1. Introduction
The Skydance DT-D is an AC phase-cut DALI dimmer designed for single-channel output. It complies with DALI standard protocols IEC 62386-102 and IEC 62386-207, ensuring compatibility with other international DALI products. This dimmer is suitable for controlling single-color dimmable LED lamps, traditional incandescent, and halogen lights.
Key features include a numeric display for setting DALI address, dimming mode, curve, and minimum brightness, selectable reverse-phase or forward-phase dimming, and linear or logarithmic dimming curves. It also supports external push switch control for on/off and 0-100% dimming, and features automatic over-heat protection.
Figure 1: Skydance DT-D AC Triac DALI Dimmer (White)
2. Safety Warnings
- Caution: Carefully ensure all wire connections and polarities are correct and secure before applying power. Incorrect wiring can damage the controller.
- DO NOT install the device with power applied.
- DO NOT expose the device to moisture.
- Ensure the total load does not exceed the maximum output power of 360W (1.5A).
- When calculating the maximum number of load lamps or drivers, use the input power or current parameters of a single lamp/driver. The dimmer's output power parameters cannot be used for this calculation.
- The maximum surge current of the dimmer is 65A. The sum of surge current of multiple dimmable LED drivers should not exceed 2 times this value, otherwise the product will be overloaded and damaged.
3. Product Overview
The DT-D dimmer features a compact design suitable for DIN rail mounting. It includes clearly labeled terminals for AC input, AC output, DALI input, and AC Push switch connections. A digital display and setting keys allow for easy configuration.
Figure 2: Angled view of the DT-D Dimmer showing terminals and display.
Figure 3: Side view of the DT-D Dimmer showing the DIN rail mounting clip.
4. Technical Specifications
Figure 4: Overview of features, technical parameters, and mechanical structures.
Input and Output
| Parameter | Value |
|---|---|
| Input Voltage | 100-240VAC |
| Output Voltage | 100-240VAC |
| Output Current | Max 1.5A |
| Output Power | 150-360W |
Dimming Data
| Parameter | Value |
|---|---|
| Input Signal | DALI, AC Push |
| Dimming Curve | Linear / Logarithmic |
| Dimming Level | 256 levels |
| Dimming Range | 0-100% |
Environment
| Parameter | Value |
|---|---|
| Operation Temperature | Tc: -20°C ~ +55°C |
| Case Temperature (Max.) | Tc: +85°C |
| IP Rating | IP20 |
Safety and EMC
| Parameter | Standard |
|---|---|
| EMC Standard (EMC) | ETSI EN 301 489-1 V2.2.3, ETSI EN 301 489-17 V3.2.4 |
| Safety Standard | EN 62368-1:2020+A11:2020 |
| Certification | CE, EMC, DALI-2 |
Package
| Parameter | Value |
|---|---|
| Size | L120 x W78 x H55mm |
| Gross Weight | 0.132kg |
5. Mechanical Structures and Installations
The DT-D dimmer is designed for DIN rail mounting. Ensure proper clearance for wiring and heat dissipation.
Figure 5: Mechanical structure and dimensions. DIN Rail Mounting Size: TS-35/7.5 or TS-35/15.
Connection Points:
- DALI Input: Two groups of DALI signal input. The DALI bus does not require distinguishing plus/minus polarity.
- AC L Input: Live AC input.
- AC N Input: Neutral AC input.
- AC L Output: Live AC output to load.
- AC N Output: Neutral AC output to load.
- AC Push Switch: Terminals for connecting an external momentary push switch.
6. Wiring Diagrams
Always ensure power is disconnected before performing any wiring. Refer to the diagrams below for correct connections.
Figure 6: Wiring diagrams for Dimmable LED Light (left) and Triac Dimmable LED Driver (right).
Wiring for Dimmable LED Light (Left Diagram):
- Connect DALI Bus Power Supply to the DALI Master and the DALI Input terminals of the dimmer.
- Connect AC100-240V Input (L and N) to the dimmer's AC Input terminals.
- Connect the Dimmable LED light to the dimmer's AC Output terminals (L and N).
- Connect a Push switch to the A1 and A2 terminals for local control.
Wiring for Triac Dimmable LED Driver (Right Diagram):
- Connect DALI Bus Power Supply to the DALI Master and the DALI Input terminals of the dimmer.
- Connect AC100-240V Input (L and N) to the dimmer's AC Input terminals.
- Connect the Triac Dimmable LED Driver to the dimmer's AC Output terminals (L and N). The LED light then connects to the LED Driver.
- Connect a Push switch to the A1 and A2 terminals for local control.
7. Operation
7.1. Set DALI Address via Buttons
- Long press the M key and either the ▲ or ▼ key for 2 seconds to enter DALI address setting mode. The digital display will start flashing.
- Short press ▲ or ▼ key to set the DALI address. The address can be set from 00 to 63.
- If no DALI address is assigned, the digital display will show "AFF".
- Short press the M key, or wait for 10 seconds (timeout), to exit DALI address setting. The digital display will stop flashing.
7.2. DALI Address Assigned by DALI Masters
The DALI address can also be assigned automatically by a DALI Master controller. Refer to the user manual of your specific DALI Master for details. When the DALI master is assigning an address, the digital display will show "AAU". Once assigned, it will show the start DALI address "Axx", where xx is from 00 to 63.
7.3. Reverse-phase or Forward-phase Dimming Setting
- Long press the M key for 2 seconds to enter dimming phase setting mode. The digital display will start flashing.
- Short press ▲ or ▼ key to switch between reverse-phase dimming ("C-F") or forward-phase dimming ("C-R").
- Short press the M key, or wait for 10 seconds (timeout), to exit dimming phase setting.
7.4. Minimum Brightness Setting
- Long press the M key and either the ▲ or ▼ key for 2 seconds to enter minimum brightness setting mode. The digital display will start flashing.
- Short press ▲ or ▼ key to set the minimum brightness (00%~40%~FF%). Factory default is 20%.
- If the minimum brightness set by the DALI master exceeds 40%, the display will show "LFF".
- Short press the M key, or wait for 10 seconds (timeout), to exit minimum brightness setting.
7.5. Dimming Curve Setting
- Long press the M key and either the ▲ or ▼ key for 2 seconds to enter dimming curve setting mode. The digital display will start flashing.
- Short press ▲ or ▼ key to switch between linear dimming ("C-L") or logarithmic dimming ("C-E").
- Short press the M key, or wait for 10 seconds (timeout), to exit dimming curve setting.
7.6. Restore Factory Default Parameter
Long press both ▲ and ▼ keys for 2 seconds to restore factory default parameters. The digital display will show "RES". Default settings are: unassigned DALI address ("AFF"), linear dimming curve, reverse-phase control, and 20% minimum brightness.
7.7. Push-Dim Function
The Push-Dim interface allows for simple dimming using commercially available non-latching (momentary) wall switches.
- Short press: Turns the light on or off.
- Long press (1-6s): Press and hold for stepless dimming. With every other long press, the light level moves in the opposite direction.
- Dimming memory: Light returns to the previous dimming level when switched off and on again, even after power failure.
- Synchronization: If multiple controllers are connected to the same push switch, a long press for more than 10 seconds will synchronize the system, and all lights in the group will dim up to 100%. This eliminates the need for additional synchrony wires in larger installations. It is recommended not to exceed 25 controllers per push switch, and the maximum length of wires from the push switch to the controller should not exceed 20 meters.
8. Compatible Load Types
| Load Type | Maximum Load | Remarks |
|---|---|---|
| Dimmable LED lamps | 200W @ 220V 100W @ 110V | Due to variety of LED lamp designs, maximum number of LED lamps is further dependent on power factor result when connected to dimmer. |
| Triac Dimmable LED drivers | 200W @ 220V 100W @ 110V | Maximum permitted number of drivers is 200W divided by driver nameplate power rating, and make sure the surge current is no more than 2 times 65A. |
| Incandescent lighting, HV Halogen lamps | 400W @ 220V 200W @ 110V |
9. Maintenance
The Skydance DT-D dimmer requires minimal maintenance. Keep the device clean and free from dust. Do not use abrasive cleaners or solvents. Ensure proper ventilation around the unit to prevent overheating. If any issues arise, refer to the troubleshooting section or contact support.
10. Troubleshooting
- No Light Output: Check all wiring connections, ensure power supply is active, and verify the load is compatible and within the specified power range. Check DALI address settings.
- Flickering Lights: Ensure the load is compatible with phase-cut dimming. Check for stable power supply. Verify minimum brightness settings are not too low for the connected lamps.
- Dimmer Not Responding: Check DALI bus connection and power. Verify DALI master is functioning correctly. If using a push switch, ensure it is correctly wired and functional.
- Over-heat Protection: If the unit overheats, it will automatically recover. Ensure adequate ventilation and that the load does not exceed specifications.
11. Warranty and Support
The Skydance DT-D dimmer comes with a 5-year warranty against manufacturing defects. For technical support or warranty claims, please contact your retailer or the manufacturer directly. Ensure you have your purchase details and model number available.