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viii

Introduction

F3SG-R

User’s Manual

Install F3SG-R so that it is not affected by reflective surfaces. Failure to do so may hinder

detection, resulting in serious injury. For an installation distance from reflective surfaces, see 4-1-

3. Distance from Reflective Surfaces.

When using more than 1 set of F3SG-R in adjacent areas, the emitter of one F3SG-R may

interfere with the receiver of the other, causing the safety functions to stop working properly.

Install and configure them so that mutual interference does not occur.

Make sure that foreign material such as water, oil, or dust does not enter the F3SG-R or the

connector while the cap or the cover of the DIP Switch is removed.

To change the response time, calculate the safety distance based on the setting. Otherwise, the

machine may not stop before a person reaches the hazardous part, resulting in serious injury.

Do not use the sensor system with mirrors in a retro-reflective configuration as shown

below.Doing so may hinder detection. It is possible to use mirrors to alter the detection zone to a

90-degree angle.

Perform an inspection for all F3SG-R as described in Chapter 6 Checklists. When using cascade

connections, perform inspections for every connected F3SG-R.

For wiring

When using the PNP output, connect the load between the output and 0 V line. When using the

NPN output, connect the load between the output and +24 VDC line. Connecting the load

between the output and a different power supply line from the above will result in a dangerous

condition because the operation mode of safety output is reversed to "Dark-ON".

When using the PNP output, do not ground +24 VDC line. When using the NPN output, do not

ground 0 V line. Otherwise, a ground fault may turn the safety output ON, resulting in a failure of

stopping the machine.

Configure the system by using the optimal number of safety outputs that satisfy the requirements

of the necessary safety category.

Reflector

Position with retro-reflection

Position with detection zone bent at 90

Omron F3SG series User Manual

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