Omron S8M - User Manual

Other manuals for Omron S8M

Questions and Answers

Terrance JacksonAug 25, 2025

Why is the Omron Surge Protector circuit cut off as soon as power is supplied?

P
Patricia ProctorAug 25, 2025
If your Omron Surge Protector circuit is cut off as soon as power is supplied, even though it wasn't designed for such a high current, the abnormal current tripping type might be set to 'instantaneous'. This setting detects abnormal current very quickly, potentially cutting off the circuit due to excessive current during equipment operation. You can either change the abnormal current tripping type from instantaneous to standard or raise the current tripping value. Alternatively, if there are a lot of devices connected to the output, which increases the operating current, use the S8M's startup sequence function to delay the connection of some devices.

Brand	Omron
Model	S8M
Category	Surge Protector
Language	English

Brand

Omron

Model

S8M

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.