130
Glossary Appendix A
overvoltage alarm When the input voltage exceeds the preset alarm value, the Alarm Output
(ALM) is turned OFF. The alarm value can be set between 20.0 and 28.8 V.
26, 61
peak output current The peak output currents for branch outputs 1 to 4 can be read in Run Mode.
The peak output currents can be cleared using S8M key operations or from the
Support Tool.
protection level The protection level can be set to one of three levels to restrict read/write
access to the parameters. This function can be used to prevent parameters
from being changed or deleted inadvertently.
54, 54,
97
RS-232C port The standard model (S8M-CP04-R) and UL Class 2 output model (S8M-CP04-
RS) are equipped with an RS-232C port. The RS-232C port can be connected
to a computer running the Support Tool or a host computer.
14, 41
Run Mode Each branch output is connected and the input voltage, current, internal tem-
perature, and run time are monitored continuously.
8, 78
run time alarm Tracks the run time and outputs an alarm when the run time exceeds the alarm
value.
30, 71
run time clearing The run time can be cleared. 71
semiconductor relay Branch outputs are not cut off mechanically in the S8M. Each branch output is
connected/cut off by a high-capacity FET (transistor).
2
Setting Mode This operating mode is used to set the parameters. A new S8M automatically
starts in Setting Mode when it is turned ON for the first time.
9, 51
shutdown sequence When outputs are cut off by the external tripping signal, the shutdown
sequence can set a separate delay for cutting off each branch output.
31, 65
standard detection (alarm
type and tripping type)
Each branch output's tripping current and abnormal current can be detected
with standard detection (tripping within 100 ms) or instantaneous detection
(tripping within 20 ms). With standard detection, the output will be cut off or the
alarm will be output within 100 ms if the current is higher than the set value
continuously for 80 ms or longer.
57, 59
startup delay Tripping operation can be disabled for 70 ms when the power is turned ON in
order to prevent the inrush current from being detected as an abnormal current
and cutting off operation. The peak output current value will still be updated
during the startup delay.
30
startup sequence The startup sequence can set a separate delay for the connection of power to
each branch output. This function can reduce the inrush current and voltage
drop that occur when the power is turned ON.
30, 61
Support Tool The Support Tool can be used to set/save the S8M's various parameters, mon-
itor operation, and force outputs ON and OFF.
The Support Tool can be downloaded to a computer (Windows 2000 or XP)
from OMRON's home page free of charge.
SEC-
TION 6
Support
To o l
Test Mode Each branch output can be set to ON or OFF (connected or disconnected).
Also, the operation of the startup sequence and shutdown sequence can be
verified.
9, 74
thermal fuse If current is not cut off by the semiconductor relay alone, the built-in thermal
fuse will blow to protect the circuit.
16, 26
TMP TMP is an abbreviation for the over-temperature output terminal.
The ALM output is turned OFF when the temperature exceeds the over-tem-
perature output value. The TMP output is independent of the alarm output, so it
can be used to control cooling equipment to reduce the temperature in the con-
trol panel.
14, 41
TRG TRG is an abbreviation for “trigger” and represents the external tripping input.
Power at selected branch outputs can be forcibly cut off by an external input
signal. The shutdown sequence function will operate in this case.
14, 41
tripping alarm output When the S8M detected an abnormal voltage or current, the branch output is
cut off and the Tripping Alarm Output (TRP) is turned OFF.
3
tripping type A branch output's tripping current can be detected with standard detection (trip-
ping within 100 ms) or instantaneous detection (tripping within 20 ms).
57
Term Meaning Page
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