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User’s Guide
26
Alarm Signal Mode
When the four types of alarm signals are input, the alarm output and
reset signal modes are as followings.
NOTE
The above figure shows the alarm signal mode when you set the alarm reset
mode using M (manual).
• The alarm output mode produces TTL “LOW” level until the alarm is
off.
• The alarm reset output mode produces the above signal mode when
all alarms are off.
• When several alarms are on at the same time, ALARM RESET
OUTPUT maintains the TTL “LOW” level for 150 mS and then
returns to TTL “HIGH” level.
ALARM IN 1
ALARM IN 2
ALARM IN 3
ALARM IN 4
ALARM OUT
ALARM RESET
EVENT OCCURS
EVENT OCCURS
ALARM 2 &
ALARM 3
ACTION
ALARM 3 &
ALARM 4
ACTION
ALARM 1
ACTION
ALARM 3
ACTION
More than
150mS
When you press the RESET
key or when HOLD TIME is
over, it returns to the TTL
“HIGH” level.