Johnson Systems JS-ICON 624 ARCH Dimmer Rack - Manual (Page 10)

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System Configuration and Setup
1. SETTING THE DMX START ADDRESS
Select the desired DMX start address for the JS-ICON
™ via the three rotary
DMX START ADDRESS SELECT SWITCHES located on the panel of the
rack (as pictured on the previous page). This start address is selectable in
single channel increments from 001 through 512. All dimmers within a given
JS-ICON ™ will numerically/incrementally follow the selected start address for a
total of six channels. Therefore, if the DMX start address is 001, then the JS-
ICON ™ ’s dimmers will be addressed as 001, 002, 003, 004, 005, and 006.
2. CONFIGURE THE MODE SELECT DIP SWITCHES
DMX TERM: MODE SELECT DIP SWITCH #1
The MODE SELECT DIP SWITCHES are located internally, on the Precision
Demultiplexer Printed Circuit Board (see page 13 for details). To access these
switches, simply open the hinged service bay door.
Setting this switch to the “ON” position activates the DMX “end-of-line”
termination. In a DMX network, the device that appears last in the daisy chain
of devices is designated as the “end of line” and must be terminated properly
to maintain the integrity of DMX data transmission. It is important that only the
“end-of-line” device is terminated.
DMX HOLD: MODE SELECT DIP SWITCH #3
Setting this switch to the “ON” position activates the DMX Hold feature. With
the loss of DMX, the JS-ICON ™ will “hold” the last DMX data levels received
for 2 minutes. Setting this switch to the “OFF” position disables this feature,
and will “hold” the last DMX data levels received for 2 seconds.
DIMMER TEST: MODE SELECT DIP SWITCH #4
Setting this switch to the “ON” position activates the Dimmer Test feature.
This feature enables the selection of one dimmer, or all dimmers, to be turned
full on. Selection of the dimmer is via the rotary DMX START ADDRESS
X1 switch. Setting the DMX address to “001” through “006” turns the
corresponding dimmer output to full. Setting the DMX address to “007” turns
all dimmers outputs to full on. Setting this switch to the “OFF” position will
permit normal operation via DMX and/or analog control.
CURVE SELECT: MODE SELECT DIP SWITCH #5 AND #6
These two DIP switches allow for modification of the dimmer output curve.
Below is a selection chart including the four possible dimmer output curves.
DIP SWITCH #5 DIP SWITCH #6 DIMMER CURVE
OFF OFF Square Law (Factory Default)
OFF ON Direct Drive
ON OFF Channel 1 functions as non-dim with a 50% threshold trigger.
Channels 2 - 6 are assigned as Square Law.
ON ON All dimmers function as non-dims with a 50% threshold trigger.