Page 34 - 11. Glossary of technical terms
A2K-T4-V2.2 27/08/2014 11:19:00
channel is turned off, it turns on faster. This
technique is called Preheat.
RACK PATCH
Patching mode where dimmers are allocated to
sequential DMX control channels
RCB
Residual Current Breaker. Helps to protect the user
against electrocution by detecting an imbalance
between the current leaving the unit down the live
conductor and the current returning down the
neutral, and isolating the supply the current differs
by more than 30mA.
RISE TIME
The time taken for the mains output to rise to full
voltage when the dimmer channel turns on. This
happens 100 times per second and has a large effect
on the amount of interference generated by the
dimmer (longer rise time = less interference). It also
affects the acoustic noise made by a lamp filament.
START ADDRESS
The first DMX channel used by the dimmer or fixture.
Usually a block of channels is used, starting from the
Start Address.
TERMINATION
The end of a DMX run should always be fitted with a
terminating resistor to prevent data problems. The
ART2000 rack has switches to do this.
TN-S
Type of three phase power system with neutral
bonded to earth at the substation, and a separate
earth conductor throughout the system.
