9.3 Alarm Signal Output (Alarm Output)
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Chapter 9 External Control
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This signal is output when alarm criteria are satisfied.
Specify the desired alarm criteria.
See: "5.2 Alarm Output" (p. 109)
9.3 Alarm Signal Output (Alarm Output)
Alarm signal output
(ALM1 to ALM4)
When alarm criteria are satisfied
The LED for the activated alarm output channel lights red.
About the Alarm Output Signal
Output signal Open collector output (with voltage output), active LOW
Output voltage
range
HIGH level: 4.0 to 5.0 V, LOW level: 0 to 0.5 V
Output Refresh Every recording interval
Maximum
switch rating
5 to 30 VDC, 200 mA
GND
ALM(1 to 4)
10 k
5 V
DC12 V
12 V
External relay
for 12 V
ALARM
max200[mA]
DC5 V
10 k
Below is a diagram showing the structure map of the HiLogger’s
alarm output circuit, and an example of a connection with the relay.
Example of an alarm output connection
HiLoggers
Signal Output Procedure
Connect the HiLogger's ALM external control terminals to the external
devices.
(See the connection procedure on p. 41 )
When the alarm criteria are satisfied, a Low level (0 to 0.5 V) signal is output.
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