Mitsubishi Electric FR-D720S SC EC, Instruction Manual

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Control circuit specifications Wiring
3 - 24
Safety stop function operation
At an internal safety circuit fault, E.SAF or E.CPU is displayed on the operation panel.
SA is displayed on the operation panel when both the S1 and S2 signals are in the open
state without any internal safety circuit fault (E.SAF, E.CPU).
ON: Transistor used for an open collector output is conducted.
OFF: Transistor used for an open collector output is not conducted.
N/A denotes a condition where circuit fault does not apply.
For more details, refer to the “FR-D700 SC EC – Safety stop function instruction manual (BCN-
A211508-005)".
Input Power
Input Signal Internal
Safety
Circuit
Output Signal
Operation State
S1-SC S2-SC
SAFE SAFE2
OFF — — — OFF OFF
Output shutoff
(Safe state)
ON
Short Short
No failure OFF ON Drive enabled
Detected OFF OFF
Output shutoff
(Safe state)
Open Open
No failure ON ON
Output shutoff
(Safe state)
Detected OFF OFF
Output shutoff
(Safe state)
Short Open N/A OFF OFF
Output shutoff
(Safe state)
Open Short N/A OFF OFF
Output shutoff
(Safe state)
Tab. 3-16: Description of Safety stop function operation
b
CAUTION:
To use the safety stop function, connect the FR-D700 SC source-logic safety terminal
models only to a safety relay module. If the FR-D700 sink-logic safety terminal models
and the FR-D700 SC source-logic safety terminal models are connected, the safety
stop function does NOT operate.