Omron F3SJ-A series User Manual page 8

Introduction
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 "bend" the detection zone to a 90-degree angle.
Reflector
Perform an inspection for all F3SJ as described in "Chapter 5 Checklists". When using series connections,
perform inspections for every connected F3SJ.
For wiring
Connect the load between the output and 0V line (PNP output). Connecting the load between the output and
+24V line will result in a dangerous condition because operation is reversed to "ON when blocked".
Do not short-circuit the output line to the +24V line. Otherwise, the output is always ON. Also, the 0V of the
power supply must be grounded so that output does not turn ON due to grounding of the output line.
Configure the system by using the optimal number of safety outputs that satisfy the requirements of the
necessary safety category.
Do not connect each line of F3SJ to a DC power supply of more than 24VDC+20%. Also, do not connect to an
AC power supply. Failure to do so may result in electric shock.
For the F3SJ to comply with IEC 61496-1 and UL 508, the DC power supply unit must satisfy all of the
following conditions:
• Must be within the rated power voltage (24V DC
• Must have tolerance against the total rated current of devices if it is connected to multiple devices
• Must comply with EMC directives (industrial environment)
• Double or reinforced insulation must be applied between the primary and secondary circuits
• Automatic recovery of overcurrent protection characteristics (reversed L sagging)
• Output holding time must be 20ms or longer
• Must satisfy output characteristic requirements for class 2 circuit or limited voltage current circuit defined by
UL508
• Must comply with laws and regulations, regarding EMC and electrical equipment safety, of the country or
region where the F3SJ is used (Ex: In EU, the power supply must comply with the EMC Directive and the
Low Voltage Directive.)
F3SJ-A
vi
User's Manual
Position with retro-reflection
±
20%)
Reflector
Position with detection zone bent at 90