Technical Application Guide: OSRAM 4DIM NFC G3 CE LED Drivers and T4T-C
This guide provides detailed information on the features, functionalities, and applications of the OSRAM 4DIM NFC G3 CE LED drivers and T4T-C technology.
1 Introduction
This section introduces the OSRAM LED drivers with 4DIM functionality for outdoor and industrial applications, highlighting their long lifetime, low maintenance costs, and high efficiency. It emphasizes the flexibility of the programmable OPTOTRONIC® 4DIM NFC G3 CE LED drivers for optimizing LED luminaire systems. The NFC interface allows for easy and safe programming, saving time compared to DALI-2 interfaces. These drivers are compatible with both OSRAM LED modules and customer-specific LED modules, reducing inventory complexity. The drivers are DALI-2 certified, supporting stepless dimming, status requests, and individual light point addressing, offering enhanced interoperability and data services. The LEDset2 interface standardizes communication between LED drivers and LED modules, ensuring optimal efficiency and adaptability. Integrated overvoltage protection up to 10kV provides robust protection for Class I and II luminaires.
1.1 OSRAM LED drivers with 4DIM functionality for outdoor and industrial applications
These LED drivers are designed for demanding outdoor and industrial applications, prioritizing longevity, reduced maintenance, and high efficiency. The 4DIM functionality enables significant energy savings and a reduction in greenhouse gas emissions through four integrated dimming functions.
1.2 4DIM NFC G3 CE product family
The 4DIM NFC G3 CE product family comprises six different output power classes up to 200W, with ten variants offering higher output voltage ranges for diverse luminaire designs. All models feature 4DIM dimming capabilities and the LEDset2 interface, programmable via Tuner4TRONIC® software using DALI-2 or NFC.
| Product name | OT 20/170-240/1A0 4DIM NFC G3 CE | OT 40/170-240/0A7 4DIM NFC G3 CE | OT 40/170-240/1A0 4DIM NFC G3 CE | OT 75/170-240/0A7 4DIM NFC G3 CE | OT 75/170-240/1A0 4DIM NFC G3 CE | OT 75/170-240/1A5 4DIM NFC G3 CE |
|---|---|---|---|---|---|---|
| General | ||||||
| Maximum power | 22W | 40W | 40W | 75W | 75W | 75W |
| Input voltage L/N | 220-240V | 220-240V | 220-240V | 220-240V | 220-240V | 220-240V |
| Nominal output voltage | 10-38V | 30-77V | 15-56V | 35-115V | 25-75V | 50-150V |
| Output current range | 1050 mA | 700 mA | 1050 mA | 700 mA | 1050 mA | 1500 mA |
| Surge (dif/com) | 6/10kV | 6/10kV | 6/10kV | 6/10kV | 6/10kV | 6/10kV |
| DA-DA Surge | 1 kV | 1kV | 1 kV | 1 kV | 1 kV | 1 kV |
| DALI-PE | 8kV | 8kV | 8kV | 8kV | 8kV | 8kV |
| Insulation (primary/secondary) | SELV | SELV | SELV | Double | SELV | SELV |
| Insulation of casing | Double | Double | Double | Double | Double | Double |
| Stand-by power | < 0.5 W | < 0.5 W | < 0.5 W | < 0.5 W | < 0.5 W | < 0.5 W |
| Product name | OT 110/170-240/0A7 4DIM NFC G3 CE | OT 110/170-240/1A0 4DIM NFC G3 CE | OT 165/170-240/1A0 4DIM NFC G3 CE | OT 200/170-240/1A0 4DIM NFC G3 CE |
|---|---|---|---|---|
| General | ||||
| Maximum power | 110W | 110W | 165W | 200W |
| Input voltage L/N | 220-240V | 220-240V | 220-240V | 220-240V |
| Nominal output voltage | 80-220V | 55-157V | 90-260V | 140-300V |
| Output current range | 700 mA | 1050 mA | 1050 mA | 1500 mA |
| Surge (dif/com) | 6/10kV | 6/10kV | 6/10kV | 6/10kV |
| DA-DA Surge | 1 kV | 1 kV | 1 kV | 1 kV |
| DALI-PE | 8kV | 8kV | 8kV | 8kV |
| Insulation (primary/secondary) | Double | Double | Double | Double |
| Insulation of casing | Double | Double | Double | Double |
| Stand-by power | < 0.5 W | < 0.5 W | < 0.5 W | < 0.5 W |
1.3 Nomenclature
The product name of each OPTOTRONIC® 4DIM CE LED driver is defined as shown below.
Example: OT 40/170-240/1A0 4DIM NFC G3 CE
- OT: OPTOTRONIC® LED driver
- 40: Power class: 40W
- 170-240: Input voltage range (L/N): 170-240V
- 1A0: Max. output current: 1050 mA
- 4DIM: 4DIM functionality (DALI, StepDIM, AstroDIM, MainsDIM)
- NFC: NFC for LED driver programming
- G2: Generation 2
- C: Compact housing shape
- E: For exterior use under specific conditions
1.4 Operating windows
The OPTOTRONIC® 4DIM NFC G3 CE LED driver family is available in six different power classes to suit various applications. The nominal output current ranges from 150-1050 mA (1500 mA for one version). Figure 2 provides an overview of the operating windows for the 4DIM NFC G3 drivers.
Figure 2: Overview of 4DIM NFC G3 CE operating windows
Graph 1: Output voltage vs. Output current for 20W, 40W, 75W models.
Graph 2: Output voltage vs. Output current for 110W, 165W, 200W models.
1.4.1 Current foldback
This feature allows for safe system start-up even if the power consumption or total forward voltage of the LED module exceeds the driver's maximum output power or voltage. The unit reduces current until the maximum output voltage or power is no longer exceeded. If a stable operating point is not achieved, the unit may cycle on/off or switch off completely.
1.4.2 Low input voltage protection
The driver protects itself against damage from high input currents during low input voltage conditions. Figure 4 illustrates the driver's behavior in such scenarios.
Figure 3: Current foldback (example: OT 40 4DIM NFC G3 CE)
A graph showing output voltage against output current, illustrating the current foldback mechanism.
Figure 4: Input voltage vs. output power OT 40 4DIM NFC G3 CE driver
A graph showing output power percentage against mains voltage, indicating different thresholds (A, B, C) for voltage levels.
| A [%] | B [%] | C [%] |
|---|---|---|
| 40 | 40 | 75 |
| 68 | 68 | 85 |
| 70 | 70 | 85 |
| 70 | 70 | 85 |
| 50 | 50 | 75 |
| 50 | 50 | 75 |
2 Features
This section details the various features of the 4DIM NFC G3 CE LED drivers.
2.1 Operating current
Flexible current setting is crucial for modern LED technology. The 4DIM NFC G3 family offers two modes for current setting via Tuner4TRONIC® software: Fixed current and LEDset2.
Figure 5: Setting of the operating current
A screenshot of the Tuner4TRONIC® software showing the 'Current Mode' selection between 'Fixed Current' and 'LEDset2'.
2.1.1 Fixed current mode
In this mode, the minimum and maximum rated output currents are displayed in Tuner4TRONIC®. The output current can be adjusted in the “Operating Current” field.
2.1.2 LEDset2 mode
LEDset2 is a standardized interface for setting the correct output current and enabling temperature protection for LED modules. It supports parallel or series connections of LED modules and is suitable for multi-vendor applications. Without an external resistor, the default current is 700 mA. The driver switches to LEDset2 mode when it detects a resistor value for over 3 seconds within the valid range.
Figure 6: LEDset2 parallel connection
A wiring diagram illustrating the LEDset2 parallel connection for a luminaire.
Figure 7: LEDset2 series connection
A wiring diagram illustrating the LEDset2 series connection for a luminaire.
The output current can be set using an externally connected resistor (min. power rating 50mW, max. tolerance 0.5%), allowing manual adjustment without additional programming. Figure 8 shows the Rset connection.
Figure 8: Rset connection
A wiring diagram showing the connection of the Rset resistor for current setting.
For more accurate current setting, the second LED- terminal can be used, increasing accuracy by approximately 0.5% (Figure 9).
Figure 9: Rset connection with higher accuracy
A wiring diagram illustrating a higher accuracy Rset connection.
Figure 10: LEDset2 coding
A graph showing output current (mA) versus Rset resistance (kΩ), illustrating the LEDset2 coding and highlighting the nominal and undefined ranges.
| lout [mA] reference | Rset [kΩ] [tolerance ≤ 0.5%] | lout [mA] nominal |
|---|---|---|
| Open circuit | > 71 | 70 |
| 150 | 33.3 | 150 |
| 201 | 24.9 | 201 |
| 350 | 14.3 (E192) | 349 |
| 500 | 10.0 (E192) | 500 |
| 700 | 7.14 (E192) | 699 |
| 1050 | 4.75 (E192) | 1050 |
| 1500 | 3.33 | 1502 |
| Undefined | 0.9-2.37 | 1050/70 |
| Short circuit | < 0.9 | 70 |
For further details, consult the LEDset2 application guide available at https://www.inventronics-light.com/application-guides.
2.1.3 Tuning Factor
The Tuning Factor feature allows light planners and luminaire manufacturers to adapt luminaire behavior to specific street lighting requirements, simplifying maintenance. It enables installers to adjust settings based on current needs, such as adjusting lumen output within manufacturer-defined limits.
Figure 11: Tuner4TRONIC® user interface: Tuning Factor
A screenshot of the Tuner4TRONIC® interface showing the Tuning Factor settings, including Maximum limit, Minimum limit, Luminaire reference light output, and Tuning level.
2.2 Thermal derating and protection
2.2.1 External temperature sensor
An external temperature sensor (e.g., NTC resistor) connected to the NTCset port provides temperature protection for the LED module or luminaire. If no sensor is connected and the feature is enabled, the driver operates at 100% light output.
Figure 12: NTC connection
A wiring diagram showing the connection of an NTC sensor to the LED driver.
2.2.2 Thermal management and Driver Guard feature
The 4DIM NFC G3 CE LED driver family includes internal thermal protection. If the maximum LED driver temperature is exceeded, the driver derates the output current to 55%. If the temperature continues to rise, the driver switches off, reactivating at the maximum allowed temperature. The “Driver Guard” feature helps limit the driver's temperature during operation, enhancing luminaire lifetime and reliability. The “Prestart Derating” setting allows for thermal behavior adjustment at lower temperatures.
Table 5: Overview of standard NTCs
| NTC type | Start derating temperature [6.3 kΩ] | End derating temperature 1) [5.0 kΩ] | Shut-off temperature [4.3 kΩ] |
|---|---|---|---|
| 22 kΩ | 56°C | 62 °C | 67 °C |
| 33 kΩ | 66°C | 72 °C | 77 °C |
| 47 kΩ | 75°C | 83°C | 87 °C |
| 68 kΩ | 85°C | 92 °C | 97 °C |
1) Switch-on temperature in case the temperature has reached the shut-off condition.
3 Operating modes
The operating modes of the 4DIM NFC G3 CE LED drivers can be selected using the Tuner4TRONIC® software. Only one mode can be selected at a time.
Figure 19: Operating/dimming modes
A dropdown menu showing various operating modes including StepDIM/AstroDIM/DALI, AstroDIM, MainsDIM, and DALI.
3.1 On/off operating mode
The LED drivers can be used in a simple on/off operating mode. This requires selecting one of the following dimming modes: StepDIM/AstroDIM/DALI (wiring selection), StepDIM (DALI), or DALI, with the respective ports not connected.
Figure 20: Wiring for on/off operation
Wiring diagrams for on/off operation of the LED drivers.
3.2 AstroDIM feature
AstroDIM allows autonomous dimming without an additional control line. The 4DIM NFC G3 CE LED drivers support up to five independent dimming levels and flexible fade time settings. Output levels can be set from 0% (OFF) or between 10% and 100% in 1% steps. Fade times for switch-on and switch-off can be programmed for energy savings during twilight phases.
Two AstroDIM submodes are supported: Time-based and Astro-based.
- Time-based: The dimming profile is referenced to the switch-on time of the LED driver.
- Astro-based: The dimming profile is referenced to the annual average middle of the night, calculated based on theoretical sunrise and sunset times.
The LED driver uses the mains frequency as its internal reference clock. Warning: If the output level is set below the minimum physical dimming level, the minimum dimming current is used, and the software displays the original value. If the output level falls below the minimum allowed dimming current, it is visualized in red.
3.2.1 Wiring and feature activation
AstroDIM can be activated via external wiring (Option 1) or through the Tuner4TRONIC® software (Option 2). For Option 1, a permanent connection between L and the SD(2) port is required. If the SD(2) port is not active during start-up, StepDIM is activated instead.
Figure 21: Wiring: StepDIM/AstroDIM/DALI (wiring selection)
Wiring diagram for StepDIM/AstroDIM/DALI using wiring selection.
Figure 22: Wiring: AstroDIM (DALI) or AstroDIM PD (DALI)
Wiring diagrams for AstroDIM (DALI) or AstroDIM PD (DALI).
3.2.2 Time-based mode
In this mode, the LED driver executes a dimming profile based on the switch-on time. Up to five independent output levels can be set for each step. The minimum dimming period length must be longer than the AstroDIM fade time. The maximum schedule duration is 23 hours and 59 minutes.
Figure 23: Time-based AstroDIM
A screenshot of the Tuner4TRONIC® software interface for configuring Time-based AstroDIM, showing schedule, fade timing, and location settings.
| Parameter | Min. | Max. | Default |
|---|---|---|---|
| AstroDIM fade time | 0.2 s | 8 min | 3 min |
| Switch-on fade time | 0.15 s | 60 min | 0s |
3.2.3 Astro-based mode
This mode adapts the dimming schedule to the length of the night based on daily power-on and power-off times. Tuner4TRONIC® software calculates the annual average middle of the night based on the theoretical sunrise and sunset times for the selected location. Five independent dimming periods can be defined. The dimming profile is performed after the second power-off/on cycle.
Figure 24: Astro-based AstroDIM
A screenshot of the Tuner4TRONIC® software interface for configuring Astro-based AstroDIM.
| Parameter | Min. | Max. | Default |
|---|---|---|---|
| AstroDIM fade time | 0.2 s | 8 min | 3 min |
| Switch-on fade time | 0.15 s | 60 min | 0s |
| Switch-off fade time | OFF, 0s | 60 min | OFF |
Figure 25: Use cases of AstroDIM mode
Illustrations showing different scenarios (Case A, B, C) of AstroDIM mode operation, including the effect of voltage dips and short on-times.
Figure 26: AstroDIM wiring with presence detector
Wiring diagram for AstroDIM with a presence detector connected to the SD(2) port.
Figure 27: Presence detection in AstroDIM mode
A graph illustrating the output level during presence detection in AstroDIM mode, showing the effect of PD signal, start fade time, hold time, and end fade time.
Figure 28: Presence detection configuration
A screenshot of the Tuner4TRONIC® software for configuring presence detection parameters (PD Timing).
3.2.4 Presence detection in AstroDIM mode
In the “AstroDIM PD (DALI)” mode, presence detection via an external sensor connected to the SD(2) port can override the AstroDIM dimming profile. The sensor must meet the electrical characteristics of the SD(2) port.
3.2.5 AstroDIM SD-triggered
In the “AstroDIM SD-triggered” mode, the dimming profile of AstroDIM is activated by an active signal at the SD(2) port. Unlike the standard AstroDIM mode, the dimming profile starts when the trigger signal is received, not necessarily upon power-on. This mode allows the LED driver to be switched on and set to a defined output level until the trigger signal initiates the dimming profile.
Figure 29: AstroDIM wiring StepDIM-triggered
Wiring diagram for AstroDIM StepDIM-triggered mode.
Figure 30: Dimming profile
A graph showing a dimming profile according to a reference schedule, triggered by an SD signal.
4 Additional information
4.1 Insulation
4DIM NFC G3 CE LED drivers feature double/reinforced insulation between primary and secondary sides, and between electronic parts and the casing. Table 12 details the insulation and output voltage (Uout) for different models.
| Insulation (primary/secondary) | OT 20/170-240/1A0 4DIM NFC G3 CE | OT 40/170-240/0A7 4DIM NFC G3 CE | OT 40/170-240/1A0 4DIM NFC G3 CE | OT 75/170-240/0A7 4DIM NFC G3 CE | OT 75/170-240/1A0 4DIM NFC G3 CE | OT 75/170-240/1A5 4DIM NFC G3 CE | OT 110/170-240/0A7 4DIM NFC G3 CE | OT 110/170-240/1A0 4DIM NFC G3 CE | OT 165/170-240/1A0 4DIM NFC G3 CE | OT 200/170-240/1A0 4DIM NFC G3 CE |
|---|---|---|---|---|---|---|---|---|---|---|
| SELV | SELV | SELV | Double | SELV | SELV | Double | Double | Double | Double | |
| Insulation of casing | Double | Double | Double | Double | Double | Double | Double | Double | Double | Double |
| Uout | 60V | 120V | 60V | 185V | 120V | 120V | 250V | 220V | 320V | 370V |
The equipotential pin (EQUI) meets double insulation requirements for the primary side and basic insulation for the secondary side, complying with IEC 60598-1 Annex A.
4.2 Cable preparation
The 4DIM NFC G3 CE LED drivers feature open terminals for easy wiring. The insulation of the cables should be stripped appropriately. Solid and flexible wires can be used.
Figure 41: Cable preparation, primary side
Diagram showing cable preparation for the primary side, indicating wire gauge and stripping length.
Figure 42: Cable preparation, secondary side and equipotential pin
Diagram showing cable preparation for the secondary side and the equipotential pin.
4.3 Incorrect wiring on the output side
The drivers are protected against incorrect wiring on the output side. However, short circuits between LED+ and LEDset or NTCset can damage the driver. Incorrect wiring or output voltage falling below the minimum allowed voltage may cause the driver to shut down and attempt to restart.
4.4 Input overvoltage
The driver can withstand input voltages up to 305 VAC. Shutdown may occur if the supply voltage exceeds 270 VAC. For miswiring, the driver can withstand up to 360 VAC for a maximum of two hours. For overvoltage levels exceeding 264 VAC, an external fuse (400V 4A, time lag, 12t > 160 A2 sec) is recommended.
4.5 Surge protection
The 4DIM NFC G3 CE LED drivers offer up to 10kV common mode protection with integrated overvoltage suppression, minimizing stress on the LED module. The EQUI pin must be connected to the heat sink for Class I and II luminaires to achieve these protection levels. The protection level between L and N or SD(2) and N is 6 kV. For DALI ports and mains input, external surge protection devices (SPDs) should have equal protection levels (Up) to earth. Connecting an SPD only to the DALI port to earth is not permitted.
| Surge between | Test description | Product standard | Basic standard |
|---|---|---|---|
| L-N/SD-L/SD-N | 6 kV at 2 Ω, differential mode | IEC/EN 61547 | IEC 61000-4-5 |
| DA+ - DA- | 1 kV at 2 Ω, differential mode | IEC/EN 61547 | IEC 61000-4-5 |
| L-EQUI/N-EQUI/SD-EQUI | 10 kV at 12 Ω, common mode | IEC/EN 61547 | IEC 61000-4-5 |
| (DA+/DA-) - PE | 8 kV at 12 Ω, common mode | IEC/EN 61547 | IEC 61000-4-5 |
| L-DA/N-DA/SD-DA | 6 kV at 12 Ω, common mode | IEC/EN 61547 | IEC 61000-4-5 |
Figure 43: Protection class I luminaire
Diagram showing the connection for a Class I luminaire, including the EQUI pin connection to the heat sink and PE.
Figure 44: Protection class II luminaire
Diagram showing the connection for a Class II luminaire, including the EQUI pin connection to the heat sink.
5 Programming
The 4DIM NFC G3 CE LED drivers can be programmed using Tuner4TRONIC® via DALI or NFC. Details, user manuals, and application guides are available at https://www.inventronics-light.com/tuner4tronic.
5.1 Programming with DALI magic
Programming with DALI magic requires the LED driver to be powered.
Figure 47: LED driver programming with DALI magic
A diagram illustrating the setup for programming the LED driver with DALI magic using a DALI magic device and a PC.
| Supply voltage | Power | Ambient temperature |
|---|---|---|
| 220-240 VAC | All types | Acc. to LED driver datasheet |
5.2 Programming with NFC USB readers
The LED drivers must not be powered when programming with T4T-Production via NFC. The LED driver should be placed on an NFC reader, aligning the antennas. The NFC logo on the driver indicates the antenna position. For box programming, the NFC logo on the box should be centered over the FEIG Antenna ANT310/310.
5.3 Programming with T4T-Field App
The T4T-Field App allows NFC programming of the 4DIM NFC G3 CE LED drivers via Android and iOS mobile devices. It enables reading driver data, programming from production files, and editing data like light output, CLO, dimming profiles, and luminaire information. Programming can be done with or without mains power, and data access may be restricted by password settings from the luminaire manufacturer.
Figure 52: LED driver programming with NFC
An illustration showing the setup for programming an LED driver using NFC with a PC.
6 Additional information for electrical design-in
6.1 Recommended EMI wiring setup
To meet EMI requirements, the following precautions are recommended:
- Keep LED output wires close together and avoid loop areas.
- Keep wiring lengths as short as possible.
- Keep mains and control wires separated from LED output wires.
- Avoid wiring over the driver housing.
Figure 48: Recommended EMI wiring setup
A diagram illustrating the recommended EMI wiring setup.
6.2 Remote LED driver installation for Class I configuration
Remote mounting of LED drivers is allowed if the additional voltage drop on the output wires is accounted for. For Class I configurations, an EMI filter (Figure 49) can be used for output wires between 2 and 10 meters to comply with EMI requirements.
Figure 49: Connection for Class 1 configuration
Diagram showing the connection for Class I configuration with an EMI filter.
6.3 Remote LED driver installation for Class II configuration
Remote mounting of LED drivers is allowed if the additional voltage drop on the output wires is accounted for. For Class II configurations, an EMI filter (Figure 50) can be used for output wires between 2 and 10 meters to comply with EMI requirements.
Figure 50: Connection for Class 2 with EQUI configuration
Diagram showing the connection for Class II configuration with an EMI filter and EQUI configuration.
Disclaimer: All information in this document has been collected and verified with great care. INVENTRONICS is not responsible for the correctness and completeness of the information, nor for any damages arising from its use. The information reflects the current state of knowledge.
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