1. Digital Output — When active, Output is internally connected with the Ground pin. Circuit is open
when inactive. Maximum load is 25 VDC, 120 mA.
2. Ground
3. Digital Input — To activate, connect the Input to the Ground pin. To deactivate, leave disconnected
or apply between 3-15 V.
4. Audio Input (line level)
5. Audio Ground
6. Audio Output (line level)
An external power amplifier should be used when connecting speakers and microphones, as shown
in the diagram.
l * — Relay
l ** — Switch
l M — Microphone
l S — Speaker
Connecting to External Audio and I/O Devices 59
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