129
Appendix A
Glossary
The following table lists terms related to the S8M Digital Multicircuit Protector and a brief description of the
terms. For details, see the referenced page.
Term Meaning Page
abnormal current tripping When a branch output's current exceeds the set value, that output is cut off.
The tripping value can be set between 0.5 and 4.0 A (0.5 to 3.8 A in the UL
Class 2 output model). The Tripping Alarm Output (TRP) is turned OFF when
the output is cut off.
21, 57
abnormal voltage tripping When the input voltage exceeds 28.8 V, all of the branch outputs will be cut off
immediately. The Tripping Alarm Output (TRP) is turned OFF when the outputs
are cut off. It is not necessary to set parameters for this function.
26
alarm output The Alarm Output (ALM) is turned OFF when the S8M detects an overcurrent,
overvoltage, undervoltage, or excessive run time.
26, 40
alarm type A branch output's overcurrent alarm can be detected with standard detection
(tripping within 100 ms) or instantaneous detection (tripping within 20 ms).
59
ALM ALM is an abbreviation for the Alarm Output Terminal.
The ALM output is turned OFF when an overcurrent, overvoltage, undervolt-
age, or excessive run time is detected.
14, 41
branch output A branch output is one of the S8M's output circuits. The S8M has four branch
outputs.
2, 40
communications The standard model (S8M-CP04-R) and UL Class 2 output model (S8M-CP04-
RS) are equipped with an RS-232C port. The S8M can be connected to a com-
puter running the Support Tool or a network such as a CompoWay/F network.
6, 41
communications settings The RS-232C port settings must be set when connecting to the Support Tool or
a host computer.
67 to 71,
96
CompoWay/F CompoWay/F is one of OMRON's general-purpose FA networks. 6
current fuse When a branch output could not be cut off by the semiconductor relay, a current
fuse will blow to protect the circuit. If the fuse blows, that branch output will
become unusable.
16, 26
cut off A branch output will be cut off when the S8M detects an abnormal current or
voltage. At this point, the error code will be displayed on the seven-segment
display and the Tripping Alarm Output (TRP) will be turned OFF.
26
DIN Rail Used to install the S8M. 37
external tripping input Branch outputs can be forcibly cut off with an input to the External Tripping
Input (TRG terminal). The shutdown sequence function will operate in this
case.
The Support Tool and communications can also be used to cut off branch out-
puts, in addition to the External Tripping Input (TRG terminal).
40, 31
instantaneous 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 instantaneous detection, the output will be cut off
or the alarm will be output within 20 ms if the current is higher than the set
value continuously for 10 ms or longer.
57, 59
monitoring The S8M's operating status can be seen at a glance by connecting the Support
Tool. The Present Values Window or Status Window can be selected.
93
operating mode There are three operating modes in the S8M: Run Mode, Setting Mode, and
Tes t M od e.
7, 49
overcurrent alarm When the branch output's current exceeds the preset alarm value, the Alarm
Output (ALM) is turned OFF. The alarm value can be set between 0.5 and 4.0 A
(0.5 to 3.8 A in the UL Class 2 output model).
25, 58
over-temperature output The S8M has a built-in temperature sensor that monitors the internal tempera-
ture. The Over-temperature Output (TMP) will be turned OFF when the internal
temperature exceeds the set value.
28, 63
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