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When either Input #2 or #3 is selected with a maintained closure, DigiSwitch will switch to that input. When the closure is
released, DigiSwitch will return to Input #1.
DigiSwitch provides TALLY outputs to drive external indicator LEDs. The Tally outputs are open collectors, which go LOW when
the input is active. Connect status LEDs between each TALLY output and +12V (pin 5) on the D connector.
Termination: AES DigiSwitch 3X1 is supplied with 110 ohm terminating resistors installed.
automatically terminated. To defeat this feature, remove the terminating resistors as needed:
INPUT #1: R17
INPUT #2: R19
OPERATION
Operation is straightforward. Activating any control input will select the corresponding audio source. Switching always occurs at
the leading edge the control input. Only one source can be selected at a time. Do not "overlap" control inputs; doing so will
lock-out all audio sources. The remote Tally indicators will follow whichever front panel pushbutton is illuminated.
Remote Disable: If the REMOTE DISABLE input (pin 6) is connected to GROUND (pin 4), ALL inputs will be OFF; no signal
will be sent to the OUTPUT. When the ground connection is released, the input previously active will return ON. Note that input
ill active even if the DISABLE function is used.
selection is st
FOR AUTO-RETURN OPERATION
Install these components, see diagram at right:
D6, D7: 1N4004 diodes X2
C2:
35uF/25V capacitor
R3
10K ¼ W resistor
Install jumpers J1P, JP2, JP3 according to input
signal used for control. See text for details.
INPUT #3: R21
Inputs that are not selected are
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