YASKAWA F7 Technical Manual

Also see for Varispeed f7: Connection manual Programming manual User guide Instruction manual User manual

Contents

Date: 10/15/07, Rev: 07-10 Page 3 of 12 TM.F7.03The Safe-Off function option involves two added digital inputs, BB and BB1, as well as supply terminal SN on theterminal board. Removing the voltage from either terminal BB or BB1 disables the drive motor output. Bothterminals BB and BB1 must be energized (connected to SN) for the drive to start or run the motor. BB and BB1individually break the drive signals to the output devices (IGBTs) resulting in a reliable means of removing powerfrom a motor and preventing it from restarting until both BB and BB1 are reenergized. As long as either BB or BB1is open (deenergized), no command given the drive will start or run the motor no matter how the drive isprogrammed, configured or commanded.The F7 with Safe-Off option is shipped from the factory with a jumper connecting BB and BB1 to SN. This jumperallows the F7 “out of the box” to operate as a conventional F7 drive without Safe-Off. The jumper must beremoved to use the Safe-Off option.The time from opening either Safe-Off input until the drive output is switched off is less than 10 milliseconds.2.0 Basic ConceptSafe-Off terminalsshown with factoryjumper in place