■ Frame n×R8i inverter unit (internal power supply)WARNING!Frame R8i inverter modules are as standard delivered with a jumper wire set thatsupplies 24 V from connector X53 to X52. The jumper wire set must be removedbefore wiring the Safe torque off circuit.234 The Safe torque off function Frame n×R8i inverter unit (internal power supply)+24 V OUT1SGNDIN1IN2XSTOKIN1SGNDXSTO OUTIN2SGND24VDC CH1GND CH1STO IN (X52)24VDC CH2FEGND CH224VDC CH1GND CH1STO OUT (X51)24VDC CH2FEGND CH224VDC CH1GND CH1STO IN (X52)24VDC CH2FEGND CH224VDC CH1GND CH1STO OUT (X51)24VDC CH2FEGND CH2Control unitInverter moduleTo nextinverter moduleInverter module192 The Safe torque off function