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Scheduled operation using the UPS monitoring software
● When performing scheduled operation in which the UPS is stopped and the commercial power is stopped
using a breaker and so on at the same time, specify a period within 3 months for the start of the next
operation.
If you specify a period longer than 3 months, the internal timer is reset and the scheduled operation does
not start.
Notice that this period reduces to approximately half when the battery is dead.
If 3 months are exceeded, you start operation by supplying commercial power and press the Start Switch.
However, if the battery is dead, you may not be able to start operation. In this case, replace the battery
according to "6-2 Replacing the battery" on page 29.
Start of operation in scheduled operation using the UPS monitoring software
● In order to bring the UPS in pause due to scheduled operation into operation status with the Start Switch,
press the Start Switch for at least 0.5 second. It goes into operation status after 15 seconds.
To stop the operation, press the Stop Switch for at least 2 seconds.
Auto restart after OS closing processing using the UPS monitoring software
● For certain PCs(*1), they automatically restart immediately after the completion of OS closing processing
by auto shutdown when a power failure occurs.
In this case, the UPS stops during or after the restart of the PC and files and hard disk may be broken.
You can avoid this phenomenon by disabling POWER MANAGEMENT in the BIOS settings of the PC.
*1) Certain PC: It is known that this phenomenon occurs for MICRON's Millennia Mme.
8-2 Details on Contact Signal
Contact Signal
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 input-
ting 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 2 kinds of output signals. The output circuit consists of a transistor circuit insulated by a photo
coupler.
● Backup signal output: BU
Stays ON (LOW) during a power failure.
As the output circuit is configured sharing with RS232C interface circuit, however, BU signal output
circuit is connected with the internal circuit. (Refer to "Example of BU signal output circuit and the
connected circuit" on page 39.)
● Battery low signal output: BL
Goes ON when the battery becomes week during the Battery mode. It goes ON (LOW) at least 2 min-
utes before the backup stops. The time may become less than 2 minutes if the battery becomes weak
and the backup time becomes shorter.
The output circuit is an open collector circuit.
8. Using the UPS monitoring software and Contact Signal
Explanation
37
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