Fleenor DMX DECELERATOR II Users Guide

Model: DMX DECELERATOR II

Operations Manual

Manual Revision
August 2019

Doug Fleenor Design, Inc.
396 Corbett Canyon Road
Arroyo Grande, CA 93420

[phone] Voice and FAX

Product Description

Output setting

Break time

MAB time

Inter-byte time

Update rate

BYPASS

Copied from input

Copied from input

Copied from input

Copied from input

SLOW

272 µs

120 µs

52 µs

20.5 Hz

MEDIUM

220 µs

86 µs

16 µs

30.3 Hz

FAST

200 µs

36 µs

4 µs

40.1 Hz

STRAND*

228 µs

33 µs

4 µs

31 Hz

The DMX DECELERATOR II 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 II produces a DMX output signal with
“relaxed” timing characteristics which are required by some DMX receiving devices. In
addition, a bypass mode is offered. While this mode is selected, the timing of the input
signal is copied to the output. The input remains isolated from the output.

Environmental

Operating temperature: 0-40º C (32-104° F)
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 II. 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 II.
They are not connected internally.

Setting the Speed Switch

The recessed front panel switch is used to select the timing characteristics of the output
signal. The available settings have timing characteristics as shown below. The output
speed setting is held in non-volatile memory. The most recent setting is recalled at
power up.

* 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.

LED Indicators

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.

MIMIC

Tracks the current level of slot 1 for troubleshooting purposes

BYPASS

Output timing is identical to the timing of the input signal

SLOW

Slow output timing is selected (see table above for specifics)

MEDIUM

Medium output timing is selected (see table above for specifics)

FAST

Fast output timing is selected (see table above for specifics)

POWER

On when power is on

Jumper

Installed function (default)

Removed function

JP1

No output on loss of DMX input

Hold last look on loss of DMX input

JP2

Disable driver on loss of DMX

Leave driver enabled on loss of DMX

JP3

Use front panel selection timing

Set output for Strand timing

JP4

Send last look if JP1 is removed

Send zeros on loss of DMX if JP1 is removed

JP5

Enable output normally

Stop sending DMX if all incoming levels are zero

The LED indicators on the front of the DMX DECELERATOR II have the following
functions:

Jumper Settings

Internal jumpers can be removed to change the behavior of the DMX DECELERATOR

II’s output. To access the jumpers, remove the 4 screws which hold the front panel in

place. With the screws removed, the front panel can be removed and the top cover
panel can be slid out giving access to the jumpers on the circuit board. The jumpers
have functions as shown in the table below.

Limited Manufacturer's Warranty

Products manufactured by Doug Fleenor Design (DFD) carry a five-year parts and labor
warranty against manufacturing defects. It is the customer's responsibility to return the
product to DFD at the customer's expense. If covered under warranty, DFD will repair
the unit and pay for return ground shipping. If a trip is necessary to the customer's site
to solve a problem, the expenses of the trip must be paid by the customer.

This warranty covers manufacturing defects. It does not cover damage due to abuse,
misuse, negligence, accident, alteration, or repair by other than by Doug Fleenor
Design.

Most non-warranty repairs are made for a fixed $50.00 fee, plus shipping.

Doug Fleenor Design, Inc.

396 Corbett Canyon Road
Arroyo Grande, CA 93420
[phone] voice and FAX

(888) 4-DMX512 toll free [phone]

web site: http://www.dfd.com
e-mail: [e-mail]