Owner 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.

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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.
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LED indicators The LED indicators on the front of the DMX DECELERATOR have the following functions: LED label Function SIGNAL On when DMX input is present. It is off when DMX is not present and the HOLD LAST LOOK feature is disabled (default). It flashes when no DMX is present and the HOLD LAST LOOK feature is active.