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 4 of 12 TM.F7.03The Safe-Off option requires a special F7 control board (ETC 619320-S7160) and terminal board (ETC 619330)which replace the standard drive control board and terminal board. The most salient difference is the ETC 619330terminal board’s third row of control terminals containing the BB, BB1 and SN Safe-Off connections. The SNSafe-Off terminal is electrically connected to the standard SN terminal.BB and BB1 have the same opto-coupler interface as the other digital inputs, S1 through S8, and operate from thesame isolated 24V on-board control supply. Whereas S1 through S8 connect only to the F7’s I/O processor, BBand BB1 also connect to hardware buffers that can block the gate drive signals to the IGBTs and prevent the motorfrom running.The drive software interprets BB and BB1 exactly as a conventional “External Baseblock” command. Otherwise, allstandard F7 parameters and monitors retain their original functionality. In fact, multifunction digital inputs (S3though S8) can still be programmed as conventional “External Baseblock N.O.” and “External Baseblock N.C.” tomaintain compatibility with previous utilizations.Safe-Off Circuitry Blocks the IGBT Gate Signals Through Two Separate Hardware Channels3.0 Changes From Standard Productto IGBTGate DriversGate DriveSignals fromProcessorEnableTo ProcessorSC