Dove Systems DM-124 - Manual (Page 5)

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The output channel is protected by a 20 amp fuse. Replace it only with another 20 amp fuse. The fuse
is in line with the output load. If the fuse blows, it is always due to an overload or short in the output
load.
CONTROL CONNECTIONS
DMX-512 control signals are input through the male five pin XLR connector on the case of the unit.
The connector is wired as follows:
Pins 4 and 5 are not used but are passed through to other equipment.
The dimmer packs are wired in series along the control cable: the cable is daisy-chained from pack to
pack. Do not split the cable. Use one of the specialty interface boxes for this purpose.
A Starting Channel
The starting channel is set on a thumbwheel switch. When the switch reads 001, the dimmer pack
runs on channel 1. Setting 005 runs on channel 5, setting 009 runs on channel 9, and so on. Valid
addresses range from 001 to 512. The starting dimmer may be any channel, and dimmers on different
packs can overlap some channels, though it is usually preferable to run them one dimmer per chan-
nel. Dimmer channels should not overlap channels for other DMX equipment, including strobe lights,
moving lights, and fog machines. It is not necessary to set the starting channels in sequence (i.e. 1, 2,
3, etc).
B DMX Termination
DMX termination may be made on the DIP switch on the case. It is necessary to terminate the end of
a DMX-512 cable to avoid signal reflections. Signal reflections can cause corruption of the DMX-512
data, typically causing flickering or flashing of lights in the system. Only the last pack in the chain
should have termination enabled.
C Load Test, Local Control, Non-dim, and Emergency On Functions
The thumbwheel switch enables the load testing / local control function. The load test is useful for de-
termining which load is plugged in, finding a burnt-out lamp, and putting light on stage when the con-
troller is not plugged in. Set the first digit to 6. Set the second digit to 1. Set the third digit to the
dimming level, from 0 (off) to 9 (full on). Levels thus set remain in effect until the power is
disconnected.
Controller channels 1 - 12 Pack #1 Pack #2 Pack #3
Dim 1 Dim 2 Dim 3