S8AS datasheet(25/26 Pages) OMRON

25 / 26 page

S8AS

Insulation Resistance Test

• When testing the insulation resistance, use a DC resistance meter

at 500 VDC.

• To prevent damage, always short branch output terminals (+/−), all

I/O terminals, and communications terminals before testing.

Output Voltage Adjustment

• If the output voltage is set to less than 20 V (default setting), the

undervoltage alarm may be activated.

• Do not exceed the rated output capacity and rated total output

current after adjusting the output voltage.

• The output voltage may increase beyond the allowable voltage

range rated voltage +10% when the V.ADJ adjuster is used. When

adjusting the output voltage, check the output voltage of the power

supply to make sure that the load is not damaged.

Displaying the Output Voltage

The voltage detection is performed on the voltage after AC/DC

conversion in the interval circuits. The displayed voltage will be

somewhat different from the value at the output terminals of the power

source due to internal voltage drop. To confirm correct output

voltages, measure the voltages at the branch output terminals.

No Output Voltage

The internal circuit's overcurrent protection or overvoltage protection

may operate. Alternatively, the latch protection circuit may operate if

there is a lightning inrush or other large voltage applied to the input.

Contact your OMRON representative if there is still no output voltage

after checking the following two points:

• Checking Overcurrent Protection

Check whether the load is in an overcurrent or short-circuited state.

Remove the wires to the load before checking.

• Checking Overvoltage Protection and Latching Protection

Turn the power supply OFF and leave it OFF for at least 3 minutes,

then turn it ON again.

Startup Time

At startup, the S8AS will check hardware and software before starting

the operation of branch outputs. A time of approximately 3 seconds is

required for these self-diagnostic functions. Take this time into

account when designing the system.

External Tripping Input

• Wire the polarity of the external tripping input correctly.

• After completing wiring, confirm that operation is correct.

Tripping Alarm Output,

Undervoltage Detection Output, Maintenance

Forecast Monitor Output,

and Over-temperature Output

Photoswitch outputs: 30 VDC max., 50 mA max., residual voltage

when ON: 2 V max., leakage current when OFF: 0.1 mA max.

• Wire all output signal circuits correctly.

• Internal current control circuits are not provided internally for output

signals. Do not allow the output current to exceed 50 mA.

• After completing wiring, confirm that the circuits operate correctly.

Prohibition of Parallel Connection

Do not connect branch outputs from the S8AS in parallel. Also, do not

connect the branch outputs in parallel with branch outputs of other

S8AS Power Supplies.

Connecting Backup Devices

Do not connect a battery or other backup power supply to the output

of the Product.

Harmonic Current Suppression Circuit

A harmonic current suppression circuit is built into the Power Supply.

This circuit can create noise when the input is turned ON, but it will

last only until the internal circuits stabilize and does not indicate any

problem in the Product.

Connections cannot be made in parallel

with other branch output circuits.

S8AS

S8AS Datasheet(PDF) 25 Page - Omron Electronics LLC

S8AS Datasheet(HTML) 25 Page - Omron Electronics LLC

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Datasheet Download

Link URL