Omron S8M - User Manual

Other manuals for Omron S8M

Questions and Answers

M
Mitchell Alvarez PhDSep 12, 2025
Why can't I reset the Omron Surge Protector connection immediately after a cutoff ('RST' displayed)?
- D
  David FisherSep 12, 2025
  If the connection cannot be reset immediately after it is cut off and 'RST' is displayed on your Omron Surge Protector, it is because, to protect the S8M's internal circuits, at least 15 seconds must pass before a cut-off output can be reset. Press the Reset Key for at least 3 s. “RST” should be displayed and the cut-off output can be reset after 15 seconds have passed since the cutoff.
L
Leslie SilvaSep 12, 2025
Why is the Omron Surge Protector temperature display different from the room temperature?
- M
  Mark GriffinSep 12, 2025
  If the displayed temperature on your Omron Surge Protector is clearly different from the ambient temperature, it is because the S8M detects the S8M's internal temperature, which can be 10 to 20°C higher than the ambient temperature. If the over-temperature output is being used to control a fan or cooling equipment, set the over-temperature output value based on the graph on page 29.
M
Michael HernandezSep 12, 2025
Why is the Omron Surge Protector flashing 'ON' in Test Mode but not supplying power?
- B
  Bailey DixonSep 12, 2025
  If your Omron Surge Protector is flashing “ON” in Test Mode, but power is not being supplied by the outputs, it indicates that the S8M is waiting to turn ON the outputs. If the Mode Key is pressed, the output will be connected and power will be supplied. When power is being supplied, “OFF” will flash on the display to indicate the S8M is waiting to turn OFF the output.
B
Brittany HamiltonSep 9, 2025
How to clear the run time alarm on Omron Surge Protector?
- C
  christina93Sep 10, 2025
  If the run time alarm was output on your Omron Surge Protector, so the equipment was checked and other parts were replaced, but the alarm could not be cleared, it is because the S8M continues adding to the run time. Clear the run time and then press the Reset Key for at least 3 s. The alarm can also be cleared by increasing the run time value and then resetting.
L
Lisa FrancisSep 8, 2025
Why does the Omron Surge Protector output cut off immediately after being reset?
- S
  Stephanie GuerreroSep 9, 2025
  If the output was reset on your Omron Surge Protector, but it was immediately cut off again, it means that the original cause of the cut-off may not have been eliminated. Eliminate the problem that caused the cutoff and press the Reset Key for at least 3 seconds.
P
Patricia DeleonSep 7, 2025
What to do if the set value change isn't accepted on Omron Surge Protector?
- S
  sabrinahollowaySep 7, 2025
  If the set value was changed, but the change wasn't accepted on your Omron Surge Protector, it is because the new setting was not saved. After pressing the Up and Down Keys to change the set value, press the Mode Key and verify that the setting flashes and the setting is saved.
L
Lee PachecoAug 23, 2025
What to do if the Omron Surge Protector output was reset, but it was immediately cut off again?
- K
  Kristen MccannAug 23, 2025
  If the Omron Surge Protector cuts off immediately after being reset, it's likely the original cause of the tripping hasn't been resolved. You need to eliminate the issue that's causing the cutoff. After fixing the problem, press the Reset Key for at least 3 seconds.
L
Lisa PayneSep 5, 2025
How to clear an alarm on Omron Surge Protector after the cause is fixed?
- J
  Jonathan HatfieldSep 5, 2025
  If an alarm was output on your Omron Surge Protector and the cause of the alarm was eliminated, but the alarm display was not cleared, it is because the S8M doesn't disregard temporary errors, so the display and output are maintained even after the cause of the alarm is cleared. You can clear the alarm by pressing the Reset Key for at least 3 seconds.
A
Andrea KingSep 5, 2025
How to attach the bottom of the Omron Surge Protector to the DIN Rail?
- M
  Meghan EdwardsSep 5, 2025
  If the S8M was installed on a DIN Rail, but the bottom of the Unit is not attached on your Omron Surge Protector, the S8M's bottom latch is not mounted properly. Ensure that the S8M has been pressed until the bottom latch clicks.
S
Scott ParkerSep 3, 2025
Why the peak output current value is not displayed on Omron Surge Protector?
- S
  Susan HobbsSep 4, 2025
  If the peak output current value is not displayed on your Omron Surge Protector and the display shows “- - -”, it's possible that the current has exceeded the measurable range. To resolve this, clear the peak output current value in Run Mode.

Omron S8M Specifications

General

Brand	Omron
Model	S8M
Category	Surge Protector
Language	English

Summary

SECTION 1 Features and Functions

1-1 Overview of Features and Functions

Introduces the S8M's features, digital processing, and advantages over mechanical protectors.

1-2 S8 M Operations and Operating Modes

Explains the three operating modes (Run, Setting, Test) and how to switch between them.

1-3 Table of Basic Functions

Summarizes tripping and alarm functions, external outputs, and input specifications.

1-4 S8 M Operating Procedure

Outlines typical startup procedures using keys or the support tool.

SECTION 2 Specifications and Functions

2-1 Component Names and Functions

Identifies and describes the S8M's physical components and their functions.

2-2 Internal Configuration

Provides block diagrams showing the internal circuitry of different S8M models.

2-3 Specifications

Lists detailed electrical and environmental ratings and characteristics for S8M models.

2-4 Basic Function Details

Explains core functions like current protection, over/undervoltage alarms, and over-temperature output.

2-5 Startup Sequence Function

Describes the function that applies a time delay to branch output connections upon startup.

2-6 Shutdown Sequence Function

Details the function that applies a time delay to branch output cutoffs.

SECTION 3 Installation and Wiring

3-1 Installation Environment

Specifies precautions for selecting an installation site and maintaining ambient conditions.

3-2 Installation

Provides instructions for mounting the S8M on a DIN rail and its correct orientation.

3-3 Wiring

Details wiring precautions, recommended wire types, and torque specifications for terminals.

3-4 RS-232 C Port Wiring (S8 M-CP04-R and S8 M-CP04-RS Only)

Explains how to create and connect cables for RS-232C communication.

SECTION 4 Parameter Settings

4-1 Parameter Table

Presents a comprehensive table of all settable parameters, their display, and access levels.

4-2 Parameter Setting Ranges

Lists the setting ranges and default values for each S8M parameter.

4-3 Switching the Operating Mode

Describes how to navigate the Mode Selection Menu and switch between modes.

4-4 Changing the Protection Level

Explains how to change the protection level to restrict parameter access.

4-5 Switching to Setting Mode

Details the procedure to enter Setting Mode from Run or Test Mode.

4-6 Individual Branch Output Settings

Guides users through setting parameters specific to each branch output.

4-7 Shared Parameter Settings

Covers parameters that apply across multiple branches, like alarms and run time.

4-8 Special Settings and Communications Settings

Explains settings for startup/shutdown sequences, tripping inputs, and communication.

SECTION 5 Trial Operation to Actual Operation

5-1 Test Mode

Explains how to use Test Mode for checking branch output connections before operation.

5-2 Connection;Disconnection Test

Details the procedure for testing and manually connecting/disconnecting branch outputs.

5-3 Checking Sequence Operation

Describes how to verify the startup and shutdown sequence operations.

5-4 Run Mode

Explains how to operate the S8M in Run Mode and monitor various parameters.

SECTION 6 Support Tool

6-1 Installing the Support Tool

Guides users through downloading and installing the S8M Support Tool software.

6-2 Starting the Support Tool

Explains how to launch the Support Tool and navigate its interface.

6-3 Setting and Saving Parameters

Details how to configure, save, and download parameters using the Support Tool.

6-4 Monitoring

Describes how to monitor the S8M's operating status using the Support Tool.

6-5 Other Settings

Covers configuring communications settings and protection levels via the Support Tool.

SECTION 7 Communications

7-1 CompoWay;F Communications Specifications

Outlines the communication specifications and methods used by the S8M.

7-2 Frame Structure

Explains the structure of command and response frames for S8M communication.

7-3 Details of Services

Describes available communication services like reading data and executing commands.

7-4 Read Controller Information

Details the service for reading the controller's model and version information.

7-5 Read Controller Attributes

Explains how to read the model number and communications buffer size.

7-6 Read Controller Status

Describes the service for reading the S8M's operating and error status.

7-7 Echoback Test

Explains the procedure for performing an echoback test for communication verification.

7-8 Operation Command

Details the commands for controlling S8M operations like connect, disconnect, and reset.

7-9 Response Code List

Provides a list of response codes and their meanings for communication errors.

7-10 ASCII List

Lists ASCII character codes for communication data.

SECTION 8 Error Processing

8-1 Troubleshooting

Offers solutions for common observed problems encountered during S8M operation.

8-2 Seven-segment Error Codes

Lists and explains error codes displayed on the S8M's seven-segment display.

8-3 Clearing Errors

Provides instructions on how to clear errors using the Reset Key or Support Tool.

Appendix A Glossary

Glossary

Defines key terms and concepts related to the S8M Digital Multicircuit Protector.

Appendix B List of Operations

Mode Selection Menu Operations

Illustrates the menu flow for navigating between different operating modes.