2.2rosspoint control
onnecting button panels
Crosspoints may be selected by connecting a button panel (eg. Pro-Bel’s 8 button
6200 or 16 button 6202) to the control socket on the K3048.3 rear panel and setting
PL2 to ‘Button’ . Alternatively, custom button panels can be built using the following
wiring diagram.
he 3408 switcher has priority switching built in. If two keys are pressed
simultaneously, the higher numbered one will be selected. his feature allows ‘line
up’ to be performed quickly. o achieve this, one key must be held down and a
higher numbered key pushed and released. Each time the higher numbered key is
pushed and released that source will be selected, as long as the button is held down.
Once the button is released, the previous source is selected again.
wo 8x1 modules may be independently controlled from a 16 button panel, such as
the Pro-Bel 6202. his particular panel has two separate connectors to plug into the
control socket on each module, simplifying the installation. If the internal expansion
cables are fitted (see Source expansion), priority switching can be performed across
several modules. he highest priority module will always be the leftmost, viewed
from the front of the cards.
Using binary control
o use binary control instead of a button panel, PL2 must be set to ‘BIN’. Crosspoints
may be selected by binary addressing according to the table below, using 12V CMOS
levels using the Control socket on the rear connector.
6 Issue 3
3408
SEL 1 SEL SEL 3 SEL 4 SEL 5 SEL 6 SEL 7 SEL 8OV LAMPSUP GND
Example 8 way button panel wiring diagram
