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2.6.8
Safety stop function
Function description
The terminals related to the safety stop function are as follows.
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.
SIC
Output terminal used for fault detection and fault indication
display.
So (SO)
The terminal is ON (conducted) while no internal safety circuit
*2
failure
exists.
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 enable the safety stop
function, remove all the shorting wires, and then connect a 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.
NOTE
• Terminal So (SO) can be used to display a fault indication and to prevent restarting of the inverter. The signal output from
terminal So (SO) cannot be used to input a safety stop signal to other devices.
62
2. INSTALLATION AND WIRING
2.6 Control circuit
Terminal function description
Status of both the circuit between terminals S1 and SIC and
the circuit between terminals S2 and SIC
Open: Safety stop is activated.
Shorted: Safety stop is not activated
OFF: Internal safety circuit fault
ON: No internal safety circuit failure
*2
*2
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