Getting Started; Power Supply; Basic System Hook-Up; Midi Dimmers - Leprecon LM-850 Manual

GETTING STARTED

POWER SUPPLY

The LM-850 receives its power from an external 12-volt AC transformer. This transformer is provided with a
screw, which can be inserted in place of the wall-plate screw, to securely fasten the transformer to the
electrical outlet, eliminating the possibility of an accidental power interrupt. Other voltage adapters may not
work with the LM-850, and could damage its circuitry. Consult your Leprecon dealer before making any
substitutions.

BASIC SYSTEM HOOK-UP

Integrating the LM-850 into a standard lighting system is a fairly simple process. (MIDI control of the
console from a sequencer or computer is more involved; this is covered in the section, "MIDI Functions and
Operation," on page 37.) There are some variables, however, depending on the type of dimmers you will be
using. The LM-850 can accommodate three different dimmer types.
MIDI Dimmers. A simple and convenient system can be set up using MIDI-controlled dimmers, such as
Leprecon's LD-360M and LD-360M-HD. In this situation, the three MIDI Dimmer Interface outputs are used
to send data to the dimmers (see Figure 1). Any number of dimmers can be used, and all should be set to
the same MIDI channel as the console's MIDI Dimmer output (see page 34). Each dimmer does need to be
assigned a specific "starting address" (see the dimmer's manual for setting this value) so that its channels
are assigned to the correct control channels. Dimmers having the same starting address will be controlled
simultaneously by the same console faders.
FIGURE 1
Figure 1. A typical setup using the LM-850 and numerous MIDI-controlled dimmers.
Multiple MIDI dimmers can be connected either to the three Dimmer outputs on the LM-850's rear panel (all
three work in parallel – it does not matter which is used), or the dimmers can be daisy-chained. In this
situation, the console's MIDI Out To Dimmers is connected, via a normal MIDI cable, to the MIDI In of the
first dimmer. Then, a second MIDI cable is run from the MIDI Thru of that dimmer to the MIDI In of the next
dimmer, and so on. So, a MIDI dimmer can be plugged into either a Dimmer MIDI Out from the LM-850, or
into the MIDI Thru of any other connected dimmer.