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TOSHIBA
15
UPS Connections
Communication Interface (cont'd)
UPS Stop Signal Operation
When the UPS stop signal is sent to the UPS through pin 2 and 3 of the external contact interface,
it is possible to automatically reset the following operation systems (OS), which can automatically
implement the shutdown function and restart the operation:
Applicable OS: Windows NT, IBM OS/2 LAN server, LANtastic
Not applicable: NetWare
When the power fails, the OS detects the power failure signal from the UPS and starts the
shutdown process.
At the end of the shutdown process, the OS outputs a stop signal to the UPS, and the UPS stops.
When the power recovers, the UPS automatically starts output and restarts the OS. Even
when the power recovers while in a shutdown process, the UPS temporarily cuts off the
output (10 - 20 seconds) and then restarts the OS within 10 minutes after the recovery from
power failure. In this case the UPS cuts off output even with normal input power. Connect the
UPS stop signal of the external contact interface only for the automatic processing so that the
UPS output will not be cut off by mistake. If a stop signal is input to the UPS 10 minutes or
more after the recovery from a power failure, then the UPS ignores this signal and continues
to output power.
If the computer is started/restarted within 10 minutes after the recovery from a power
failure, the power supply may be reset while the computer is restarting.
normal
backup
power failure
OS shutdown
UPS stop signal from OS
UPS output voltage
checking time
temporarily cuts off the
output for 10 to 20 secs.
continues output
10 minutes
General Safety
Inspections & Precautions
Connections
Equipment
Equipment
Specifications
Equipment
Display Screens
Manual Run/Stop
Protection System
Maintenance & Options
Dimensions &
Weights
Index
Reference
Operations
Key Functions
Display &