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8. Using the UPS monitoring software and contact signal I/O
Notes
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In the case of a WindowsNT server, select from the sever menu as follow. A wrong setting of the remote
UPS shutdown brings about the backup failure of the UPS in the event of a power failure. For further
information, see "Setting UPS" of the WindowsNT4.0 Instruction Manual and/or "WindowsNT4.0 help file.
The signal settings are as follows.
Power supply shutdown signal: Negative (for initial value, WindowNT server is set as negative
while OS2Lan server as positive)
Battery weak/dead signal: Negative (for initial value, WindowNT server is set as negative while
OS2Lan server as negative)
Remote UPS shutdown:
Positxive (for initial value, WindowNT server is set as negative while
OS2Lan server as positive)
●
For Netware users, call up the command screen, and enter as follow to load a UPS module into the file sever.
LOAD UPS TYPE=6 PORT=_ REV=2
After the input, press the Enter key.
Enter the serial port number, which is connected to the UPS, after PORT=. (1 or 2)
8-4 When performing the auto shutdown
processing by the UPS Service of WindowsNT
A standard UPS Service installed in WindowsNT OS computers is available when you use the UPS Service with
an optional cable; BUC16.
●
Connection
•
DOS/V computers............Use an optional cable; BUC16.
•
NEC PC9801, 9821 series............Use an optional cable; BUC19.
8-5 Details on Contact Signal I/O
You can develop your unique system based on the following specifications to automate the process at a power
failure. You can perform power-failure processing by allowing the system to detect the backup signal and also
perform system shutdown processing by allowing the system to detect the battery low signal. Also, by inputting
the backup stop signal from the system, you can stop the UPS with an enough battery amount to prepare for
the next occurrence of a power failure.
1. Signal output
The UPS has two kinds of output signals. The output circuit takes a form of an open collector circuit using
a photo coupler (a kind of electronic switch).
●
Backup signal output: BU
BU stays ON during a power failure.
●
Battery low signal output: BL
BL goes ON (LOW) when the current remaining of the battery is getting flat in the backup mode operation.
BL actually goes ON (LOW) when at least 1.5 minutes before the UPS makes a stop. The time may be
less than 1.5 minutes where the battery becomes deteriorated and the backup time becomes shorter.
2. Input of the UPS Stop Signal (BS)
●
Acceptance of stop signal only in the time of backup mode
You can stop the UPS by transmitting a voltage signal (High) that continued more than 0.01 sec. (10 m
sec.) from the outside of the UPS.
The stop signal is acceptable only in the time of backup mode.
●
Acceptance of stop signal both in the usual service mode and in backup mode.
You can stop the UPS by transmitting a voltage signal (High) that continues more than 10 sec. from the
outside of the UPS.
