ETC Echo Architectural Control Processor (ACP) v1.0.0 - Manual (Page 77)

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Dimmer Specifications 72
Minimum Scale:
Minimum scale allows you to set a dimmer or a range of dimmers to a minimum output
voltage, which is the bottom of the scaled output of the dimmer(s). The dimmer will switch
on to an RMS output voltage of minimum scale voltage when the control level reaches the
value set for threshold.
• 120V AC systems, default is 6V (min/max 1-140V AC)
• 240V AC systems, default is 12V (min/max 1-280V AC)
• 277V AC systems, default is 12V (min/max 1-300V AC) \
Maximum Scale:
Maximum scale allows you to set a dimmer or a range of dimmers to a maximum output
voltage that is the top (100% control) of the scaled output for the dimmer(s).
• 120V AC systems, default is 115V (min/max 60/140V AC)
• 230/240V AC systems, default is 230V (min/max 120/280V AC)
• 277V AC systems, default is 250V (min/max 140/300V AC)
Dynamic Preheat
Dynamic preheat is the amount of time a dimmer or selected range of dimmers will go to
zero output after the control channel is brought to zero from a higher level. After completing
that off time it will then fade back up to the minimum scale voltage. This feature allows a
true blackout to happen in the facility if only for a few moments.
• Default is Off, available settings also include 0, 2, 5, and 10 seconds.
Transformer Mode
Transformer mode allows you to prevent temporary DC offset by matching the half waves
of the AC output.
DMX Res:
DMX resolution is the mode used to set the movement resolution or accuracy of the
controlled dimmer. Options include:
• Lo 8 bit which requires one DMX address
• Hi 16 bit which requires two DMX addresses.
Normally, output levels are set from 0% to 100%, however, the actual DMX level is an 8 bit
number ranging from 0 to 255. When in 16 bit mode, the resolution changes from 255 steps
to 65535 steps creating the ability for long fade times a smooth transition.