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F3SG-SR
User’s Manual
Chapter2 Self-Test
System Operation and Functions
E
2-5-1-2. Waveform of safety outputs
When the safety outputs are in the ON state, they are cyclically turned 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 due to short-circuit, etc, the receiver diagnoses a failure in
the output circuit or wiring, and it enters the LOCKOUT state.
OSSD 1
ON
OFF
OSSD 2
ON
OFF
Approx. 90 to 240 ms
Approx.
45 to 120ms
*1. Approx. 15 to 35 ms
*1 *1
Approx. 40 us *4
*4. An OFF pulse signal of safety outputs may extend to about 100 µs
due to the effect of the connected load (mostly capacitive load ).
*2 *3
*2. Signal when in 2-segment or 3-segment cascade.
*3. Signal when in 3-segment cascade.
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