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(Remaining HDD Capacity Alarm Output)
CONTROL Input/Output
(15)
Alarm Device
Relay, etc.
(6)
Ground
Power Failure Process
Completion Output
UPS Shut Down
Line Fail signal
(Normally Open)
C
Before connecting the UPS,
refer to the manual of
your UPS.
Power Failure Detect Input
Ground Common
Power Cable
Disk Recorder
WJ-HD500A
CONTROL
(19) (17) (16)
Uninterrupted
Power Supply
to AC outlet
■ Connection with the Uninterrupted Power Supply (UPS)
• The figure shows an example of how to connect a UPS as protection against power failures.
• When a power failure detect input is received from the UPS, the disk recorder's power failure process starts to process this
signal to turn off its power supply.
• When the power failure process is completed, the disk recorder outputs a signal to the UPS.
• When the UPS receives the completion signal from the disk recorder, the disk recorder's power is turned off
■ Connection with CONTROL output
• Signal outputs (Pins #1-6, 18) can be used to connect alarm devices such as a buzzer or lamp to inform you of the opera-
tion status by sounding a buzzer or lighting a lamp when a signal is output.
• The figure below shows an example of how to connect an alarm output (Pin #6) to warn of low remaining HDD capacity.