1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the OSRAM OPTOTRONIC FIT D LT2 L 75/220-240/550 D LT2 L LED Driver Transformer. This constant current LED power supply is designed for professional use in various lighting applications.
Please read this manual thoroughly before installation and keep it for future reference.
2. Safety Instructions
- Electrical Safety: Installation and maintenance must be performed by qualified personnel only. Ensure the power supply is disconnected before any work is performed on the device or connected luminaires.
- Voltage: Verify that the input voltage matches the specifications of the driver (220-240V AC).
- Grounding: Connect the protective earth (PE) to the designated terminal or case as indicated on the product label.
- Overload Protection: Do not exceed the rated output power (75W) or current (550mA) to prevent damage to the driver and connected LEDs.
- Temperature: Ensure adequate ventilation to maintain the operating temperature within the specified range (-25°C to +50°C ambient, max Tc 75°C).
- Environment: This device is intended for indoor use in dry environments unless otherwise specified for the luminaire it powers.
3. Product Overview and Components
The OSRAM OPTOTRONIC FIT D LT2 L is a constant current LED power supply. It features robust construction and clearly marked connection terminals.
Figure 1: OSRAM OPTOTRONIC FIT D LT2 L LED Driver Transformer. This image shows the top view of the LED driver, highlighting its compact form factor and the label with electrical specifications and connection diagrams.
Key Features:
- Constant current output for stable LED operation.
- Wide output voltage range (54-216V) for various LED configurations.
- High power factor (0.99) for energy efficiency.
- Designed and engineered in Germany, manufactured in Bulgaria.
Connection Terminals (refer to product label):
- Input (AC 220-240V): Terminals 1, 2, 3, 4 (typically 1 and 2 for live/neutral, 3 and 4 for PE/ground).
- Output (DC): LED+ (21), LED- (27).
- Auxiliary/Control: Terminals 22, 23 (O), LEDset (24), LED-aux (25), + (26). These may be used for dimming or other control functions depending on the specific luminaire and system.
4. Installation and Setup
Before beginning installation, ensure all power is disconnected at the main circuit breaker.
- Mounting: Securely mount the LED driver in a suitable enclosure or fixture, ensuring proper ventilation and adherence to local electrical codes. The operating temperature (Tc) should not exceed 75°C on the designated point.
- Wire Preparation: For input and output connections, use wires with a cross-section of 0.5-1.5 mm² for solid conductors or 0.75-1.5 mm² for fine-stranded conductors. The push-in terminals require no tools for insertion once the wire is stripped to the appropriate length (typically 8-9mm).
- Input Connection: Connect the AC mains supply (220-240V, 50/60Hz) to the input terminals (1, 2). Connect the protective earth (PE) to terminal 4 or the metal case of the driver.
- Output Connection: Connect the LED module(s) to the output terminals: LED+ to the positive terminal of the LED module, and LED- to the negative terminal. Ensure the total voltage drop across the LED string is within the driver's output voltage range (54-216V).
- Control Connections (Optional): If using dimming or auxiliary functions (e.g., LEDset, LED-aux), connect the appropriate control wires to terminals 22, 23, 24, 25, 26 as per the luminaire's specifications.
- Final Check: Double-check all connections for correctness and security before restoring power.
5. Operation
Once properly installed and connected, the OSRAM OPTOTRONIC FIT D LT2 L LED Driver Transformer operates automatically upon receiving input power.
- The driver provides a constant current output (125-550mA) to the connected LED load, ensuring stable illumination.
- If dimming or other control features are connected, the LED output will respond according to the control signal.
- The driver is designed for continuous operation within its specified temperature and load limits.
6. Maintenance
The OSRAM OPTOTRONIC FIT D LT2 L LED Driver Transformer is designed for long-term, maintenance-free operation under normal conditions.
- Cleaning: Periodically inspect the driver and its surroundings for dust and debris. Clean with a dry, soft cloth if necessary. Do not use liquid cleaners.
- Inspection: Annually, or as required by local regulations, inspect wiring for signs of wear, damage, or loose connections.
- Ventilation: Ensure that ventilation openings (if any) are not obstructed and that the ambient temperature around the driver remains within specified limits.
- Repairs: Do not attempt to open or repair the driver. There are no user-serviceable parts inside. Any unauthorized opening will void the warranty.
7. Troubleshooting
If the LED driver or connected LEDs are not functioning as expected, consider the following common issues:
| Problem | Possible Cause | Solution |
|---|---|---|
| LEDs do not light up. | No input power; incorrect wiring; faulty LED module; driver failure. | Check power supply; verify all connections (input/output); test LED module; replace driver if necessary. |
| LEDs flicker or dim unexpectedly. | Unstable input voltage; incorrect dimming signal; overloaded driver; poor connections. | Ensure stable power; check dimming controller/wiring; verify LED load is within specifications; secure connections. |
| Driver is hot to the touch. | Insufficient ventilation; ambient temperature too high; overloaded driver. | Improve airflow around driver; reduce ambient temperature; ensure LED load is within driver's rated power. |
If the problem persists after attempting these solutions, contact a qualified electrician or OSRAM technical support.
8. Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | OT FIT 75/220-240/550 D LT2 L |
| Manufacturer | Ledvance |
| Part Number | ZMP_4055446 |
| Input Voltage | 220-240 V AC, 0/50/60 Hz |
| Input Current (IN) | 0.35 A |
| Rated Power (Prated) | 75 W |
| Output Current (Irated) | 125-550 mA (Constant Current) |
| Output Voltage (Urated) | 54-216 V DC |
| Max Output Voltage (U-OUT) | 250 V DC (No Load) |
| Power Factor (λ) | 0.99 |
| Ambient Temperature (ta) | -25°C to +50°C |
| Max Case Temperature (Tc) | 75°C |
| Material | Metal |
| Item Weight | 203 g |
| ASIN | B07N6JBKXT |
| First Available Date | 27 February 2019 |
9. Warranty and Support
This OSRAM product is manufactured by Ledvance and is subject to the standard warranty terms and conditions provided by Ledvance. Please refer to the official Ledvance website or your point of purchase for detailed warranty information.
For technical support, product inquiries, or warranty claims, please contact Ledvance customer service or your local OSRAM/Ledvance distributor. Keep your purchase receipt and product model information handy when contacting support.
Manufacturer: Ledvance
Website: www.osram.com (as indicated on product label)
