Precautions For Safe Use - Omron S8AS User Manual

The S8AS Smart Power Supply combines the highly reliable S8VS Switch Mode Power Supply with the S8M
Digital Multicircuit Protector into a single unit to reduce both wiring and space requirements. The built-in digital
circuit protector uses semiconductor relays to close and trip circuits, and does not contain any contact
switching mechanisms, as normal circuit protectors do.
Observe the following precautions when introducing the S8AS into or using the S8AS in any system.
■ Installation and Storage Environment
1. Store the Product at an ambient temperature of –25 to 65°C and relative humidity of 25% to 90%.
2. To maintain performance of the maintenance forecast monitor, make sure the following conditions are
satisfied for long-term storage.
• For storage exceeding three months, keep the Product at a temperature of –20°C to 30°C and a
humidity of 25% to 70%.
3. Internal parts may occasionally be deteriorated or damaged. Do not use the Product in conditions
exceeding the derating curve (in portion (1) of the derating curve on page xiv).
4. Internal parts may possibly be damaged. Do not use a current that exceeds the rated total output current.
If temporary peak currents occur repetitively, design the system so that the peak currents do not exceed
the rated total output current.
5. The surrounding air temperature to comply with UL508 and UL60950-1 is 25°C.
6. Use the Product where the relative humidity is 25% to 85%.
7. Do not use the Product where it would be subjected to direct sunlight.
8. Do not use the Product where it would be subjected to the possibility of penetration of liquid, foreign
substance, or corrosive gas.
9. Do not use the Product where it would be subjected to shock or vibration. A device such as a contact
breaker may be a vibration source. Set the Product as far as possible from possible sources of shock or
vibration. Additionally, install a PFP-M End Plate on each end of the Product after mounting it to a DIN
Rail.
10. Use a DIN Rail made of steel. If an aluminum DIN Rail is used, vibration or shock may cause the
formation of metal dust due to abrasion of the aluminum.
11. Poor heat dissipation may deteriorate or damage internal parts. Do not loosen the screws on the side of
the Product.
12. If the Product is used in an area with excessive electronic noise, be sure to separate the Product as far as
possible from the noise sources.
13. Cutoff performance is guaranteed according to the ambient operating temperature. Use the Product within
the derating range. Refer to the Derating Curve on page xiv.
14. Poor heat dissipation resulting from improper installation conditions may occasionally deteriorate or
damage internal parts and also cause the maintenance forecast monitor function to not operate properly.
Do not use any mounting orientation other than a standard one.
Standard Mounting
15. Do not connect a battery or other backup power supply to the output of the Product.
16. To comply with UL standards, insert a fast-breaking, UL-approved fuse rated at 20 A into each input line.
17. Although some inverters have an output frequency of 50/60 Hz, they may cause internal temperatures to
rise, possibly resulting in burning, if they are connected as the power source for the S8AS. Do not use the
output from an inverter as the power source for the S8AS.
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Precautions for Safe Use

Face-up Mounting