Omron F3SN-B P Series, Instruction Manual

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B-ii
Notice
Give sufficient safety considerations and make enough allowance with regard to ratings and functions
of the system when using the F3SN-B under following conditions:
(1) Conditions or environment not specified in this manual
(2) Applications to devices and facilities requiring special safety precautions, such as; nuclear energy control,
railway, aircraft, vehicles, combustion facility, medical system, space development, large amusement
machines, etc.)
Precaution on Safety
General conventions for safe use
The following conventions are used for precautionary items in this manual in order to ensure safe and
proper use of the F3SN-B. Items listed here are critical for safety and must be heeded at all times.
WARNING
Indicates a potentially hazardous situation, which, if not avoided, could result in death or serious
injury.
Indicates prohibited actions.
WARNING
Do not use the F3SN-B on machines that cannot be stopped by electrical control in case of an emergency, such as a
pressing machine with full-rotation clutch system. Serious injury may result if the machine does not stop before someone
reaches the hazardous part. (Chapter 2-1)
Install protective structures around the machine so that you must pass through the detection zone of the F3SN-B to reach
a hazardous part of the machine. Install the F3SN-B so that some part of the operator's body remains in the detection zone
at all times when the operator works in a hazardous area. (Chapter 2-1)
The switch to reset the interlock condition must be installed so that the entire hazardous area is visible and free of
personnel, also the switch must not be able to be operated from within the hazardous area. (Chapter 2-1)
Do not use the F3SN-B in flammable or explosive environments. Failure to do this may cause an explosion. (Chapter 2-1)
The F3SN-B does not offer protection to the operator’s body from projectiles exiting the hazardous area. Proper means of
mechanical guarding must be provided to ensure protection from these potentially hazardous projectiles. (Chapter 2-1)
Always maintain the safe calculated distance between the F3SN-B and the hazardous part of a machine to avoid serious injury that
may be caused by reaching the hazard before the machine has stopped. (Chapter 2-1)
Do not install the F3SN-B in a location where it can be affected by wall reflections to avoid detection failure which may
result in serious injury. (Chapter 2-1)
Use the emitter and receiver in proper arrangement to avoid creation of undetectable zones. The set type of the emitter
and receiver must be the same. (Chapter 2-1)
Be sure to securely fasten the F3SN-B to the machine and tighten the cable connector. (Chapter 2-1)
When using multiple sets of F3SN-B, arrange them to prevent mutual interference. (Chapter 2-1)
Do not short-circuit the outputs to the +24 V. Doing so will cause the output to be always ON, creating a hazardous
situation. Connect the 0V line of the power supply directly to protective earth to prevent the earth fault. Otherwise the earth
fault causes the outputs to be ON.(Chapter 2-4)
Connect loads between the output and 0V line. (PNP output)
Connecting loads between the output and +24V line will reverse the operation mode and the machine will be ON when it
is light-interrupted. (Chapter 2-4)
Always use the two OSSD outputs to configure the safety system.
Using only one OSSD of the safety system may result in serious injury when there is an output circuit failure. (Chapter 2-4)
Do not connect any of the F3SN-B lines to a DC power supply with more than 24VDC+10% or to an AC power supply to
avoid the danger of electric shock. (Chapter 2-4)