3.5 Safety stop function
3.5.1 Function description
The terminals related to the safety stop function are shown below.
For input of the safety stop
Common terminal for terminals S1 and S2
Outputs when an alarm or failure is detected.
The signal is output when no internal safety
Terminal SO (open collector output) common
In the initial status, terminals S1 and PC, S2 and PC, and SIC and SD are respectively shorted with shorting wires. To use the safety
stop function, remove all the shortening wires, and then connect to the safety relay module as shown in the following connection
At an internal safety circuit failure, the operation panel displays one of the faults shown on the next page.
Use the terminal SO to output a fault and to prevent restarting of the inverter. The signal cannot be used as safety stop
input signal to other devices.
3.5.2 Connection diagram
To prevent automatic restart after a fault occurrence, connect the reset button of a safety relay module or a safety pro-
grammable controller across the terminals SO and SOC. The reset button acts as the feedback input for the safety relay
module or the safety programmable controller.
Safety relay module/
Safety programmable controller
Terminal function description
Between S1 and SIC
Between S2 and SIC
OFF: Internal safety circuit failure
No internal safety circuit failure
Open: In safety stop mode
Short: Other than the safety stop mode
R/L1 S/L2 T/L3
U V W