Omron S8M - Page 21

3
Overview of Features and Functions Section 1-1
Error Display and Tripping
Functions
When the input voltage, current, internal temperature, or run time exceeds the
set value, the error code will be displayed on the seven-segment display and
the branch output will be cut off or an alarm will be output and the branch out-
put will remain connected. Error codes are displaying in order of their severity,
so the source of the error can be isolated quickly.
Three S8M Models
Available
There are three models of the S8M Digital Multicircuit Protector available, as
shown in the following table. The models share the same performance and
basic functions such as tripping and alarms, but differ in the internal circuit
configuration (see note 2) and communications ports. Select the appropriate
model for your application.
Note (1) The Support Tool cannot be used with the S8M-CP04, which is not
equipped with a communications port.
(2) Refer to 2-2 Internal Configuration for internal circuit block diagrams.
Basic Functions
Tripping Functions The branch output is cut off when an abnormal voltage or abnormal current is
detected. In this case, the tripping alarm output will be turned OFF and the
corresponding error code will be shown on the seven-segment display. (For
details, refer to 2-4 Basic Function Details.)
Model RS-232C port Redundant tripping circuits
S8M-CP04-R Yes No
S8M-CP04-RS Yes Yes
S8M-CP04 No No
S8M Digital
Multicircuit Protector
AC/DC Power Supply
S8M Support Tool
The S8M-CP04-R/-RS
can be connected.
Branch outputs 1 to 4
Abnormal voltage
tripping
When the power supply voltage exceeds 28.8 V, all of the
branch outputs will be cut off by the semiconductor relays.
The S8M system monitors the voltage, so it is not necessary
to set parameters.
Abnormal current
tripping
When a branch output's current exceeds the set value, that
output is cut off by its semiconductor relay. The tripping type
for abnormal current detection can be set to standard detec-
tion (tripping within 100 ms) or instantaneous detection (trip-
ping within 20 ms).