can be set directly
using the multi-control knob. The change takes affect immediately. To confirm the adjusted cur-
rent, press the 'OK' button. To cancel the set current, press the 'ESC' button. Both actions will
return the user to the channel selection menu. The LED current can be changed when the LED
is off as well as when it is in operation. This allows to increase or reduce the brightness of the
LED. The current limit is displayed at the bottom of the screen. In the upper left corner the se-
lected channel is displayed.
Return to the main menu with the 'ESC' button.
The faster the multi-control knob is turned, the greater is the adjustment ratio of the current.
Move the knob slowly to set the current with a 1mA resolution. Move it faster and the resolution
increases up to a 200mA resolution.
3.2.2 Brightness Mode
This mode can be used to apply a constant current in terms of percentage. This can be useful if
two or more LEDs are superimposed. A maximum current can be defined, which corresponds
to 100%. Each channel can be set individually or all channels can be set simultaneously.
The actual brightness in percent for each channel is displayed. If a supported Thorlabs LED
with an internal EEPROM is connected via the DC4100-HUB, or if the 4 Color LED LED4Dx is
connected, the corresponding wavelength will be displayed instead of the channel number.
There are two different output modes: 'Single Selection' and 'Multi Selection'. The output mode
can be selected in the 'Settings' menu (see Settings) .
The 'Multi Selection Mode' is illustrated by square indicators. More than one LED at a time can
be switched on and is indicated by a check mark in the square box.
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Page 7 20442_D02
DC4100 3 Operating Instructions
The 'Single Selection Mode' features circles as output indicators which are filled when the LED
is on. Only one LED at a time can be switched on within this mode. This is convenient to quickly
switch between two LEDs. It is not necessary to switch a LED off prior to switch on another
LED.
Select a channel with the multi-control knob and press the 'LED' button to switch the LED on or
off, respectively. Press and hold the 'LED' button for more than 3 seconds to switch on all LEDs
at once. If all LEDs are already on you can switch them off using the same procedure.
If no LED is connected to a channel it will be marked with 'n/a'.
In order to change the brightness of a LED on a certain channel, this channel needs to be se-
lected using the multi-control knob and confirmed with the 'OK' button. A new screen appears
and the brightness of the selected channel can be set directly using the multi-control knob. The
change takes affect immediately. To confirm the adjusted brightness, press the 'OK' button. To
reject the set brightness, press the 'ESC' button. Both actions yield back to the channel selec-
tion menu. The LED brightness can be changed when the LED is off as well as when it is in op-
eration. This allows to increase or reduce the brightness of the LED. The resulting current is
displayed at the bottom of the screen. In the upper left corner the selected channel is dis-
played.
Return to the main menu by pressing the 'ESC' button.
Use the brightness mode to set the brightness of all channels simultaneously. Select 'All Chan-
nels' in the channel selection menu and confirm by 'OK' button. Now the brightness in percent
can be set and will take affect immediately. The value in percent is the same for all channels.
The adjusted brightness can be confirmed with 'OK' or rejected with 'ESC'. The dispaly will re-
turn to the channel selection menu.
The current corresponding to 100% brightness is defined in the panel 'User Limit' or by the max
current read from the EEPROM of a supported Thorlabs LED . Select 'User Limit' from the
main menu to change this value.
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DC4100 3 Operating Instructions
The faster the multi-control knob is turned, the greater is the adjustment ratio of the brightness.
Move the knob slowly to set the current with a 0.1% resolution. Move it faster and the resolution
will increase up to a 20% resolution.
3.2.3 External Control Mode
Use the 'External Control Mode' to modulate/control the DC4100 by an signal from an external
signal generator. The appropriate LED channel must be enabled in the External Control Mode
menu.
The 'External Control Mode' has no parameter settings. The LEDs can only be controlled via
the BNC connector at the rear panel of the DC4100. The applied voltage corresponds to the
LED current where 1V is equivalent to an LED current of 100mA. A maximum voltage of 10V
can be applied, which results in a current of 1000mA.
Note The maximum current is defined by the user in the 'User Limit' menu.
The modulation frequency range is 0 kHz to 100 kHz and valid for sine wave modulation. The
input will affect all channels. To enable or disable one or more LEDs select the corresponding
LED by turning the multi-control knob and press the 'LED' button. Depending on the selected
output mode only one LED or all 4 LEDs can be enabled. The output mode can be changed
within the 'Settings ' menu.
The 'Single Selection Mode' allows to enable only one LED at a time. It is indicated by a circle.
If an LED is enabled there is a dot within this circle.
The 'Multi Selection Mode' offers the possibility to enable up to four LEDs. It is represented by
square boxes and a check mark indicates an enabled LED.
3.3 Settings and Configuration
Settings and system configurations can be accessed via the main menu. To enter the main
menu from one of the operation modes press the 'ESC' button.
Select an item with the multi-control knob and press the 'Ok' button to access the desired set-
ting or configuration panel.
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Page 9 20442_D02
DC4100 3 Operating Instructions
3.3.1 User Limit
The current limit can be changed by selecting 'User Limit'. The following screen appears. Select
a channel and confirm with the 'OK' button.
Now the LED current limit can be set using the multi-control knob. The new value has to be
confirmed with the 'Ok' button or canceled with the 'ESC' button. The LED current limit can be
set up to the maximum LED current limit (LED Imax). It is displayed on the bottom of the
screen. Certain LED sources have an EEPROM, which contain data about the LED like maxi-
mum current. LEDs without an EEPROM will show 1000mA as maximum LED current limit.
Note
The User Limit current corresponds to 100% brightness in the 'Brightness Mode'.
Attention
A 'User Limit' which exceeds the maximum current of the LED can cause damage to the LED.
Prior to changing the LED maximum current limit of the LED head check if the LED can handle
this current!
LED Configuration
For LEDs with an EEPROM, the LEDs maximum current can be temporarily reconfigured. This
value remains valid until the DC4100 is switched off. After switching on, the individual LED's
limit current is read out from the EEPROM and becomes valid.
Warning
Exceeding a given limit may lead to destruction of the LED. Please be aware of the fact, that no
warranty applies for the LED in such case!
The modification of LED's max. current is a hidden entry in the 'User Limit Current' menu: Go to
the 'User Limit' screen described above and select the channel. Then press and hold the 'LED'
button for about three seconds.
A sub menu appears and the LED's maximum current can be set. Press the 'Ok' button to se-
lect the 'Maximum Current Limit' menu. The multi-control knob is used to change the value and
has to be confirmed with the 'Ok' button or canceled with the 'ESC' button.

Rev: 2.2, 31-Jan-2022 © 2022 Thorlabs Page 10
DC4100 3 Operating Instructions
3.3.2 Settings
Within the system configuration the LCD backlight brightness can be set. Select 'Settings' from
the main menu via the multi-control knob and press 'Ok'. A sub menu appears and the 'Bright-
ness' setting can be accessed by pressing the 'Ok' button. The multi-control knob is used to
change the brightness of the LCD backlight between 0 and 100%. Confirm your setting with 'Ok'
or cancel it with 'ESC'.
The additional menu item 'Selection' in the 'Settings' section describes the output mode. The
'Single Selection Mode' allows to switch on only one LED at a time, while within the 'Multi Selec-
tion Mode' any configuration and up to all four LEDs can be switched on together.
3.3.3 About
The item 'About' gives information about the firmware version, serial number of the DC4100
and the connected LED head if available.

Page 11 20442_D02
DC4100 4 Computer Interface
4 Computer Interface
The DC4100 comes with a USB 2.0 interface to connect the DC4100 to a PC. This provides a
remote control capability via the Thorlabs USB remote control software. For flexible user applic-
ations, Thorlabs provides the device drivers for users who want to create an own remote control
application, e.g. using C or LabVIEW®.
4.1 Software Installation
Note
Please make sure to have administrator privileges on the PC to be used, in order to install the
software.
Download the software from the Thorlabs DC41xx website.
Install the software by double clicking the .exe file.
Note
For remote operation of a DC4100, a 'NI-VISA™ Engine' of version 5.1.1 or higher must be in-
stalled on your system. The DC4100 Series software installer package contains this VISA
Runtime Engine and checks your system. If it is not installed, or an earlier version is recog-
nized, the installer will automatically install it to your computer. After Installation you might be
prompted to reboot your PC - please see detailed description as below.
Select 'DC4100 Series - Application Software' from the installation menu and follow the instruc-
tions. Below the installation to a Windows 7 ©operating system is described.
If the NI VISA Runtime V 5.1.1 is not installed yet the Wizard starts its installation and you
might need to restart the computer following the installation. Otherwise the wizard skips NI-
VISA installation and proceeds with the installation of the DC4100 Series application soft-
ware.
Please accept the license agreement.
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DC4100 4 Computer Interface
4.2 Firmware Update
The firmware of the DC4100 can be updated by the user via the USB interface with firmware
update files from the DC410x website.
The firmware .zip file includes the files required for the firmware update:
1. Windows batch file Upload_DC4100_Firmware.bat
2. hex file DC4100.hex
3. sig.hex file, a CHOICE.EXE
4. AVROSP.exe
5. ATmega1281.xml
Additionally, the change log file is saved. All these files need to be in the same directory for a
successful firmware update.
Please follow these steps:
1. Turn off the DC4100.
2. Download the firmware .zip file to the PC to be connected to the DC4100.
3. Connect the DC4100 to the PC.
4. Start the DC4100 in the bootloader status: press the 'LED' button and keep it pressed
while switching on the device with the power switch. The display of the DC4100 shows
'DC4100 BOOTLOADER'.
5. Determine the COM port used by the DC4100 via the device manager on your PC.
6. Open the ZIP file on your PC.
7. Open the .bat file. the terminal window will open and asks to select the COM port to be
used.
8. Press 1, 2, 3, 4, 5, 6, 7, 8, or 9 in the terminal window to assign the respective COM port.
The firmware update will start automatically.
9. The DC4100 display will indicate the download of the new firmware.
10. Do not switch off the DC4100 or disconnect the USB cable during the firmware download.
11. Please wait until the update process in completed as indicated on the display and in the
terminal.
5

Page 13 20442_D02
DC4100 4 Computer Interface
4.3 Driver Installation
On the software download website, please also find an Instrument Driver package for DC4100
for programming in C, .Net. These drivers are being installed automatically together with the
Remote Control Application software and can be found at:
C:\Program Files\IVI Foundation\VISA\WINNT\Thorlabs DC4100 Series
In this directory you will find the drivers, a Programmer's Reference Manual and a sample for
C.
If the installer recognized a LabVIEW®installation on your PC, a LabVIEW®container file will
be installed to the recognized LabVIEW®installation folder. For example, in case of a standard
installation of a 32 bit LabVIEW 2011 to a Win7 64 bit system the path is:
C:\Program Files (x86)\National Instruments\LabVIEW 2011\instr.lib\DC4100 Ser-
ies\TLDC4100.llb
The TLDC4100.llb contains a number of driver VIs and a sample VI. They can also be ac-
cessed via the LabVIEW functions Palette ( -> Instrument I/O -> Instr Drivers -> TLDC4100).
4.4 Operating the DC4100 Series remotely
4.4.1 Connecting a Device
Please connect the DC4100 to your PC with the shipped USB cable. The USB socket is labeled
'USB' at the back of the main control. Windows recognizes the connected instrument and auto-
matically loads the necessary drivers:
To start the remote application, double click to the "DC4100 Series" software icon on your
desktop.
Use the green button or the menu option 'Connect...' to open the device selection dialog.

Rev: 2.2, 31-Jan-2022 © 2022 Thorlabs Page 14
DC4100 4 Computer Interface
Select your DC4100 - 4 Channel LED Driver and click 'Accept'. The device will be connected
and the last active mode will be entered. The upload of the actual values on the system may
take some seconds.
You can disconnect the DC4100 by clicking on the 'Disconnect' button or by selecting 'Menu ->
Disconnect':
4.4.2 Constant Current Mode
The constant current can be selected by pressing the 'Constant Current Mode' tab. All connec-
ted LEDs must be switched off.
The value can be changed directly by typing into the numeric control, using the small arrows, or
changing the slider. If you enter a numerical value, please press 'Enter' to confirm it. The maxi-
mum value depends on the user current limit, which is set in the configuration menu.
The individual LEDs can be switched on or off by clicking on the LED figure below the corre-
sponding slider. In the picture below, channel 2 and channel 4 are switched on.
The button in the left lower corner is used to change between the output modes 'Single Selec-
tion' and 'Multi Selection'. Within the 'Single Selection Mode' only one LED can be switched on
while within the 'Multi Selection Mode' up to four LEDs can be used.

Page 15 20442_D02
DC4100 4 Computer Interface
If no LED is connected the controls for the corresponding channel are disabled. The supported
Thorlabs LEDs feature an EEPROM and the information is imported and used for the maximum
current limit and the display of the wavelength. The wavelength is displayed as color. In the
above picture a Thorlabs LED4Dxx is connected. If no wavelength information is available the
LED is displayed grey.
4.4.3 Brightness Mode
In this mode, the brightness of the individual LED is controlled relative to the max. LED current.
The maximum LED current equals 100% and is the value set in the configuration menu (User
Limit), or the value imported from the LED EERPOM. The resulting current for each LED chan-
nel is displayed below the numeric control (boxes "is equivalent to").
The value can be changed directly by typing into the numeric control, by using the small arrows,
or by changing the slider. If you enter a numerical value, please press 'Enter' to confirm it.
Each channel can be set individually by the corresponding control element. Using the control
elements 'All Channels' will set the same brightness value to all channels.
The individual LEDs can be switched on or off by clicking on the LED figure below the corre-
sponding slider. In the screenshot below, all LED are switched on.
The button in the left lower corner is used to change between the output modes 'Single Selec-
tion' and 'Multi Selection'. Within the 'Single Selection Mode' only one LED can be switched on
while within the 'Multi Selection Mode' up to four LEDs can be controlled.