3
Controllers
599-00
• When the chair is no longer occupied, the SPST switch opens, triggering another set of sequenced
commands. These, in turn, could cause the lights to brighten, the drapes to open and the music to turn
off.
• Many other scenarios are possible, limited only by the imagination and needs of the installer and user.
Driving a Relay
There are times when you may want to drive a relay directly from the ON/OFF outputs of the 599-00 to trigger
a device, such as a power amplifier, drape pulls, screen drops, etc. -- devices that require a momentary dry
switch closure.
Fig. 4
illustrates how this can be done.
OFF
ON
GND
+12V
IN +
IN –
GND
+12V
599-00
PULSED SWITCHING
MODULE
SYLMAR, CA • MADE IN U.S.A.
®
786-00
Power Supply
(Most 5 to 12 VDC unregulated
power supplies will work)
+
–
Plug into the
AV System's
Switched AC
Outlet
1N4001
Back EMF Diode
(see
CAUTION
above)
+
–
1N4148
Isolation Diodes
(see text)
781RG
Power Supply
To 120 VAC
(unswitched)
Relay
(Coil: 6 VDC
@ 20 mA)
N/O
To device requiring a
momentary dry switch
closure for activation
Fig. 4
Driving a Relay For a Momentary Dry Closure
OFF
ON
GND
+12V
IN +
IN –
GND
+12V
599-00
PULSED SWITCHING
MODULE
SYLMAR, CA • MADE IN U.S.A.
®
From a System's 4 to
12 VDC non-momentary
control voltage output
+
–
1N4148
Isolation Diodes
(see text)
781RG
Power Supply
To 120 VAC
(unswitched)
To an amplifier or other
device requiring a
momentary trigger
pulse for power On/Off or
other type of activation
+
+
• The DC control voltage may be a power supply adapter connected to the switched outlet of an AV receiver,
as illustrated, or any other 4 to 12 VDC controlling source.
• The two 1N4148 signal type diodes provide isolation between the ON & OFF outputs, yet combine them
so that a momentary pulse drives the relay for both the On and Off transitions.
•
CAUTION:
A 1N4001 diode (or equivelant)
must
be connected in parallel with the relay coil as shown.
This prevents high relay coil back EMF from damaging the 599-00 during switching transients.
DC On/Off to Momentary On/Off
Some preamps, or A/V control centers, have a 0 to 12 VDC output control port for the express purpose of
turning a companion amplifier, with a non-momentary DC control voltage port, On and Off.
However, some amplifiers (or other devices), have a control port that requires a momentary pulse to trigger
the On/Off condition. The 599-00 is an ideal module for making this conversion.
Fig. 5
illustrates how this is done.
• The non-momentary DC control voltage from the preamp or other controller, is connected to the
IN+
and
IN–
terminals as shown.
Fig. 5
DC On/Off to a Momentary
Pulsed On/Off Trigger