NAD C 272 owner manual Ato Logic Chart, Switch, Amber LED over, Green, 12V TRIGGER, Sleep/Wake

ATO LOGIC

The C 272 amplifier may be turned on in any one of three discrete ways for complete system flexibility: From the front-panel switch, the 12V- TRIGGER circuit, or by a “SLEEP/WAKE” signal-sensing circuit. The ON/OFF power control is managed by the Automated Turn-On logic or ATO Logic circuit that requires the amplifier to be switched back to standby in the same manner by which it was activated. In other words, if the amplifier is switched on via a 12V-control signal, it cannot be switched to standby via the front-panel switch, it must wait for removal of the 12V-control signal. In practice, you probably would use only one of the methods once the NAD C 272 amplifier is installed.

ATO LOGIC CHART

SWITCH	Amber LED over	Green	Green	Green
	front power switch	SWITCH LED	12V-TRIGGER LED	SENSE LED
VACATION switch set to OFF	OFF	OFF	OFF	OFF
VACATION switch set to ON	Amber	OFF	OFF	OFF
Press front power switch with	Green	ON	OFF	OFF
VACATION switch set to ON
Press front power switch with	Amber	OFF	OFF	OFF
VACATION switch set to ON
12V TRIGGER	Amber LED over	Green	Green	Green
	front power switch	SWITCH LED	12V-TRIGGER LED	SENSE LED
VACATION switch set to OFF	OFF	OFF	OFF	OFF
VACATION switch set to ON	Amber	OFF	OFF	OFF
12 V INPUT TRIGGER = 0V with	Amber	OFF	OFF	OFF
VACATION switch set to ON
12V INPUT TRIGGER = 12V with	Green	OFF	ON	OFF
VACATION switch set to ON
SLEEP/WAKE	Amber LED over	Green	Green	Green
	front power switch	SWITCH LED	12V-TRIGGER LED	SENSE LED
VACATION switch set to OFF	OFF	OFF	OFF	OFF
VACATION switch set to ON	Amber	OFF	OFF	OFF
SLEEP/WAKE SENSE DEFEAT switch
set to SENSE DEFEAT with VACATION	Amber	OFF	OFF	OFF
switch set to ON
SLEEP/WAKE SENSE DEFEAT switch
set to SLEEP/WAKE and any source	Green	OFF	OFF	ON
input greater than 20mV with
VACATION switch set to ON

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