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

      Item F3SN-A Series F3SN-B Series
      Type
      (Categories based on
      IEC 61496-1)      		 Type 4 Type 2
      Applicable categories
      (Categories based on
      EN 954-1)      		 B, 1, 2, 3, and 4 B, 1, and 2
      Effective aperture angle
      (I.e., directional angle)
      (Requirements based on
      IEC 61496-2)      		 ±2.5° max, ±5° max,
      Self-test Frequency of
      execution      		 Once per 10 to 15.5 ms max. Once per 1 s max.
      Items
      monitored      		 Emitter
      CPU runaway
      Emitter element damage
      Emitter circuit damage
      Cable disconnection and short-circuiting

      Receiver
      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.
      CPU 2 (circuit redundancy) 2 (circuit redundancy)
      Series connection and
      mutual interference 
      prevention      		 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 height 189 to 1,822 mm 217 to 1,807 mm
      Smallest detectable object 14-mm dia., 25-mm dia., 40-mm dia., 70-mm dia. 25-mm dia., 40-mm dia., 70-mm dia.
      Total failures No hazard for up to 3 failures No hazard for up to 1 failures
      Safety-related
      Functions      		 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      		 Supported Not supported