Tridonic 87500921 LC 20W 100-1050mA 44V o4a NF SR EXC3 – New Strain Relief Concept

87500921 Common Data

Ordering data LC 20/100-1050/44 o4a NF SR EXC3 87500921 

Technical data

Rated supply voltage 220 – 240 V
AC voltage range 198 – 264 V
DC voltage range 176 – 270 V
Mains frequency 0 / 50 / 60 Hz

Overvoltage protection 320 V AC, 48 h
Typ. rated current (at 230 V, 50 Hz, full load) (1)(2) 112 mA
Typ. current (220 V, 0 Hz, full load, 100 % dimming level) (2) 110 mA
Leakage current (at 230 V, 50 Hz, full load) (1)(2) < 0.7 mA
Typ. input current in no-load operation < 25 mA

In-rush current (peak / duration) 10 A / 80 µs
Max. input power 24.2 W
Typ. power consumption on stand-by (3) < 0.5 W
Typ. input power in no-load operation 0.9 W
Typ. efficiency (at 230 V, 50 Hz, full load) (2) 83.5 %

λ over full operating range (max.) 0.9 C
λ over full operating range (min.) 0.3 C
THD (at 230 V, 50 Hz, full load) (1) < 20 %
Starting time (stand-by) (4) < 0.5 s
Starting time (at 230 V, 50 Hz, full load) (4) < 0.66 s

Starting time (DC mode) (4) < 0.4 s
Switchover time (AC/DC) (5) < 0.4 s
Turn off time (at 230 V, 50 Hz, full load) < 0.2 s
Output current tolerance (1)(6) ± 5 %
Max. output current peak (non-repetitive) (7) ≤ output current + 20 %

Output LF current ripple (< 120 Hz) ± 5 %
Output P_ST_LM (at full load) ≤ 1
Output SVM (at full load) ≤ 0.4
Max. output voltage (U-OUT) 60 V
Dimming range 1 – 100 % (min. 5 mA)

Mains surge capability (between L – N) 1 kV
Mains surge capability (between L/N – PE) 2 kV
Surge voltage at output side (against PE) 3 kV

Standards

EN 55015
EN 61000-3-2
EN 61000-3-3
EN 61000-4-4
EN 61000-4-5
EN 61347-1
EN 61347-2-13
EN 62384
EN 61547
EN 60598-1
EN 62386-101 (DALI-2)
EN 62386-102 (DALI-2)
EN 62386-207 (DALI-2, including part 251, 252, 253)
According to EN 50172 for use in central battery systems
According to EN 60598-2-22 suitable for emergency lighting installations

Thermal details and lifetime

The LED driver is designed for a lifetime stated above under reference conditions and with a failure probability of less than 10 %.

The relation of tc to ta temperature depends also on the luminaire design. If the measured tc temperature is approx. 5 K below tc max., ta temperature should be checked and eventually critical components (e.g. ELCAP) measured. Detailed information on request.

Installation / wiring

Circuit diagram

DALI

switchDIM

87500921 Wiring type and cross section

Mains supply wires

For wiring use stranded wire with ferrules or solid wire from 0.5–2.5 mm2.
Strip 10–11 mm of insulation from the cables to ensure perfect operation of the push terminals.
Use one wire for each terminal connector only.
Use each strain relief channel for one cable only.

Secondary wires (LED module)

For wiring use stranded wire with ferrules or solid wire from 0.5–1.5 mm².
Strip 8.5–9.5 mm of insulation from the cables to ensure perfect operation of the push-wire terminals.
Use one wire for each terminal connector only.
Use each strain relief channel for one cable only.

Wiring guidelines

• Run the secondary lines separately from the mains connections and lines to achieve good EMC performance.
• The max. secondary cable length is 2 m (4 m circuit).
• For good EMC performance, keep the LED wiring as short as possible.
• To comply with the EMC regulations run the secondary wires (LED module) in parallel.

• Secondary switching is not permitted.
• The LED driver has no inverse-polarity protection on the secondary side. Wrong polarity can damage LED modules with no inverse-polarity protection.

• Wrong wiring of the LED driver can lead to malfunction or irreparable damage.
• To avoid damage of the Driver, the wiring must be protected against short circuits to earth (sharp edged metal parts, metal cable clips, louver, etc.)

Replace LED module

1. Mains off
2. Remove LED module
3. Wait for 10 seconds
4. Connect LED module again

Hot plug-in or secondary switching of LEDs is not permitted and may cause a very high current to the LEDs.

Installation note

Max. torque at the clamping screw: 0.5 Nm / M4

Software / Programming / Interfaces

Software / programming

With appropriate software and interface different functions can be activated and various parameters can be configured in the 87500921.
The Driver supports the following software and interfaces:

Software / hardware for configuration:
• companionSUITE (deviceGENERATOR, deviceCONFIGURATOR,
deviceANALYSER)
• masterCONFIGURATOR
Interfaces for data transfer:
• NFC
• Control input DALI
• Control input switchDIM

Nearfield communication (NFC)

The NFC Interface allows wireless communication with the 87500921. This interface offers the option to write configuration and to read configuration, errors and events with the companionSUITE.

A correct communication between the 87500921 and the NFC antenna can only be guaranteed if the antenna is placed directly on the Driver. Any material placed between the 87500921 and the NFC antenna can cause a deterioration of the communication quality. After programming the device via NFC power up the device one time for one second till the deviceANALYSER can read out the parameters. We recommend the use of following NFC antenna: www.tridonic.com/nfc-readers NFC is complied with ISO/IEC 15963 standard. Changing parameters via NFC shall be done by qualified engineers only.

Control input DALI

The control input is non-polar for digital control signals (DALI).
The control signal is not SELV. The control cable has to be installed in accordance to the requirements of low voltage installations.

Digital control with:
• DALI signal: 16 bit

Dimming is realized by amplitude dimming.

Control Input switchDIM

A standard pushbutton (switchDIM) can be wired on the terminals (DA/N and DA/L). Integrated switchDIM function allows a direct connection of a pushbutton for
dimming and switching.

Brief push (< 0.6 s) switches LED driver ON and OFF. The dimm level is saved at power-down and restored at power-up.When the pushbutton is held, LED modules are dimmed. After repush the LED modules are dimmed in the opposite direction.

In installations with LED drivers with different dimming levels or opposite dimming directions (e.g. after a system extension), all LED drivers can be synchronized to 50 % dimming level by a 10 s push. Use of pushbutton with indicator lamp is not permitted.

Functions

LED current

The LED output current must be adapted to the connected LED module. The value is limited by the current range of the respective device.

The priority for current adjustment methods is NFC / DALI (highest priority).
Minimum output current is default.

corridorFUNCTION

A motion detector (corridorFUNCTION) can be wired on the terminals (DA/N and DA/L).

With the corridorFUNCTION and a commercially available motion detector, it is easy to adapt the lighting in one area to its use. That is, when the area is entered by a person, the lighting dims instantly to a certain brightness and is available in desired strength. After the area is left by the person, the brightness dims slowly to a smaller value
or switches off completely. The individual parameters of the desired profile, such as brightness values or delay times, can be adjusted flexibly and individually.

To activate the corridorFUNCTION without using software a voltage of 230V has to be applied at the DA/N and DA/L connection. The unit will then switch automatically to the corridorFUNCTION. corridorFUNCTION is a very simple tool for controlling gears with conventional pushbuttons or motion sensors.

To ensure correct operation a sinusoidal mains voltage with a frequency of 50 Hz or 60 Hz is required at the control input. Special attention must be paid to achieving clear zero crossings.
Serious mains faults may impair the operation of corridorFUNCTION.

Note: By using corridorFUNCTION programming and monitoring via DALI is always possible.

Constant Light Output (CLO)

With this function the light output of the LED module can be kept equal over the lifetime. The light output of an LED module reduces over the course of its lifetime. The Constant Light Output (CLO) function compensates for this natural decline by constantly increasing the output current of the LED driver throughout its lifetime. CLO shall be achieved by limitation of the LED current at the commissioning of the 87500921 and providing a linear interpolation of the current over the time, depending on the data points given by the user.

Light level in DC operation

The 87500921 is designed to operate on DC voltage and pulsed DC voltage. For a reliable operation, make sure that also in DC emergency operation the LED driver is run within the specified conditions as stated in chapter “4.1 operating window”.

Light output level in DC operation is programmable (0; 1 – 100 %). Default value is 100 % (EOFi = 0.95).

The voltage-dependent input current of Driver incl. LED module is depending on the used load.

The voltage-dependent no-load current of Driver (without or defect LED module) is for:
AC: < 25 mA
DC: < 7 mA

Power-up fading

The power-up function offers the opportunity to modify the on behaviour. The time for fading on can be adjusted in a range of 0.2 to 16 seconds. According to this value, the device dims either from 0 % up to the power-on level.

By factory default no fading time is set (= 0 seconds).

Protective features

Short-circuit behaviour

In case of a short-circuit at the LED output the LED output is switched off. After restart of the 87500921 the output will be activated again. The restart can either be done via mains reset or via the DALI interface.

No-load operation

The 87500921 will not be damaged in no-load operation. The output will be deactivated and is therefore free of voltage. When connecting an LED load, restart the device to activate the LED output.

Overload protection

If the maximum load is exceeded by a defined internal limit, the 87500921 turns off the LED output. After restart of the 87500921 the output will be activated again.
The restart can either be done via mains reset or via the DALI interface.

Overtemperature protection

The 87500921 is protected against temporary thermal overheating. If the temperature limit is exceeded the LED driver will switch off. It restarts automatically. The temperature protection is activated above tc max.

The activation temperature differs depending on the LED load. On DC operation this function is deactivated to fulfill emergency requirements.

Insulation

The 87500921 is double insulated.

Miscellaneous

Insulation and electric strength testing of luminaires

Electronic devices can be damaged by high voltage. This has to be considered during the routine testing of the luminaires in production.

According to IEC 60598-1 Annex Q (informative only!) or ENEC 303-Annex A, each luminaire should be submitted to an insulation test with 500V DC for 1 second. This test voltage should be connected between the interconnected phase and neutral terminals and the earth terminal.

The insulation resistance must be at least 2MΩ. As an alternative, IEC 60598-1 Annex Q describes a test of the electrical strength with 1500V AC (or 1.414 x 1500V DC). To avoid damage to the electronic devices this test must not be conducted.

Conditions of use and storage

Humidity: 5 % up to max. 85 %, not condensed (max. 56 days/year at 85 %)

Storage temperature: -40 °C up to max. +80 °C

The devices have to be acclimatised to the specified temperature range (ta) before they can be operated.

The 87500921 is declared as inbuilt LED control gear, meaning it is intended to be used within a luminaire enclosure.

If the product is used outside a luminaire, the installation must provide suitable protection for people and environment (e.g. in illuminated ceilings).

DALI NFC constant current LED drivers are DALI-2 certified devices that deliver a precise, fixed-current output to LEDs while allowing you to program parameters—like output current and dimming curves—wirelessly via Near Field Communication (NFC). They eliminate the need for manual micro-switches and reduce inventory by serving multiple fixture types.

How They Work

Constant Current (CC): These drivers supply a continuous, specific current (e.g., 350mA, 500mA, or 700mA) regardless of the voltage required by the LED string.

DALI & DALI-2: They integrate into smart lighting systems, receiving precise commands to control brightness, groups, and scenes. Many feature DALI DT6 (for single-colour) or DT8 (for tunable white/CCT) control.

NFC Programming: Instead of setting physical dials or dip switches, you hold an NFC-enabled smartphone or a dedicated programming tool near the driver to adjust current (often in 1mA or 0.1mA steps), set fade rates, and configure Constant Lumen Output (CLO).

Key Benefits

High Precision & Low Dimming: Allows ultra-deep, flicker-free dimming down to 0.01% for specialized architectural lighting.

Time-Saving Configuration: Parameters can be copied and pushed to multiple drivers instantly, even while unpowered.

Advanced Diagnostics: Many support D4i and DALI Part 251/252/253 standards, relaying real-time energy consumption, luminaire data, and diagnostic information back to the central DALI controller.

NFC

NFC (Near Field Communication) is a short-range wireless technology that allows devices to exchange data securely with a simple tap or by bringing them within 4 cm of each other. It powers everyday functions like contactless mobile payments (Apple Pay, Google Pay) and public transit ticketing.

Tridonic are a Zumtobel Group company, founded in 1956 in Dornbirn, Austria. For more than 60 years, they have been a driving force in the development of professional lighting solutions.

Today, Tridonic is a world-leading provider of lighting technology for professional applications, including office buildings, and retail outlets, hotels and restaurants, the education industry and outdoor lighting sectors.

In Tridonics’ extensive range of energy-efficient dimmable and non-dimmable LED drivers they offer the right products for every indoor and outdoor application – from cost-efficient LED drivers in proven Tridonic quality to premium products that give you maximum flexibility and convenience.

Tridonics’ dimmable LED drivers can be controlled with different analog and digital dimming signals. Tridonic basicDIM Wireless products allow wireless control without additional wiring.