DMX512 TO 0-10 VOLT ANALOG CONVERTER OWNERS MANUAL Doug Fleenor Design 396 Corbett Canyon Road Arroyo Grande, CA 93420 (805) 481-9599 revision 2.
PRODUCT DESCRIPTION The DMX512 to Analog Converter is an interface device which allows a DMX512 control console to control 0 - 10 volt analog dimmers or other 0 - 10 volt devices. The input to the converter is electrically isolated from the outputs. This prevents ground loops in the dimming control system as well as protecting the console from damage in the event of dimmer failure.
SETUP AND CONNECTIONS The DMX512 to Analog Converter is generally placed at the dimmer end of the control cable. This way the control cable needs only three conductors. In retrofitting an existing installation where the analog control cables are already in place, it may be easier to place the Converter at the console end. The control cable to the Converter should be designed for data communication.
The pin outs for the DB-25 connector are: pins 1 - 24: pin 25: connector 1: channels 1 - 24 output common connector 2: connector 3: connector 4: channels 25 - 48 channels 49 - 72 channels 73 - 96 output common output common output common OPERATION The only user adjustment required is the setting of the front panel "starting address" switch. This three digit push-wheel switch reads the number of the DMX channel which will control the first analog output.
Remove the four screws that secure the top panel and remove the panel. The jumper is labeled "REMOVE JUMPER TO BLACK-OUT ON LOSS OF SIGNAL" Remove the jumper. Replace the top panel and secure with the four screws. TEST MODE The DMX512 to Analog Converter has a built in test mode which allows the outputs to be brought up to full without any DMX512 input. To bring up a particular channel set the starting address switch for 6XX where XX is the channel to be brought to full.
(an AD558). The micro-controller sequentially applies the levels for each output to the Digital to Analog chip (abbreviated D/A) while switching the output of the D/A to the 24 output buffers. The switching circuit (three 4051 chips) allow one D/A to service all outputs with less than 1/250 second delay between the time a DMX level changes and the analog output is updated. Capacitors hold the 0 - 10 volt level while the other outputs are being updated.
