Input Method Of Sto Signal - Hitachi SJ Series User Manual

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Input Method of STO Signal

・Input voltage for the STO signal can be chosen from the

internal power supply of inverter (P24S terminal) or an

external DC24V power supply.

Wiring example

Internal power supply+Sink logic

Short-circuit line

External power supply+Sink logic

short-circuit line

DC24V external power supply (SELV or PELV)

: Direction of current

: Direction of current

・Also, by changing the connecting point of short-circuit

line, you can choose input logic from sink and source.

・By turning off the external switch (contact point) for

STO input shown in the wiring example below, STO

function is enabled, and output to the motor is shuts off.

Internal power supply+Source logic

Short-circuit line

External power supply+Source logic

short-circuit line

DC24V external power supply (SELV or PELV)

Technical Notes

: Direction of current

: Direction of current

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