1U Rack‑Mount 3‑In 8‑Out DMX Merger,HTP‑Backup Mode for Critical Stage Lighting

Professional DMX Merger‑Distributor,Super‑Drive Output,LED Indicators for Theatre Shows

This 1u rack mount 3 input 8 output dmx merger with backup mode is 19‑inch 1U rack‑mount DMX‑512 signal‑processing hardware built for theatre productions, large‑scale live‑concert tours, TV broadcast‑recording and mission‑critical rental‑event deployments across Europe and North America. This multi‑functional signal unit combines two core capabilities: multi‑source DMX signal merging and triple‑path automatic backup fail‑over, perfectly suited for projects that demand high‑availability lighting control from multiple consoles.

Following DMX512/1990 industry standard, the hardware is equipped with three DMX input ports and eight DMX output ports. Working modes are selected by front‑panel DIP‑switches. Under HTP merging mode, the unit compares channel values coming from three input sources and outputs the highest value to all eight output ports. Under backup fail‑over mode, Input A serves as primary source; once Input A signal drops, Input B takes over output instantly. If both Input A and Input B lose signal, Input C will automatically take over to maintain continuous lighting signal.

Every signal path keeps fully independent routing. All input‑output ports are protected against in‑rush current and voltage surges to resist transient electrical interference from complex venue power grids. Each of the eight DMX output ports features super‑drive capability, compensating signal attenuation caused by long DMX cable runs. Dedicated LED indicators are assigned for each input and each output port, allowing field technicians to rapidly judge signal presence status without extra measuring instruments.

Compact 1U‑height mechanical form factor fits standard 19‑inch equipment racks. Wide‑range AC88‑256V 50‑60Hz power input adapts to diverse mains‑grid specifications throughout European nations and United States. This hardware meets CE, UL and GB 7000.15‑2000 safety‑related standards. Physical dimension measures 482 mm × 173 mm × 46 mm and net weight reaches 1.75 kilograms.

This indoor‑only rack‑mount device should be kept dry and far away from strong magnetic‑field disturbance. Operators shall complete DIP‑switch mode configuration before power‑on, and follow standard DMX wiring rules with terminators fitted at the end of signal daisy‑chain. Integrating HTP signal‑merge and triple‑source auto‑backup functions, this DMX merger provides stable high‑availability signal‑processing solution for mission‑critical entertainment‑lighting projects throughout Europe and North America.

DMX 512/1990 Standard
3 DMX inputs and 8 DMX outputs
There are two modes of the Merger to control：
HTP mode and Backup mode
HTP: the highest value of 3 identical channels from 3 DMX-signals will have priority
Backup: when input A DMX- signal fail, input
B DMX-signal take over immediately. When both input A & B DMX- signal fail, input C
DMX-signal take over immediately
Independent input and output signal
Input and output ports use Inrush Protection
Each DMX output has super driving ability. Each input and output has LED indicator
Wide input stable electric power supply, suitable for voltage input of different countries
Dimension: 482mm ×173mm × 46mm
Net Weight: 1.75Kg
Input Voltage: AC88-256V 50/60Hz
Up to CE standard, UL standard and GB 7000.15-2000 standard

Q1: How many DMX input and output ports does this signal merger provide?

A1: It has three DMX signal input ports and eight independent DMX signal output ports.

Q2: What is the working principle of HTP merging mode?

A2: HTP selects and transmits the highest channel value among three incoming DMX sources.

Q3: How does the triple‑source backup fail‑over sequence operate?

A3: If Input A fails, Input B takes over instantly;if A&B both fail, Input C will take over.

Q4: What circuit‑level protection is equipped for signal input‑output ports?

A4: All ports adopt in‑rush surge‑protection, and every path keeps independent signal routing.

Q5: What performance advantage do the eight DMX output ports have?

A5: Each DMX output is built‑in with super‑drive capability for long‑distance cable transmission.

Q6: What feedback information do the panel LED indicators offer technicians?

A6: Separate LEDs display real‑time signal activity for every input port and every output port.

Q7: How to switch between HTP merging mode and backup fail‑over mode?

A7: Operate front‑panel DIP‑switches to select target working mode before power‑on.

Q8: Power‑supply, dimension, weight and certification specifications?

A8: AC88‑256V 50‑60Hz;482×173×46mm;net weight1.75kg;CE‑UL certified.