7-1 I/O signal functions
7 Using the I/O signal functions
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7 Using the I/O signal functions
7-1 I/O signal functions
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About 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 (BU) and also perform system shutdown processing by
allowing the system to detect the low battery level signal (BL). Also, by inputting the backup
stop signal (BS) from the system, you can stop the UPS with a sufficient battery level to
prepare for the next occurrence of a power failure.
7-1-1 Type of output signals
The UPS has 4 kinds of output signals.
The output circuit consists of an open collector circuit using a photo coupler.
Signal
Description
Backup signal output (BU)
Stays ON during backup operation at a power failure.
Low battery level signal output (BL)
Goes ON when the battery becomes weak during backup operation
at a power failure.
Trouble signal output (TR)
Goes ON when an internal failure of the UPS occurs or when the
battery life counter expires.
Battery replacement signal output (WB)
Goes ON when the test determines that battery replacement is
necessary due to deterioration or when the battery life counter goes
off-scale.
7-1-2 Type of input signals
The UPS has 2 kinds of input signals.
Signal
Description
Input of the UPS stop signal (BS)
When the BS signal is ON (High), the output of the UPS is stopped
after the time period specified in advance has elapsed*.
Remote ON/OFF signal
Remote ON/OFF signals can be used to start and stop the UPS, by
using either an externally connected contact or the ON/OFF status
of the open collector circuit.
When signal is OFF, the UPS will be turned on. When signal is ON,
the UPS will be turned off.
In the factory settings, the UPS stops operation when this is
short-circuited.
In addition, it is necessary to turn on the “Power” switch of UPS to
use this function.
*BS signal delay time
It is possible to set the period of time from when a BS signal is received until the output
of the UPS is stopped. The output of the UPS can be stopped by inputting the voltage
signal (High).
