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Function Description; Connection Diagram - Mitsubishi Electric FR-A800 Installation Manuallines

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WIRING
3.5 Safety stop function

3.5.1 Function description

The terminals related to the safety stop function are shown below.
Terminal symbol
*1
S1
For input of the safety stop
*1
S2
*1
Common terminal for terminals S1 and S2
SIC
Outputs when an alarm or failure is detected.
The signal is output when no internal safety
SO
circuit failure
SOC
Terminal SO (open collector output) 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 the next page.
CAUTION
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.
RESET
Emergency
stop button
26
Channel 1
Channel 2
*2
exists.
SO
SOC
+24V
PC
Fuse
24VDC
S2
S1
SIC
SD
Safety relay module/
Safety programmable controller
Terminal function description
Between S1 and SIC
Between S2 and SIC
OFF: Internal safety circuit failure
ON:
No internal safety circuit failure
FR-A800
Logic
CPU
ASIC
Open: In safety stop mode
Short: Other than the safety stop mode
*2
*2
R/L1 S/L2 T/L3
IGBTs
Gate
Gate
Driver
Driver
G
G
U V W
M

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