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3.
GPIO Wiring
The General Purpose Inputs & Outputs can be connected to external devices to allow simple
monitoring & remote control of the silence detector.
‘SSR’ stands for Solid State Relay which are highly reliable and provide much greater life than
standard relays. For connecting to external devices both connections of the SSR should be
used to form a ‘loop’. When the associated SSR function is active on the silence detector then
the SSR loop will be made and a connection will be present between the 2 contacts of the
SSR.
The absolute maximum ratings of the loop of the SSR are 100mA and 400V.
To make the ‘Force’ inputs work you need to connect the pin number of the function you
want to activate to Ground (pin 13). So for example if you want to force the Aux B audio input
to the B output then connect pins 25 and 13 together.
PIN NO
FUNCTION
1
SSR Output Loop Indicating Main Audio in A is OK
14
SSR Output Loop Indicating Main Audio in A is OK
2
SSR Output Loop Indicating Main Audio in B is OK
15
SSR Output Loop Indicating Main Audio in B is OK
3
SSR Output Loop Indicating that Main In A is currently selected
16
SSR Output Loop Indicating that Main In A is currently selected
4
SSR Output Loop Indicating that Main In B is currently selected
17
SSR Output Loop Indicating that Main In B is currently selected
5
SSR Output for Remote Start (Active when Aux A audio is selected)
18
SSR Output for Remote Start (Active when Aux A audio is selected)
6
SSR Output for Remote Start (Active when Aux B audio is selected)
19
SSR Output for Remote Start (Active when Aux B audio is selected)
11
Force Main A audio input to A output
24
Force Main B audio input to B output
12
Force Aux A audio input to A output
25
Force Aux B audio input to B output
13
Ground (earth) for use with pins 11,12,24,25 see note below
