YASKAWA ELECTRIC TOBP C730600 23C 1000-Series Option SI-P3/V, SI-P3/T Installation Manual 175 Installation Procedure5 Installation Procedure◆ Section SafetyDANGERElectrical Shock HazardDo not connect or disconnect wiring while the power is on.Failure to comply will result in death or serious injury.Disconnect all power to the drive, wait at least five minutes after all indicators are off,measure the DC bus voltage to confirm safe level, and check for unsafe voltages beforeservicing to prevent electric shock. The internal capacitor remains charged even after thepower supply is turned off. The charge indicator LED will extinguish when the DC busvoltage is below 50 Vdc.WARNINGElectrical Shock HazardDo not remove option board cover while the power is on.Failure to comply could result in death or serious injury.The diagrams in this section may include option units and drives without covers or safetyshields to show details. Be sure to reinstall covers or shields before operating any devices.The option board should be used according to the instructions described in this manual.Do not allow unqualified personnel to use equipment.Failure to comply could result in death or serious injury.Maintenance, inspection, and replacement of parts must be performed only by authorizedpersonnel familiar with installation, adjustment, and maintenance of this product.Do not use damaged wires, place excessive stress on wiring, or damage the wireinsulation.Failure to comply could result in death or serious injury.