LDC500 - Uncategorized SRS - Free user manual and instructions
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| Product Type | Laser Diode Controller |
| Model | LDC500 |
| Brand | SRS (Stanford Research Systems) |
| Dimensions | 8.5 x 3.5 x 12 inches (rackmount) |
| Weight | 5 lbs (2.3 kg) |
| Input Power | 100-240 VAC, 50/60 Hz, 30 VA |
| Laser Current Range | 0 to 500 mA |
| Compliance Voltage | 0 to 10 V |
| Temperature Control | Built-in TEC controller, -20 to +70 °C |
| Modulation | Analog and digital modulation input |
| Display | 2-line alphanumeric LCD |
| Interfaces | GPIB, RS-232, USB |
| Laser Protection | Adjustable current limit, transient protection |
| Operating Temperature | 0 to 40 °C |
| Storage Temperature | -20 to 70 °C |
| Cleaning | Wipe with dry lint-free cloth; avoid solvents |
| Safety Features | Interlock input, keylock, overtemperature shutdown |
| Repairability | Replaceable fuse, modular design for service |
| Included Accessories | Power cord, manual (CD), DB25 cable |
Frequently Asked Questions - LDC500 SRS
How do I set the laser current limit on the LDC500?
Press the LIMIT key, then use the knob to adjust the current limit value. Press ENTER to confirm. The displayed value must not exceed the laser diode's maximum rating.
What is the maximum output current of the LDC500?
The LDC500 can output up to 500 mA with a compliance voltage of up to 10 V. Ensure your laser diode operates within these limits.
How do I connect a laser diode to the LDC500?
Use the DB25 connector on the rear panel. Pin assignments are provided in the manual. Always connect with the device powered off and use a proper adapter for your diode package.
Can I modulate the laser current externally?
Yes, the LDC500 accepts both analog (0-10 V) and digital modulation signals via the modulation input BNC. Set the modulation mode in the setup menu.
How do I clean the LDC500 front panel?
Use a soft, lint-free cloth slightly dampened with water or isopropyl alcohol. Do not use abrasive cleaners or immerse the device in liquid.
What is the purpose of the interlock input?
The interlock input allows an external safety switch to disable laser output when opened. Connect a normally-closed switch between interlock pins; output will be interrupted if the circuit opens.
How do I update the firmware on the LDC500?
Firmware updates are performed via the GPIB or USB interface using proprietary software. Download the latest firmware from the SRS website and follow the update instructions in the manual.
What does the 'Over Temp' error mean?
The 'Over Temp' error indicates that the internal temperature exceeds safe limits. Check that ventilation holes are not blocked and the ambient temperature is within 0-40 °C. The output will automatically shut down until the device cools.
Can I control the LDC500 via computer?
Yes, the LDC500 supports GPIB, RS-232, and USB interfaces. Use the provided command set to program current, temperature, and read status. Drivers for LabVIEW and Python are available.
What should I do if the LDC500 fuse blows?
Replace the fuse with the same type and rating: 1 A, 250 V slow-blow. Ensure the device is unplugged. If the fuse blows again, there may be an internal fault; contact SRS support.
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