Quantum Composers LDDC 1550 - Manual (Page 4)

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1 Introduction
The Quantum Composers Laser Diode Driver Controller (LDDC) and Laser System Controller
(LSC) provide a means of controlling various types of laser diode driver supplies. It allows the
ability to easily control current levels, pulse modes, and interlock controls as well as monitor
voltage and current levels from the driver. The LDDC/LSC provides an easy user interface for
manual control and readout as well as USB connectivity for remote computer control. The LSC
unit offers additional features such as q-switch triggering, external triggering, sync output, and
additional I/O signals.
2 Setup
The LDDC/LSC can easily be connected to a laser diode driver. In most cases a simple cable is
all that is required to interface with the driver and provide power to the unit. If the equipment is
used in a manner not specified by the manufacturer, the protection provided by the equipment
may be impaired.
Figure 1 (LDDC Connections)
Figure 2 (LSC Connections)
Power
The LDDC/LSC requires a 15-24VDC (200mA) power supply to operate. The included wall
adapter can be used to power the unit. The power adapter should be plugged into the rear panel
of the unit that is labeled 15VDC. If a different power source is used, the required mating
connector is a standard, circular female plug with the following dimensions: 5.5mm x 2.1 mm x
12mm (outer diameter x inner diameter x connector length). A power switch on the rear of the
unit will turn on the controller. The controller can also be powered directly from some driver
supplies that have an auxiliary DC output of at least 15V @ 200mA on pins 13 or 14 of the
interface connector. Please refer to the operator’s manual of the laser driver supply to verify if an
auxiliary supply pin is available. Power can be applied by both the wall adapter and the driver
supply since the supplies will be internally protected. If the 15VDC power is derived from the