Getting Started
3-2
Revision 0.1 – 3 June 1999
FP12 DIMMER
USER MANUAL
3.3
Powering up
Turn on the power and check that the three PHASE indicator LEDs are on before
connecting any loads. If any of the PHASE LEDs are dim or off, power down and
remedy the fault before trying again. Refer to section 5.3 Phase fault indication.
If all is well, power down and connect loads.
3.4
Connecting loads
The standard output connectors are twelve Clipsal 415P 10 amp sockets (export models
may differ from these configurations). Ensure any plugs are pushed firmly into their
sockets.
The FP12 will drive most incandescent loads as well as pinspots, fans, and dimmable
fluorescent tubes. The load should be within the specified limits.
3.5
Connecting DMX-512 input
The input signal to the dimmer should conform to the USITT DMX-512 1990
specification. The DMX input connects to the frontpanel socket labelled “DMX IN”. The
DMX signal may be daisy-chained to the next dimmer via the connector labelled
“LOOP”.
The red DMX IN LED indicates the presence of DMX signals.
The DMX receiver input is protected against extreme over-voltages across any input pins
and from any input to chassis. The “terminating” resistor is not protected against over-
voltages.
3.6
DMX Termination
In any DMX-512 system the signal should be terminated at the last dimmer or receiver in
the chain, and the FP12 can provide this function. To terminate the DMX signal, set the
frontpanel slide switch from “Loop” to the “Term” position. Note that in this position no
signal is present at the “Loop” connector.
3.7
Power-up sequence
When powering up lighting systems, the following sequence should be used:
1. First the control desk;
2. Then any softpatches and/or DMX receivers;
3. Finally the dimmers, preferably one at a time starting from the first dimmer rack in the
DMX loop.
This procedure minimises the risk of lamps and fixtures responding to any false DMX
data produced by control desks or ancillary equipment at turn-on (producing the lighting
equivalent of an audio “thump”) and prevents damage to lamps, dimmers, and other
controlled devices.
Use the reverse procedure when powering down.
Disconnect mains power when not in use.
Summary of Contents for FP12
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