Tyco iSTAR eX, Руководство по установке и настройке

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Backup and Restore
iSTAR eX Installation and Configuration Guide 1–33
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Low Battery – does not directly affect how iSTAR eX responds to power
changes. It is a C•CURE input so its state changes are reported to the host,
and it can be configured to activate events or outputs.
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Backup Now – tells iSTAR eX to initiate the backup process. When this
signal activates, iSTAR eX stops all processes, writes all data to the
Compact Flash, and waits for the AC Fail signal to deactivate.
iSTAR eX receives all three of these signals from the PMB over the Serial
Peripheral Interface (SPI) bus.
iSTAR eX Power Failure Signals
Model NPS
The model NPS iSTAR eX uses two signals to respond to changes in power
availability: AC Fail , and Battery Low . Both of these signals originate in the
External Power supply. Connect the AC Fail output of the External Power
supply to the AC Fail input on J16-GND and J16-IN1. Connect the Battery Low
output of the External power supply to the Low Battery input on J16-IN2. See
Figure 1-2 on page 1-7 for details on the connections.
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AC Fail – tells iSTAR eX that main power has failed. iSTAR eX uses this
signal to determine whether to turn on the LCD backlight. If AC has
failed, iSTAR eX turns off the LCD backlight, which saves approximately
100 mA of current. Additionally, this signal exists as a C•CURE input, so
it can be configured to activate events or outputs, and its state changes are
reported to the host.
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Low Battery – tells iSTAR eX that the external power supply has a low
battery condition. Low Battery does not directly affect how iSTAR eX
responds to power changes. It is a C•CURE input so its state changes are
reported to the host, and it can be configured to activate events or
outputs.