Mitsubishi Electric 800 Series Assembly & Installation Manuallines page 22

WIRING
2.5 Safety stop function
2.5.1 Function description
The terminals related to the safety stop function are shown below.
Terminal symbol Terminal function description
*1
For input of the safety stop channel 1.
S1
*1
For input of the safety stop channel 2.
S2
*1
Common terminal for S1 and S2.
SIC
Outputs when an alarm or failure is detected.
So (SO)
The signal is output when no internal safety circuit failure
SOC Open collector output (terminal So (SO)) common
*1
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.
*2 At an internal safety circuit failure, the operation panel displays one of the faults shown on Seite 17.
CAUTION
Use terminal So (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.
2.5.2 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 terminals So (SO) and SOC. The reset button acts as the feedback input for the safety relay module or the safety
programmable controller.
RESET
Emergency stop
button
16
So (SO)
SOC
+24 V
PC
Fuse
24 V DC
S2
S1
SIC
SD
Safety relay module/
Safety programmable controller
Between S1 and SIC, S2 and SIC
Open: In safety stop mode
Short: Other than the safety stop mode.
OFF: Internal safety circuit failure
*2
exists.
ON: No internal safety circuit failure
Inverter
Logic
Gate
CPU ASIC
Driver
G
*2
*2
R/L1 S/L2 T/L3
IGBTs
Gate
Driver
G
U V W
M