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Master In/Out:
The master controller input will accept a seventh
KHSGS
controller. This controller will then become a master
control for the entire system. If “Source 1” is selected on this controller, all zones will switch to Source 1.
If volume up is pressed, all zones will go up and visa versa volume down will lower all zones. If mute is pressed,
any zones active will be muted.
the “Master Out” jack can be connected to the “Master In” on a second KHS-6640 to allow master control of
2 units (12 zones).
Individual rooms then can override this and return to a local zone mode. this way individual zones can be
changed to suit the listener in a particular zone.
Unit On:
When the “On” LED is lit, there is a
+5v
DC applied to these pins that can be used to control any equipment
such as relays or digital switches. This voltage is switched off when the “Power” button is out or the KHS-6640
is in the “sleep” mode such as with no sources playing.
Trig On:
By applying
+5v
to
+12v
DC to thyese pins, the KHS-6640 can be temporarily “awakened”. If no sources are
present, the KHS-6640 will return to the “sleep” mode when the voltage is removed.
Using Multiple KHS-6640 Units:
Up to 3 KHS-6640 units may be wired together to provide 18 zones of listening pleasure. First connect all
sources into the first KHS-6640 and use the “Source Outs” to connect to the “Source Ins” on the second unit.
Then use the Source Outs on the second unit to connect into the Source Ins on the third unit. Next, using
Y-
adapters
(2-l/8”
plugs to I-
l/8”
jack), connect all emitter outputs of the KHS-6640 to proper source emitters.
Lastly, any connections made to page/doorbell status connectors must also be made to the other KHS-6640’s.
Adding More Audio Power to the KHS-6640:
If you need more audio power in a zone, simply attach an RCA cable in between the “Line Out” jacks and the
inputs of an external power amplifier. This allows virtually unlimited volumes to be obtained. (Multiple outdoor
speakers are a prime example).
Section 4: Special Wiring Schemes:
The following connections are made to the KHS-6640 via the 12 pin terminal block located on the back of the
unit. Cat-5 wire or doorbell wire is perfectly suitable for all of these connections.
1. Page/ Doorbell Status:
Paging:
The 6640 has two ways to allow external paging to be amplified through the it. the jacks labeled “Audio
Input” will accept any audio signal and will mute the sources and play the page audio automatically. The page
sensitivity and level adjustable via trim pots located inside the KHS-6640 (see fig. 1). Additionally, there are
two pins labeled “Mute Input”. When a DC voltage
(+5v
to
+12v)
is applied to these pins the source audio
will also be muted.
Doorbell: The KHS-6640 has two built-in and distinctly different doorbell sounds
‘i”ding”
and “ding dong”).
Either doorbell can be triggered by attaching wires from the houses doorbell transformer (switch side) to the
terminals on the KHS-6640 labeled “Doorbell A or B”. Any voltage from
5v
to 24v AC or DC will trigger the
doorbell. This allows this feature to be used with most types of existing doorbells. Doorbell volume can be
adjusted via a trim pot located inside the KHS-6640 (see fig. 2). The paging and doorbell features can be
further customized in each zone. You can disable the page/doorbell feature in a zone by setting both slide
switches on that zone board to “Off”. This might be of use in a nursery, for instance. You can set a zone to
only mute the sources, but not play the page or doorbell by setting “Switch” to “On”, but setting “audio” to “Off”.
Finally, you could set “Switch” to “Off’ and set “Audio” to “On”. This would allow the page or doorbell audio
to mix with the source audio (see fig. 3).
Telephone Entry Systems:
(Channel Vision or similar)
The
KHS-6640 is well suited to be integrated into a telephone entry system such as the Channel Vision TE-
100. With these systems you can page from any phone in the house. Trigger to doorbell or mute the system
in some or all zones. Please consult their owner’s manuals for operation.
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