Mitsubishi Electric FR-A800, Instruction Manual

Page: 84 / 1042

Control circuit Installation and wiring
2 - 54
2.6.7 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 page
2-56.
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.
SIC
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
Tab. 2-21: Safety stop signal
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.