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BU
2002
RWLG/BU
3002
RWLG /BU
5002
RWLG
7
45
7-2-6. Example of the use of the Contact Signal circuit
●
Example of BU signal output circuit and
the connected circuit
●
Example of BS signal input circuit and the
connected circuit
4.7K
TLP521
+12V
1KΩ
C2
C1
+5V
Inside of
UPS
External
circuit
* C1, C2: 0 pF to several
thousand pF
(Consider the capacity
according to the operating
environment.)
To port
on PC
COM
UPS side
GND
System side
BS
12V
1K
1.2K
TLP521
From port on PC
C2458
Connecting cable
(twisted or shielded)
●
Remote ON/OFF circuit
UPS side
remote ON/OFF ( + )
remote ON/OFF ( - )
Example of
remote ON/OFF
Notes
●
When connecting a device such as a relay that generates counter electromotive force to the
signal output circuit, connect diodes that prevent counter electromotive force to both ends of
the relay.
7-2-7. Precautions and notes for the use of the Contact Signal
Explanation
●
When power is restored after the unit stopped automatically during a power failure, the unit
automatically restarts and supplies power. If you do not want to start the connected devices,
turn OFF their switches or set the auto startup setting after recovery from power failure (“Settings”
- “Boot Settings” - “Auto reboot” on the LCD) to “disable”. (See page 32.)