The AES-402 is a two-input switcher which can operate automatically. When placed in the automatic mode, the unit monitors the incoming audio stream and can switch to an alternate path on user-selectable error flags, loss of clock or user-defined silence. The unit can be commanded remotely or locally to switch as well.The silence sensor can be set for 30, 60, 90 and 120 seeconds of delay before switching. The selected channel status indicator can even be set to blink to indicate audio level under threshold or loss of audio. All automatic switching functions are user configurable. The unit can be set up for any combination of silence and/or error switching. There is even a setting to disable the front panel switcher and mode select buttons for tamper proof operation. Full GPIO and serial remote control is available on the rear panel. We even included addressable RS-485 remote control so that multiple AES-402 units can be controlled through a single RS-485 control pair. Click here for more information.

　　AES-402 DIP Switch Programming Guide of Operation Table 1. S1-1 OFF = Front Panel Button Disables A/B and AUTO/MAN Buttons - Factory Default – ON

　　Silence Sensor Time out Parameters:

　　S1-3 S1-2 Silence Timeout (SEC) OFF OFF 120 OFF ON 90 ON OFF 60 Factory Default ON ON 30

　　S1-4 Silence Detector L Channel - ON = Silence detection enabled S1-5 Silence Detector R Channel - ON = Silence detection enabled

　　S1-6 Silence Indication on A/B Select buttons - ON = Enabled – Factory Default ON S1-7 Unused S1-8 Serial Control Enable - ON = Enabled - Factory Default ON

　　Digital Parameter Switch Selection:

　　S2-1 AES Error Switching Delay – Factory Default ON S2-2 Unlock – ON - Factory Default ON S2-3 Parity – ON -Factory Default ON

　　S2-4 - UNUSED -

　　S2-5 CRC S2-6 Audio Bit S2-7 Non-PCM Audio S2-9

　　Remote Control – Parallel/GPIO DB9F Connection Table 2.

　　Pin 1 +5 VDC @100mA. Pin 2 Auto Mode Select Pin 3 Select B Input Pin 4 Select A Input Pin 5 Error Reset Pin 6 Status Common Pin 7 Status – 'B' Selected Pin 8 Status - 'A' Selected Pin 9 Auto Mode Status

　　Command input pins 2, 3, 4, 5 require a momentary closure to ground. Status connections open collector outputs with 5 VDC pull up.

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