Artistic License DMX512, User Manual

Page: 55 / 108

Support@ArtisticLicence.com Fax +44 (0)20 84 26 05 51 55
Output
timing
The following examples show the relationship between Output, Zero
cross for three input values.
DMX512
Base
Address
The BCD inputs are used to set the DMX base address. The inputs
are set up for connection of three standard Binary Coded Decimal
Thumbwheel switches. The BCD inputs are active low, i.e. to select a
base address of 001, connect UNIT1 to ground and pull up all other
BCD inputs. Valid addresses range from 001 to 512.
Test Mode
The BCD inputs are also used to enter test mode.
When Test mode is active, the DMX512 input is disabled.
When the Hundred inputs are set to either ‘6’ or ‘7’ Test mode is
active. The Hundred input sets the intensity, while the Ten and Units
inputs select the channel.
The following examples show the operation:
Hundreds Tens Units Output DMX
Input
0 0 0 All Off Off
0 0 1 Controlled by inputs On
5 1 2 Controlled by inputs On
7 0 1 Output 1 @ 100% Off
6 0 1 Output 1 @ 50% Off
7 0 9 Output 9 @ 100% Off
6 1 2 Output 12 @ 50% Off
DMX512
Input
The DMX512 input connects directly to the output of a standard
RS485 or RS422 receiver such as the 75176.
Good Data
The GOOD signal is driven low to show that valid DMX512 data is
being received. The output is suitable for direct connection (via a
current limit resistor) to the cathode of a 20mA LED.
90% Output
50% Output
10% Output
Zero Cross