Safety Stop Function - Mitsubishi Electric FR-F820-00077 Instruction Manual

Control circuit
2.6.7

Safety stop function

Function description
The terminals related to the safety stop function are shown below.
Terminal
symbol
S1
S2
SIC
SO
SOC
Tab. 2-26:
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 page 2-65.
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 mod-
ule 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.
RESET
Emergency
stop button
Fig. 2-44:
2 - 64
Terminal function description
For input of the safety stop channel 1.
For input of the safety stop channel 2.
Common terminal for S1 and S2.
Outputs when an alarm or failure is detected.
The signal is output when no internal safety circuit failure
exists.
Open collector output (terminal SO) common
Safety stop signal
SOC
24 V DC
Safety relay module/
Safety programmable controller
Connecting the Safety relay module
Inverter
SO
Logic
+24V
PC
Fuse
S2
S1
SIC
SD
Installation and wiring
Between S1 and SIC, S2 and SIC
Open: In safety stop mode
Short: Other than the safety stop mode.
OFF: Internal safety circuit failure
ON: No internal safety circuit failure
R/L1 S/L2 T/L3
G G
U V W
M
I003010E