Microedge Instruments iLog Series User Manual page 29

High alarm and low alarm -> Alarm1
Excitation control -> A2/EXT
Excitation control -> A2/EXT and both alarms ->
Alarm1
Excitation control -> A2/EXT and low alarm ->
Alarm1
Excitation control -> A2/EXT and high alarm ->
Alarm1
The following schematics illustrate the physical connections required to control and drive an
external device by the alarm output:
Alarm1 is used as switch to turn on/off siren based on alarm state.
If the alarm device needs more power to drive, A1 provides control signal to drive a coil relay as
follows:
iLog Data Loggers User's Manual
terminal and low-alarm state controls
A1 terminal.
Both high and low alarm states control
A1 terminal.
Excitation controls A2/EXT terminal.
Excitation controls A2/EXT and both
high and low alarm states control
Alarm1 terminal.
Excitation controls A2/EXT terminal
and low alarm state controls Alarm1
terminal.
Excitation controls A2/EXT terminal
and high alarm state controls Alarm1
terminal.
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