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7. Using the contact signal I/O card
7. Using the contact signal I/O card
7-1 Adding a signal I/O card
A Contact Signal I/O card can be added in the option card slot on the backside of the UPS.
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Signal I/O cards (Model: SC05) are sold separately.
7-2 Details on contact signal I/O (SC05 card)
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 a battery capacity sufficient to prepare for
the next occurrence of a power failure.
1. Signal output
The UPS has three kinds of output signals. The output circuit takes a form of an open collector circuit using
a photo coupler (a kind of electronic switch).
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Backup signal output: BU
BU stays ON during a power failure.
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Reverse signal of BU: BU
BU stays OFF during a power failure.
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Battery low signal output: BL
BL goes ON (LOW) when the remaining battery capacity is getting low in Battery mode.
2. Input of the UPS Backup Stop Signal (BS)
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The minimum acceptance time of the input signal necessary for shutdown operation is 10 msec or more.
●
Accept backup stop signal only during Battery mode
You can stop the UPS by transmitting a continuous voltage signal (high) from outside the UPS.
The signal is acceptable only during backup operation.
3. Connection to the system
It is the user’s responsibility to take care of the cable connection to the system.
(For sample circuits, see "7. Example of the use of the Contact Signal I/O circuit" on page 49.)
4. Signal I/O connector (DSUB9P female)
Pin Configuration
Pin No.
1
2
3
4
5
6
7
8
9
Signal Name
FG
BU
BU
COM
BL
BS
COM
NC
NC
Front view
Screw type:
inch screw #4-40 UNC
5 4 3 2 1
9 8 7 6
