IDA8 Global-Net User Manual166
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3.3.1 RU-MAIN
RU-MAIN device is a device supplied with full-redundancy for audio processor. It is in charge of
switching primary and secondary audio processor to active one of them. If primary audio processor is
active, all signal of peripherals shall be directed to the primary audio processor. RU-MAIN device is
also capable to monitor the status of audio processor. If primary audio processor breaks down, RU-
MAIN device will detect automatically and switch to secondary audio processor.
3.3.1.1 Front Panel
Secondary Active Indicator:
This LED lights up if secondary audio processor is active.
Primary Active Indicator:
This LED lights up if primary audio processor is active.
Fault Indicator:
This LED lights up if the unit is set to be slave, and a short or open is detected on S. WD
(Secondary Watching Dog) port.