A method how to program the DC Level of LED driver with ELMark (2)

 

1. DC level setting

The LED Driver usually 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 the datasheet. The DC level function settings are as follows.

·Behaviour during DC operation: Normal operation or fixed control value (DC output power, EL)

·Light output level in DC operation: programmable 1 - 100% (there is a factory default preset value, adjustable)

Notice

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

   Check the voltage-dependent no load current of Driver (without or defect LED module) for AC input and DC input in the datasheet.

   Check the Emergency Output factor in current (EOF_i) parameter in the datasheet.

 

2. Dimming on DC

In DC input operation, dimming mode also can be activated. If Dimming on DC is activated, the requirements of the DC input recognition function are ignored. In this condition, even if DC input is detected, the LED driver continues to behave as in AC input mode as follows.

·The present dimming level is retained

·An emergency light level defined for the DC input recognition function (DC level) is ignored

·Control signals via DALI continue to be executed

 

If Dimming on DC is activated, then emergency mode is not recognized. The device no longer automatically switches to the emergency light level.

 

3. Program procedure

1) Method 1: Using Tools/Control gear wizard... entrance.

① Click Tools/Control gear wizard... to enter wizard page. 

② Select “DC level” on Control gear wizard tab.

 

③ Tab: “DC level”.

 

Change the DC level percentage and click “Program” to set.

④ Check the commands in DALIMonitor interface.

 

The masterConfigurator software tool programs the DC level via setting DTR0 value at corresponding level in logarithmic dimming curve and sending twice “0x00FF45” eD private commands.

 

2) Method 2: Using Tridonic-specific configuration entrance.

① Right-click the addressed control device under configuration

② Select “Features” tab on Tridonic-specific configuration.

③ Tab: “Features”

 

In the “Behaviour during DC operation” section,

·Using “Fixed control value (0-100%)” to set DC level percentage.

·Using “Normal operation” to enable dimming on DC input.

·Using “save” button to implement setting and save persistent variables.

 

Also checking from the DALIMonitor interface, we know that the DC level value writes in Memory Bank 2 Location 0x03 in logarithmic dimming curve, and dimming on DC is enabled by setting bit3 = 1 in Memory Bank 2 Location 0x05.

 

3) Method 3: Using Tools/Command administrator... entrance and DALI commands

4) Method 4: Using Tools/Command administrator... entrance and Command sequence

A method how to program the DC Level of LED driver with EL Mark (1)

LED Driver for emergency lighting is a crucial component that ensures the proper operation of LED fixtures during power outages or emergencies. LED Drivers are responsible for regulating the electrical current and voltage supplied to the LED light source when powered by DC voltage from batteries. It is important to effection and security, I will explain how to make proper setting here in several steps, welcome to read and commend if any.

In emergency light systems with a central battery supply, the DC input recognition function uses the input voltage to detect if emergency mode is present.

The LED Driver then automatically switches to DC mode and dims the light to the defined DC level. Without DC input recognition, different and more complex solutions would have to be applied in order to detect emergency mode. DC input recognition is integrated in the device as standard function for some LED Drivers. No additional commissioning is necessary for activation.

Caution！

This is a safety-relevant parameter.

The setting is relevant for the capacity of the central battery system.

Notice

   Check the EN 50172, EN 60598-2-22 standard compatibility and EL mark compliant in driver’s datasheet or on product label.

   Check the DC input voltage range in driver’s datasheet or on product label, to make sure that is suitable for the output voltage of the central battery system.

   For some Tunable White drivers, a colour temperature (unit in Kelvin) can be set in addition to the intensity value (%).