Spec Sheet - LT-834

Select Input:	DMX/RDM + DALI Signal (Base)
Select Output:	Triac Leading Edge (Base)
Availability	In Stock
Condition	Brand New

The Ltech LT-834 is a versatile and robust dimming module designed to bridge the gap between advanced digital lighting control systems and conventional phase-cut dimmable fixtures. It expertly converts DMX512, RDM, and DALI signals into a standard leading-edge (Triac) phase dimming output. This makes it an essential component for projects requiring the integration of incandescent lamps, high-voltage halogen lights, or Triac-dimmable LED drivers into a centralized, intelligent lighting network. With a substantial 5A load capacity and universal 100-240Vac input, the LT-834 provides a reliable solution for architectural retrofits, theatrical applications, and high-end commercial or residential installations seeking seamless, flicker-free dimming control from professional consoles or a DALI lighting system.

Key Features

Triple Signal Input

Accepts DMX512/RDM, DALI, and Push DIM signals, offering maximum flexibility for any control environment.

Forward Phase-Cut Output

Provides a leading-edge Triac dimming signal compatible with a wide range of incandescent, halogen, and dimmable LED lights.

High Load Capacity

Handles a maximum load of 5A, supporting up to 500W of incandescent/halogen lamps or 300W of dimmable LEDs.

Universal AC Input

Operates on a wide voltage range of 100-240Vac, making it suitable for installations worldwide.

Intelligent Signal Priority

Automatically prioritizes control signals in the order of DALI, then DMX/RDM, and finally Push DIM for predictable operation.

Built-in Safety Protections

Features automatic overload protection that shuts down the output at ≥102% load and recovers automatically.

Technical Highlights

Compliant with DALI bus standards IEC62386-101, 102, and 207.
RDM (Remote Device Management) enabled for easy discovery and addressing in DMX systems.
Binary DIP switches allow for easy and precise setting of the DMX initial address from 1 to 511.
Full protective plastic housing ensures safety and durability in indoor environments.
Smooth, flicker-free dimming from 0% to 100% across all compatible load types.

Product Specifications

Parameter	Details
Model	LT-834
Dimming Interface	DALI, DMX/RDM, Push DIM
Input Voltage	100~240Vac
Input Frequency	50~60Hz
Output Signal	Leading Edge Phase-Cut (Triac)
Output Current	Max. 5A
Max Load Power (Incandescent)	25-500W
Max Load Power (High-Voltage Halogen)	25-500W
Max Load Power (Dimmable LEDs)	6-300W
Dimming Range	0~100%
Protection	Overload (auto-recovery)
Working Temperature	-30℃~55℃
Dimensions (L×W×H)	175×44×H30 mm
Package Size (L×W×H)	178×48×H33 mm
Gross Weight	140g

AC100 240V 5A DMXDALI Phase cut Dimming Module LT 834 — Wiring diagrams and dimensions for the Ltech LT-834 DMX/DALI to Triac Dimming Module.

Application Scenarios

Architectural Lighting Integration Perfect for upgrading existing buildings by integrating traditional phase-cut dimmable downlights, sconces, and chandeliers into a modern DMX512 or DALI lighting system without replacing all the fixtures.

Theater and Venue Control Allows stage lighting designers to use a DMX console to control house lights, practical lamps on stage, or architectural accent lighting, ensuring all lighting elements are managed from a single system.

Smart Home & Commercial Automation Enables the use of sophisticated DALI or DMX-based control panels and automation systems to manage standard dimmable luminaires in conference rooms, restaurants, retail spaces, and high-end homes.

How to Install & Configure the LT-834 Dimming Module

Step 1: Disconnect Power - Before beginning installation, ensure the main AC power is turned off at the circuit breaker to prevent electrical shock.
Step 2: Wire Connections - Connect the 100-240Vac power to the L (Live) and N (Neutral) input terminals. Connect the lighting load to the Triac dimmer output terminals. Connect your control signal (DMX, DALI, or Push switch) to the appropriate signal input terminals as shown in the datasheet diagrams.
Step 3: Set DMX Address (If Using DMX) - Use the 9-position DIP switch to set the DMX initial address. The address is the sum of the values of the switches in the 'ON' position (1, 2, 4, 8, 16, 32, 64, 128, 256). For RDM mode, ensure all DIP switches are OFF.
Step 4: Test Operation - Once all wiring is secure, restore AC power. Use your DMX console, DALI controller, or push switch to test the dimming functionality. A short press of a push switch toggles on/off, while a long press dims up or down.

⚠ Precautions

This product is for indoor use only.
Ensure the total load does not exceed the maximum rating of 5A.
Only use with luminaires compatible with forward phase-cut (leading-edge/Triac) dimming.
Provide adequate ventilation around the module to prevent overheating.
Please refer to the detailed datasheet in the Downloads section for complete wiring diagrams and DMX address settings.

What's in the Box

✓1 x LT-834 DMX/DALI to Phase-cut Dimming Module
✓1 x User Manual

⇩ Downloads & Documents

PDFAC100-240V 5A DMXDALI - Phase-cut Dimming Module LT-834

Frequently Asked Questions

Q: What is forward phase dimming?

A:Forward phase-cut dimming, also known as leading-edge or Triac dimming, is a common method for dimming incandescent, halogen, and compatible LED lights. The LT-834 is specifically designed for this type of dimming.

Q: Does this module work with reverse phase dimming (ELV)?

A:No, this module is exclusively for forward phase-cut (leading-edge) dimming. It is not compatible with reverse phase-cut (trailing-edge/ELV) dimmers or loads.

Q: Can I use this with any LED bulb?

A:You must use LED bulbs or fixtures that are specifically marked as 'dimmable' and compatible with Triac or leading-edge dimmers. Non-dimmable LEDs will not work and may be damaged.

Q: How do I set the DMX address?

A:The DMX address is set using the 9 DIP switches. Each switch has a binary value (1, 2, 4, 8, etc.). Add the values of all switches in the 'ON' position to get your desired starting address.

Q: What happens if I connect both DALI and DMX signals at the same time?

A:The LT-834 has a built-in signal priority. It will always listen to the DALI signal first. If a DALI signal is present, it will ignore any DMX or Push DIM commands.

Q: What is the difference between this module and a standard DMX decoder?

A:This module outputs a high-voltage AC phase-cut signal to dim line-voltage lights directly. A standard DMX decoder typically outputs a low-voltage PWM signal to control constant voltage LED strip lights.

AC100-240V 5A DMX/DALI - Phase-cut Dimming Module LT-834