46
8. Using the UPS monitoring software and contact signal I/O
3. Connection to the system
Please design a cable wiring by yourself.
(For the samples of the circuit, see "7. Example of connection: the Contact Signal I/O Circuit" on page 46.)
4. Contact Signal I/O ratings
●
Signal output (BU and BL)
Photo coupler ratings
Applied voltage:
24VDC or less
Maximum current: 10mA
●
Signal input (BS)
Input voltage: HIGH 5 to 12VDC, LOW 0.8VDC or less
•
BS is acceptable both in usual service mode and backup mode.
BS becomes unacceptable when voltage signal continues over 10 seconds.
•
BS is acceptable only in backup mode.
BS becomes unacceptable when voltage signal continues over 0.01 second (10ms).
* For further information on the setting of the UPS Stop Signal, see "9-1 Functions that can be set/
change from the UPS” on page 47.
5. Contact Signal I/O circuit inside
the UPS
6. Example of the use of the Contact Signal I/O circuit
8-6 Precautions and notes on the use of the
Contact Signal I/O
Notes
When connecting a device that generates counter electromotive force such as a relay to the signal output
circuit, connect a diode to prevent counter electromotive force across the relay.
Explanation
●
After shutdown processing and recovery from a power failure, the UPS automatically restarts and supplies
power. If you do not want to start the devices connected to the UPS, turn off their switches in advance.
●
The UPS monitoring software allows you to disable the automatic restart.
●
Example of the use of the BU signal
●
Example of the use of the BS signal
To port on PC
Connecting cable
(twisted or shielded)
12V1K
System side
GND
BU
TLP627
BS
C2458
GND
12V
1K
TLP521
GND
To port on PC
Connecting cable
(twisted or shielded)
System side
1.2K
ＢＵ
Ｂ
Ｌ
Ｂ
Ｓ
2.4V 560
