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12.2. Inputting Control Signals
12.2.1. Input terminals used for external activation
Apply a make signal to the Contact-activated input terminals and another make signal to the control input
terminals for activating each operation.
Use the Contact-activated input terminals to select a playback program number or the phrase number to be
recorded/deleted.
Use the Control input terminals to select each operation of playback, recording, delete/clear, stop, or emergency
broadcast.
12.2.2. Activation by a make signal
To perform external activation, apply a make signal to the Contact-activated/Control input terminals.
The terminal contacts are normally open, and activation is triggered when closed.
Contact is closed
Contact is open
Notes
• A make signal needs to be kept ON for 50 ms or more.
As it takes about 30 to 50 ms until the unit recognizes a make signal after it has been applied to the unit, the
unit may not work if the closed duration is less than 50 ms.
When 2 or more make signals need be input in sequence, allow at least 50 ms interval between first signal
input and second signal input.
If this interval is shorter than 50 ms, operation may not be performed in correct order.
• Note that the time interval of 30 ms to 50 ms is omitted in the diagrams in this manual.
Contact-activated input terminals
ON (Start)
OFF (Stop)
Control input terminals in the
Input/output terminal block
OFF (Stop)
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