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FAQ02310 of Safety Sensors FAQ

FAQ No. FAQ02310

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What are the main differences between F3SN-A Safety Light Curtain and F3SN-B?


ItemF3SN-A SeriesF3SN-B Series
(Categories based on
IEC 61496-1)
Type 4Type 2
Applicable categories
(Categories based on
EN 954-1)
B, 1, 2, 3, and 4B, 1, and 2
Effective aperture angle
(I.e., directional angle)
(Requirements based on
IEC 61496-2)
±2.5° max,±5° max,
Self-testFrequency of
Once per 10 to 15.5 ms max.Once per 1 s max.
CPU runaway
Emitter element damage
Emitter circuit damage
Cable disconnection and short-circuiting

CPU runaway
Power supply and circuit damage
Receiver element damage
Receiver circuit damage
External light interference received
Output drive circuit damage
Cable disconnection and short-circuiting
Same as at left.
CPU2 (circuit redundancy)2 (circuit redundancy)
Series connection and
mutual interference
Up to 3 Sets (total optical axes: 240) can be connected in series.
Mutual interference prevention only when series connection is used.
Series connection is not possible.
No mutual interference prevention.
Protective height189 to 1,822 mm217 to 1,807 mm
Smallest detectable object14-mm dia., 25-mm dia., 40-mm dia., 70-mm dia.25-mm dia., 40-mm dia., 70-mm dia.
Total failuresNo hazard for up to 3 failuresNo hazard for up to 1 failures
Interlock Function
Fixed Blanking Function
Floating Blanking Function
External Device Monitoring
Interlock Function
External Device Monitoring
Output operation mode
for auxiliary output
Can be set with F39-MC11 Setting Console.Always Dark-ON
Use of F39-MC11
Setting Console
SupportedNot supported

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