Omron F3SJ Series, Original Instructions Manual

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158
Chapter
4
Wiring
F3SJ-A
User’s Manual
Wiring/Installation

Power Supply Unit
For the F3SJ to comply with IEC 61496-1 and UL 508, the DC power supply unit must sat-
isfy all of the following conditions:
•Must be within the rated power voltage (24V DC
±
20%)
•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 (Refer to remarks)
• 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.)
(Remarks)
To prevent a fire, the secondary circuit of the power supply must satisfy either of the following
conditions in accordance with UL 508:
• As with secondary winding of isolation transformer, there must be a limited current voltage circuit to
which isolated power supply provides power, and the "current is limited to 8A max. (including short-
circuit)" or "circuit protection such as a fuse is used to limit the current, which has a rating of 4.2A
max." (24VDC power supply).
Recommended power supply: OMRON S82K (15 W, 30 W, 50 W, 90 W type), S8VS (60 W type),
S82J (10 W, 25 W, 50 W type)
These products are approved by UL listing (UL508, class 2 power supply), CE marking compatible
(EMC/Low Voltage Directive).
• Class 2 power supply unit complying with UL 1310, or a circuit using 2 transformers complying with
UL 1585 as a power supply.