Doug Fleenor DMX512 Dual Isolation Amp w/ Junction Box 4Uni. 4 In/4Out
Details
For the receiving end of long control runs, Doug Fleenor recommends the DMX512 Isolation Amplifier. It contains separate input and output power supplies. This allows the input circuitry to receive signals as low as 0.2V. These are optionally available in any number of configurations for systems with more than one DMX512 universe. Input and output circuitry and specifications are identical to that of our standard splitters.
The model 121Q has four isolators ideally suited for use with control consoles, which have multiple DMX outputs. Includes junction box mounting option.
Specifications:
Input Circuit:
- EIA-485 receiver with 120 ohm termination resistor between +Data and -Data (Units with optional feed through connectors do not have internal termination)
Input Signal:
- 0.2V minimum, 12V maximum
Output Circuit:
- EIA-485 driver
Connectors:
- Gold plated 5-pin Neutrik D-1 Series
Feed Through:
- A non-isolated feed through connector is optional
Isolation:
- 2500V optical coupler, 1500V split bobbin transformer
Power Input:
- 100V - 120V, 50/60 Hz, 12W (208V - 240V optional)
Color:
- Top, bottom, and sides: Silver hammer tone
- Front and back: Black
Size (D x H x W):
- 6.5" x 1.7" x 8.25"
123-data (2).pdf
123-man (2).pdf
123-dwg (2).pdf
Doug Fleenor DMX512 Dual Isolation Amp w/ Junction Box 4Uni. 4 In/4Out (Doug Fleenor 121Q-JBOX) 
Customer service via phone call was excellent and ordering products online was very easy.
No complaints
Found a hard to find part and it was still affordable. The payment process was a bit of a problem, the system either wasn't working properly or it needs a bit of clarification on the instructions. I did get it paid for and the delivery was fast. Overall satisfied with this purchase.