Gilderfluke&Co DMX-512 Input DC Dimmer - Manual (Page 5)

Lg-DMX/DC Overview
The Lg-DMX/DC can be used to control any low voltage Direct Current (DC) load from a DMX-512 se-
rial control signal. The DMX-512 can come from a Br-Brain4, Br-ANA, Br-miniBrick8, Sd-50/8, Sd-50/8 or
any other Gilderfluke & Company card which transmits animation and lighting data through DMX-512. The
DMX-512 can also come from any other source of DMX-512, including just about every lighting control
board.
DMX-512 is a serial data protocol that has been defined by the USITT for control of dimmers, moving
lights, strobes, smoke machines, fans and other theatrical devices. It is the standard that Gilderfluke &
Company uses for transmitting data between most of the devices we make. DMX-512 consists of a 250
KBaud asynchronous data stream transmitted over a twisted pair of wires using RS-422 or RS-485 signal
levels. The format of the data has been defined by the USITT.
The Lg-DMX/DC can be used to control not just incandescent lamps. Any low voltage device that can
be run from 9 to 24 VDC and draws between zero and ten amps can be controlled. These include large
arrays of LEDs and DC motors. Diodes built into each output will clamp any flyback voltage spikes created
when controlling inductive loads.
AC power supplies can be used with the addition of a bridge rectifier, external to the Lg-DMX/DC.
Features of the Lg-DMX/DC include:
• Eight pulse width modulated high current outputs that can be dimmed between 0 to 100% in 256 even steps.
• Ten amps capacity on each output.
• Unique design that doesn’t use a microprocessor of any kind. With no microprocessor, it can not crash.
• Does not require any heat sink or additional cooling in most applications.
• Accepts industry-standard DMX-512.
• Outputs are distributed across four ‘phases’ to distribute the power supply load.
• If powered up, the Lg-DMX/DC regenerates and retransmits DMX-512. If not attached to a power supply, di-
rectly connects the DMX-512 inputs to the outputs so it will not affect the DMX-512 daisy chain.
• Outputs can be addressed to any DMX-512 address between 1 and 512 (0 to 511 if using zero-based ad-
dressing).
• Each output is protected from over current conditions by a ‘circuit breaker’.
• ‘Test’ button allows you to disable outputs, or turn on outputs, even without a DMX-512 signal.
• Output update rates adjustable from 61 Hz to 15.6 KHz.
• Can be set to turn off all outputs upon loss of the DMX-512 input, or hold the outputs at the last levels re-
ceived.
• Each of the eight outputs is rated for a continuous load of ten amps. This is enough to drive a 60 watt incan-
descent lamp at 12 VDC, or a 125 watt incandescent lamp at 24 VDC.
• Removable spring block terminal inputs and outputs.
• The Lg-DMX/DC runs on anything from 9-24 VDC. Lg-DMX/DCs can even be run from batteries.
• Measures just 5” x 2.75”. Lg-DMX/DCs mount in standard Augat 2.75” ‘Snap Track’, or on screw standoffs
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-50/xx Manual / September 10, 2012 9:58 AM / page 5 of 12