AC power is available when the system is powered off.
(b)With a UPS battery fitted together with the power management kit:
1.The standby LED lights steadily to indicate the presence of AC power at system powered off. The system cannot be turned on if the AC power fails. The power LED goes ON and the standby LED goes OFF when the system is powered up.
2.During power failure period at system turned on, the power LED flashes to indicate that the system is running on battery power.
3.The power LED turns OFF and the standby LED flashes rather fast as the UPS battery approaches a discharged condition to remind the operator that power will soon finish. In few seconds, the whole system will soon be automatically turned off and both LED’s will be OFF.
In case the AC power resumes during the usage of the battery, the flashing LED will keep on flashing for few seconds till the AC supply is stable.
POWER ON/OFF CONTROL
The PST7700 terminal implements electronic power control, such that the main power to the system may be controlled by many methods as below:
1.Hardware power switch
2.Software OFF command
3.Automatic power ON control
4.Emergency power OFF
Switching from OFF to ON requires a normal supply of the AC power.
Hardware Power Switch
This button is located on the lower right hand front edge of the keyboard and can be used to turn the system on and off alternatively if no optional power management kit installed. When this option is installed, the external switch can also be programmed to be an ON only switch through software command so that when this switch is accidentally pressed during system turned on, the system just remains on and unaffected.
Software Off Command
The system may also be shut down under software control if the optional power management kit is installed. Please just follow the arrangement by your system integrator for this capability.
Automatic Power On Control
The system may also turn on according to some preset conditions such as Modem Ring Up and Alarm Clock Wake Up or LAN Wake Up.
To utilize Modem Ring Up or Alarm Clock Wake Up function, the user should enter the CMOS setup by pressing “Del” key at system boot up,
Part 15
