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Fastest Switching Speeds
High Peak Currents
Analog/Digital Modes
Programmable Parameters

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CX4000B Laser Shutter Controller Specifications

Power Requirements 24 ± 0.5 VDC, 3 A rated
Control Signal Requirements 3 – 24 VDC Square Wave
Soft-Open (Regulated) Current Ramp Up 0-50 ms
Boost Pulse Time (Full Current Open) 0-200 ms
Peak Boost Current (short bursts from on-board surge capacitor) 10 A
Hold Open Current (Regulated) 0 – 5 A
Delay Time (Damping Function) 0-50 ms
Brake Pulse Time (Close Damping) 0-50 ms
Connections (All) 2-pin screw terminals
Identification Model/Calibration Labels
Compliance RoHS, IPC-A-610 Class 2

CX4000B Shutter Controller Waveform


CX4000B Laser Shutter Controller Electrical Drive

Power–Up Considerations: The user’s power supply should be able to surge current into the CX4000B surge capacitor. In operation, the surge current needed to drive the laser shutter load comes from the CX4000B capacitor. If the available power supply is of minimal current rating, shutter maximum speeds may not be achievable.

Connections and Operational Procedure: See mechanical drawing for mounting hole location and spacing, and connection polarities.

  1. Mount PCB with minimum 0.25-inch standoffs on board bottom. Keep standoff, washer, and screw head diameters within limits to avoid contacting traces on board.
  2. Connect 24 VDC Power source to power terminals. Built-in fusing is on board.
  3. Attach signal source to control signal input header.
  4. Attach shutter wires to Output header. Make sure shutter is thermally mounted!
  5. Turn on power to DC Power source, apply the input/control signal, shutter will begin to operate at the frequency set by the control signal (not exceeding the shutter rating)

Electrical Drive

Intended Use: Where switching performance is critical, especially on larger aperture and high-speed laser shutters, the CX4000B provides performance parameters difficult to achieve on user-built circuits. It can drive all safety/process laser shutters and all modulation laser shutters.

Calibration: Unit is factory programmed via microcontroller and/or trim pots for use with each corresponding laser shutter model, and in the case of large optic shutters, calibrated additionally for gravity orientation effects. Label on product denotes mating laser shutter model.

Shutter Compatibility: All our laser shutters can be driven with the CX4000B. In higher performance shutters, the ultimate performance, switching speeds, and repetition rates are typically achievable only with the CX4000B through careful waveform development and calibration.

OEM Integration Considerations:

Electrical Safety: The 24 VDC standard power input makes for simple electrical safety certification in integrated systems.

Control Signal & Connections: The input control signal is typically TTL, or up to 24 VDC. Positive polarity opens the shutter. Polarity markings are shown on mechanical drawing and PCB silkscreen labeling. The input is resistive, at about 2.4 KΩ through an opto-isolator LED with a 1 V drop. Your signal source must be able to source the required current, typically less than 2 mA at TTL voltages, or up to 10 mA from a 24 V PLC.

Output Power and Connections: The laser shutter controller outputs an inductive load waveform optimized to each shutter model. In general, 24 V is applied to the load for a preset time, then the controller will use PWM to lower the voltage to a long-term hold level. The CX4000B has the added benefit of regulating the hold current, allowing for optimal performance throughout the shutter’s rated operating temperature range. The shutter inductor is not part of the PWM switching circuit, only an inductive load, reducing switching noise.


The CX4000B laser shutter controller is a PCB level driver powered by DC source that delivers a custom power waveform to the inductive shutter load. This controller is designed to provide high-speed, high-power waveforms suitable for driving even our most demanding shutters. Key features include motion dampening via 5 parameters of magnetic force management (soft-open current ramp, energized open boost, regulated hold current, and delay/brake close damping function), reverse polarity protection (hot swap) on power and control terminals, control signal opto-isolated for noise isolation. All components used in the controller are RoHS (lead free) Compliant. Read more about our Shutter Electronic Controller Technology here.