AMT Datasouth Accel-7350 Service Manual page 89

Power cutoff detection
When the power of the CPU is cutoff or 40 V system power voltage falls below 30 V due to
trouble, PWOFF signal turns to "1" and the CPU is interrupted. When the CPU accepts this
interrupt, it finishes all printing and mechanical action and writes necessary data (present paper
position) to EEPROM. During approx. 500 msec. after detection of PWOFF signal, power
voltage of 5 V system is assured.
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