Control circuit
43
2
2.6.6
Safety stop function
Function description
The terminals related to the safety stop function are shown below.
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 diagram.
At an internal safety circuit failure, the operation panel displays one of the faults shown on the next page.
NOTE
• Use the terminal SO to output a fault and to prevent restarting of the inverter. The signal cannot be used as safety stop input
terminal to other devices.
Connection diagram
To prevent automatic restart after a fault occurrence, connect the reset button of a safety relay module or a safety
programmable 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.
Terminal
symbol
Terminal function description
S1
For input of the safety stop channel 1.
Between S1 and SIC, S2 and SIC
Open: In safety stop mode
Short: Other than the safety stop mode.
S2
For input of the safety stop channel 2.
Common terminal for S1 and S2.
SO
Outputs when an alarm or failure is detected.
The signal is output when no internal safety circuit failure
exists.
OFF:Internal safety circuit failure
ON:No internal safety circuit failure
SOC
Open collector output (terminal SO) common
R/L1
S/L2
T/L3
U V
W
M
SO
SOC
S1
S2
G
G
ASIC
Inverter
SIC
SD
Logic
RESET
Emergency
stop button
Safety relay module
/ Safety programmable controller
PC
Gate
Driver
Gate
Driver
IGBTs
Fuse
24 VDC
CPU
+24V
