Index – Yokogawa DAQWORX User Manual
Page 23
1-15
IM WX102-01E
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Index
Before Operation
Alarm output relay energize/de-energize
The alarm output relay can be switched between energizing mode and de-energizing
mode. If de-energizing mode is selected, the alarm relay can still be energized in the
same way as when an alarm occurs, even if the power is turned OFF due to a power
failure or other reasons.
NO
energizing
mode
de-
energizing
mode
C
NC
NO
C
NC
NO
C
NC
NO
C
NC
NO
C
NC
NO
C
NC
Power is OFF
Alarm is present
No alarm is present
NO
energizing
mode
de-
energizing
mode
C
NO
C
NO
C
NO
C
NO
C
NO
C
Power is OFF
Alarm is present
No alarm is present
a-contact
c-contact
Alarm output relay AND/OR
If one alarm output relay is shared by more than two channels or alarm levels, the output
method for the alarm output relay can be selected from the following two methods.
AND : Energizes the alarm relay when all the alarms occur simultaneously.
OR : Energizes the alarm relay when an alarm occurs in any of the channels or at any
of the alarm levels.
Alarm
Channel 1
AND
Channel 2
OR
Alarm output relay
Note
The reflash relay is always used in OR mode.
1.5 DA100 Functions