Mitsubishi Electric 800 Series Installation Manualline page 33

2.5 Safety stop function
2.5.1 Function description
The terminals related to the safety stop function are shown below.
Terminal symbol
*1
Input terminal as the safety stop channel 1.
S1
*1
Input terminal as the safety stop channel 2.
S2
*1
Common terminal for S1 and S2.
PC
Output terminal used for fault detection and fault
indication display.
SO
The terminal is ON (conducted) while no internal safety
circuit failure
SOC Open collector output (terminal SO) common
*1
In the initial status, terminals S1 and PC and terminals S2 and PC are respectively shorted with shorting wires. To use the safety stop
function, remove all the shorting wires, and then connect to the safety relay module as shown in the connection diagram.
*2
When any fault listed on the next page occurs in the internal safety circuit, the corresponding indication is shown on the operation
panel
.
CAUTION
l 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.
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 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.
RESET
Emergency
stop button
*1
To avoid an electric shock hazard, install a magnetic contactor (MC) at the input side of the inverter.
*2
exists.
SO
SOC
+24V
Fuse
PC
S1
S2
Safety relay module/
Safety programmable controller
Terminal function description
Status of both the circuit between terminals S1 and PC
and the circuit between terminals S2 and PC
Open: Safety stop is activated.
Shorted: Safety stop is not activated
OFF:
ON:
FR-E800(-E)
Logic
CPU
CPU
Internal safety circuit failure
No internal safety circuit failure
MC

R/L1 S/L2 T/L3
IGBTs
Gate
Driver
Gate
Driver
U V W
M
WIRING
*2
*2
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