Doug Fleenor Design DMXDECELERATOR - Manual

DOUG FLEENOR DESIGN, Inc.
Model DMX DECELERATOR
Operations Manual
Product description
The DMX DECELERATOR is a DMX512 isolator and re-timing device. It can receive
any signal within the DMX512 specification and it can accept some signals outside of
the specification. The DMX DECELERATOR produces a DMX output signal with
“relaxed” timing characteristics which are required by some DMX receiving devices.
Environmental
Operating temperature: 0-40º C
Operating humidity: 10-90% non-condensing
Indoor use only
Electrical ratings
Input: 100 - 240 VAC, 50 - 60Hz, 0.5A
Control cable
Standard 5 pin XLR cables should be used to connect DMX512 signals to the
connectors on the back panel of the DMX DECELERATOR. A male input is provided
and a female output is provided. The input is internally terminated.
Pins 4, and 5 of the 5 pin XLR connectors are not used by the DMX DECELERATOR.
They are not connected internally.
Setting the speed switch
The front panel speed switch is used to select the timing characteristics of the output
signal regardless of the characteristics of the incoming signal. The SLOW and FAST
settings have timing characteristics as shown below.
Switch setting Break time MAB time Inter-byte time Update rate
SLOW 284 µs 116 µs 52 µs 20 Hz
FAST 202 µs 36 µs 4 µs 40 Hz
Strand * 228 µs 33 µs 4 µs 31 Hz
* Strand timing is set using an internal jumper. See jumper settings below. Strand
timing adds an extra 7 millisecond mark-before-break idle time. This mode is only
needed when attempting to send DMX to an input on some Strand Ethernet nodes.