1 Preface and SafetyYaskawa manufactures products used as components in a wide variety of industrial systems and equipment. The selection andapplication of Yaskawa products remain the responsibility of the equipment manufacturer or end user. Yaskawa accepts noresponsibility for the way its products are incorporated into the final system design. Under no circumstances should anyYaskawa product be incorporated into any product or design as the exclusive or sole safety control. Without exception, allcontrols should be designed to detect faults dynamically and fail safely under all circumstances. All systems or equipmentdesigned to incorporate a product manufactured by Yaskawa must be supplied to the end user with appropriate warnings andinstructions as to the safe use and operation of that part. Any warnings provided by Yaskawa must be promptly provided tothe end user. Yaskawa offers an express warranty only as to the quality of its products in conforming to standards andspecifications published in the Yaskawa manual. NO OTHER WARRANTY, EXPRESS OR IMPLIED, IS OFFERED.Yaskawa assumes no liability for any personal injury, property damage, losses, or claims arising from misapplication of itsproducts.u Applicable DocumentationThe following manuals are available for the SI-EN3/SI-EN3D option:Yaskawa Bypass 1000-Series Option Single and Dual-Port SI-EN3/SI-EN3D Technical Manual (This manual)The Technical Manual contains information required to install the option and set up related bypass parameters.Z1000 Bypass Technical Manual (SIEPYAIZ1B01)This manual provides detailed information on parameter settings and bypass functions. Use this manual to expandbypass functionality and to take advantage of higher performance features. This manual is available for downloadon our documentation website, yaskawa.com.u TermsNote: Indicates supplemental information that is not related to safety messages.Bypass: Yaskawa Z1000 Bypass UnitDrive: Yaskawa 1000-Series AC DriveOption: Yaskawa 1000-Series SI-EN3 EtherNet/IP Option and SI-EN3D Dual-Port EtherNet/IP Optionu Registered Trademarks• EtherNet/IP is a trademark of the ODVA.• All trademarks are the property of their respective owners.u Supplemental Safety InformationRead and understand this manual before installing, operating, or servicing this option. The option must be installed accordingto this manual and local codes.The following conventions are used to indicate safety messages in this manual. Failure to heed these messages could result inserious or possibly even fatal injury or damage to the products or to related equipment and systems.DANGERIndicates a hazardous situation, which, if not avoided, will result in death or serious injury.1 Preface and Safety4 YASKAWA SIEPYAICOM22 Rev: A0 Bypass Option Single and Dual-Port EtherNet/IP SI-EN3/SI-EN3D Technical Manual