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Chapter
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F3SJ-A
User’s Manual
System Configuration and Functions
Waveform of safety outputs
When the F3SJ is receiving light, the safety outputs cyclically turn OFF as shown below to test the
output circuit. When this OFF signal is fed back, the output circuit is diagnosed as normal. If the output
signal does not include an OFF pulse signal, the receiver diagnoses a failure in the output circuit or
wiring, and it enters lockout state. (See the table below.)
Auxiliary Output (Non-Safety Output)
The auxiliary output is used to monitor the status of the F3SJ. This output can be connected to a
device such as a relay, indication lamp, programmable controller, etc.
Do not use the auxiliary output or external indicator output for safety applications.
Human body may not be detected when F3SJ fails, resulting in serious injury.
The output operation mode for auxiliary output 1 is as follows:
•Auxiliary output 1: Inverse of safety output signals
Auxiliary output 1 is load current 300mA max.
Safety output 1,2
OFF signal
ON
OFF
About 65 s
About 140 s
About 15ms
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