1 Preface and Safety6 YASKAWA ELECTRIC SIEP C730600 89C YASKAWA AC Drive Option SI-EP3 Technical Manual General SafetyGeneral Precautions• The diagrams in this book may include options and drives without covers or safety shields to illustrate details. Be sure to reinstallcovers or shields before operating any devices. Use the option according to the instructions described in this manual.• The diagrams in this manual are provided as examples only and may not pertain to all products covered by this manual.• The products and specifications described in this manual or the content and presentation of the manual may be changed withoutnotice to improve the product and/or the manual.• Contact Yaskawa or a Yaskawa representative and provide the manual number shown on the front cover to order new copies of themanual.DANGERHeed the safety messages in this manual.Failure to comply will cause death or serious injury.The operating company is responsible for any injuries or equipment damage resulting from failure to heed the warningsin this manual.WARNINGElectrical Shock HazardDo not attempt to modify or alter the drive or drive circuitry in any way not explained in this manual.Failure to comply could cause death or serious injury and will void warranty. Yaskawa is not responsible for anymodification of the product made by the user. Do not modify this product.NOTICEDo not modify the drive or option circuitry.Failure to comply could result in damage to the drive or option and will void warranty.Yaskawa is not responsible for any modification of the product made by the user.Do not expose the drive or the option to halogen group disinfectants. Do not pack the drive or the option infumigated or sterilized wooden materials. Do not sterilize the entire package after packing the product.Failure to comply could damage electrical components in the option.