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6. Using the Contact Signal
8. Example of the use of the Contact Signal circuit
●
Example of the use of the BU signal
●
Example of the use of the BS signal
9. Precautions and notes on the use of the Contact Signal
BU
COM
12V
1K
Ω
System side
To port on PC
Connecting cable
(twisted or
shielded)
UPS side
TLP627
GND
BS
COM
System side
C2458
12V
1K
Ω
1
.
2
K
Ω
TLP521
To port on PC
Connecting
cable (twisted
or shielded)
UPS side
Notes
●
When connecting a device that generates counter electromotive force to the signal output circuit
such as a relay, connect diodes to prevent counter electromotive force at the both end of the
relay.
Explanation
●
When power recovers after automatic stop of UPS at a power failure, the UPS automatically
restarts and supplies power. If you do not want to start the connected devices, turn off their
switch in advance.