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F3S-B
DESCRIPTION
1-1 Basics
WARNING
Use the F3S-B only in category 2, 1, or B appli-
cations as defined in pr EN 1050 or EN 954-1.
Do not use the F3S-B in category 3 or 4 sys-
tems.
The F3S-B Safety Light Curtain is a multi-axis
transmissive-type light array which uses
microprocessor technology.
It is used to stop a machine before the hazard is
reached when any part of the detection zone is
interrupted.
It consists of an IR (infrared) Emitter and a Re-
ceiver. Optional devices are available for the sys-
tem with further safety requirements.
1-3 Standard Functions
1-3-1 Start/restart interlock
This function keeps the F3S-B in the OFF-state after power ON and every interruption of the detection
zone. To reset this condition, 17 VDC to Vs (nominal 24 VDC) must be applied to the Interlock selection
input of the emitter for 15 to 2500 ms. Otherwise the OFF-state continues even if nothing interrupts the
detection zone.
This function can be selected/deselected as follows;
Active mode: By not connecting the Interlock selection input line or by connecting it to 0V line before
turning the power ON.
Inactive mode (Automatic start): By connecting the Interlock selection input line to the Instability output
line before turning the power ON (see "2-3-2 Wiring diagram").
Note: The switch to reset the start/restart interlock condition has to be installed out of the hazardous area.
When the start/restart interlock is reset, the hazardous area must be visibly free.
1-3-2 Testing
Self-test after Power-ON
After the power is turned ON, the F3S-B performs a complete self-test within 2 seconds. If no failure is
found, the F3S-B goes into normal operation.
Self-test during Normal Operation
The F3S-B periodically checks all safety related functions at least every 2 seconds. All components and
memories are tested in this periodic check.
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1-2 Features
• Self-test
• Optical resolution of 30, 55 or 80 mm in diame-
ter
• Detection distance from 0.3 to 5.0 m
• Max. protective height of 1,650 mm
• TÜV approvals and CE marking
• UL listed to U.S. and Canadian safety standard
• IP 65 enclosure rating
• Start/restart interlock function selectable
• Blanking, Start Interlock, Relay monitoring func-
tions optionally available
• Series connection types available
Section 1
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