Omron S8AS User Manual page 51

Basic Function Details
Abnormal Total Current Tripping Function
region in which the current is limited, as shown in the current tripping charac-
teristics graphs.
Current value
Example sampling chart
The S8AS monitors the total output current as well as the branch output cur-
rents. When the total output current exceeds the set value, all branch outputs
will be cut off. There are a number of conditions for the tripping current and
time. If even one of these conditions is detected, the abnormal total current
tripping function will be activated. The following table outlines the tripping con-
ditions. (Input voltage range: 200 to 240 VAC)
Power-ON Total current (A)
time (s)
240W
1 s min. ---
2 s min. 17 A
5 s min. 15 A
10 s min. 13 A
20 s min. 12 A
−
: Not applicable
Note (1) If the input voltage range is not within the values specified above or the
total output current exceeds the maximum peak current value, internal
operation will become unstable and the branch outputs may be cut off.
(2) Maintain the total current for normal operation after the load devices have
started to within the rated ranges.
(3) Do not allow a peak current to flow again for at least 60 seconds after a
peak current has exceeded the rated current.
Current actually flowing
1 ms sampling period
Time
Operation
480W
27 A When the total
current reaches
25 A
these values, all
22.5 A
branches will be
−
cut off within 20
ms.
−
Section 2-4
Converted digital value
Error code and Conditions
alarm output required to
reset
The error code After tripping
A12 will flash on (15 s has
the seven-seg- elapsed after
ment display the previous
and the Trip- reset.)
ping Alarm Out-
put (TRP)
photoswitch out-
put will turn
OFF.
33