1. Digital Input — To activate, connect the Input to the Ground pin. To deactivate, leave disconnected or
apply between 3-15 V.
2. Ground
3. Digital Output — When active, Output is internally connected with the Ground pin. Circuit is open when
inactive. Maximum load is 25 VDC, 120 mA.
4. Audio Output (line level)
An external power amplifier should be used when connecting speakers and microphones, as shown in
the diagram.
5. Audio Ground
6. Audio Input (line level)
l
* — Relay
l
** — Switch
l
M — Microphone
l
S — Speaker
Connecting to External Audio and I/O Devices 24
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