72
Using a contact signal
8
8
Adding a contact signal card
An additional contact signal card can be installed in the contact signal input/output slot on the back of the
UPS.
●
Contact signal card (model number: SC07), sold separately
●
Contact cable (model number: BUC28), sold separately
* When using the unit in the SC05 compatible mode, use an optional BUC10 cable.
Contact Signal
You can develop your unique system based on the following speci
fi
cations to automate the pro-
cess 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 Low battery level signal. Also, by inputting the backup stop signal from the system, you can
stop the UPS with a suf
fi
cient battery level to prepare for the next occurrence of a power failure.
1. Signal
output
The UPS has 4 kinds of output signals. The output circuit consists of an open collector circuit us-
ing a photo coupler (a kind of electronic switch).
●
Backup Signal output: BU
BU stays ON during a power failure.
●
Low battery level signal
output: BL
Goes ON when the battery becomes weak
during the Battery Mode.
●
Trouble Signal output: TR
Goes ON when an internal failure of the UPS
occurs.
●
Battery Replacement Signal output (WB)
Goes ON when the test determines that
battery replacement is necessary due to
deterioration.
BU-COM ON when a power failure occurs
BL-COM ON when the battery is low
TR-COM ON when a power failure occurs
WB-COM ON when battery deterioration is detected
2. Signal
input
●
Input of the UPS Stop Signal (BS)
Stops the output of the UPS after the time period speci
fi
ed by the “power output stop delay time
setting” has elapsed.
(1) When the "BS signal valid range setting" (setting switch
5
) is set to OFF:
You can stop the output of the UPS by inputting the voltage signal (HIGH) that lasts at least
10 seconds from the outside.
(2) When the "BS signal valid range setting" (setting switch
5
) is set to ON:
You can stop power output by inputting the voltage signal (HIGH) that lasts at least 0.01 sec-
ond (10 ms) from the outside that is accepted only during backup.
See also
"4-4 Changing the setting of the functions" "2. UPS operation mode settings"
➛
Page
29, 34
BS-COM UPS stops
8-1
Using a contact signal card
