6 Contact signal functions
6-1 Type of input and output signals
BW40T/BW55T/BW100T/BW120T
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6 Contact signal functions
The UPS can use USB/connection port as the contact signal.
When using as the contact signal, use a contact signal cable (type: BUC31) separately
sold.
* When using as USB, use the attached USB cable.
6-1 Type of input and output signals
The UPS has the following input signals and four kinds of output signals.
The output circuit consists of an open collector circuit using a photo coupler (a kind of
electronic switch).
Pin assignment and signal name of contact port
Signals
Descriptions
Input of backup stop signal (BS)
The input signal for stopping the output of the
UPS
Backup Signal output (BU)
Stays ON 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 self-diagnostic test
determines that battery replacement is necessary
due to deterioration or when the battery life
counter goes off-scale.
