Safety stop function
The terminals related to the safety stop function are as follows.
Input terminal as the safety stop channel 1.
Input terminal as the safety stop channel 2.
Common terminal for S1 and S2.
Output terminal used for fault detection and fault indication
The terminal is ON (conducted) while no internal safety circuit
Open collector output (terminal So (SO)) common
In the initial status, terminals S1 and PC, S2 and PC, and SIC and SD are respectively shorted with shorting wires. To enable the safety stop
function, remove all the shorting wires, and then connect a safety relay module as shown in the connection diagram.
When any fault listed on the next page occurs in the internal safety circuit, the corresponding indication is shown on the operation panel.
• Terminal So (SO) can be used to display a fault indication and to prevent restarting of the inverter. The signal output from
terminal So (SO) cannot be used to input a safety stop signal to other devices.
To prevent restart at failure occurrence, connect terminals So (SO) and SOC to the reset button, which are the feedback input
terminals of the safety relay module.
Safety relay module /
Safety programmable controller
Terminal function description
Status of both the circuit between terminals S1 and SIC and
the circuit between terminals S2 and SIC
Open: Safety stop is activated.
Shorted: Safety stop is not activated
OFF: Internal safety circuit failure
ON: No internal safety circuit failure
R/L1 S/L2 T/L3
2. INSTALLATION AND WIRING
U V W
2.6 Control circuit