S8VK-R

9

Safety Precautions

Warning Indications

Meaning of Product Safety Symbols

!CAUTION

Risk of a mild burn on rare occasions. Do not touch

the device unit while it is powered on or immediately

after the power is turned off.

The ignition may accidentally be caused. Tighten

terminal screws to a specified torque 4.43 to

5.31 lb-in (0.5 to 0.6 N·m).

Minor electric shock, fire, or Product failure may

occasionally occur. Do not allow any pieces of metal

or conductors or any clippings or cuttings resulting

from installation work to enter the Product.

Risk of product damage. Do not reverse the polarity

of the device input terminals when wiring.

Risk of internal component deterioration and

damage. Do not connect an AC power supply.

Minor electric shock, fire, or Product failure may

occasionally occur. Do not disassemble, modify, or

repair the Product or touch the interior of the

Product.

Wiring

• Minor fire may possibly occur. Ensure that input and output

terminals are wired correctly.

• Increases in the temperature of internal parts resulting from

heating of wiring materials may result in deterioration or damage to

parts. Use wiring materials suitable to the current being used. The

following wiring materials, torque and strip length are

recommended to prevent heating and possible fires in wiring

materials.

• On rare occasions there is a risk of internal element deterioration

and damage if use is continued in a short-circuit or over-current

state.

• Do not apply more than 75N force to the terminal block when

tightening it.

• Use within a range that does not exceed the output current rating.

When a load short-circuit occurs, the short-circuit current of two

power supply units flows. Use output wiring that can handle the

short-circuit current of two units. If the wiring does not have

sufficient current capacity, connect a fuse on the output side.

Recommended fuse S8VK-R10: 15 A, S8VK-R20: 30 A Fast-

acting type

If the current rating of the output terminal is exceeded on the S8VK-

R20, always use multiple terminals simultaneously.

• Risk of damage to internal components. Do not use in a state that

exceeds the rated current of the signal output.

Installation Environment

• Do not use the Redundancy Unit in locations subject to shocks or

vibrations. In particular, install the Redundancy Unit as far away as

possible from contactors or other devices that are a vibration

source.

• Install the Redundancy Unit well away from any sources of strong,

high-frequency noise and surge.

Ambient Operating and Storage Environments

• Store the product with ambient temperature −40 to 85°C, and

relative humidity 0 to 95%.

• The internal parts may occasionally be deteriorated or broken. Do

not use at a temperature that exceed the operating temperature

range for the mounting type.

• Use the product where the relative humidity is 0 to 95%.

• Avoid places where the product is subjected to direct sunlight.

• Avoid places where the product is subjected to penetration of

liquid, foreign substance, or corrosive gas.

• Avoid places subject to shock or vibration.A device such as a

contact breaker may be a vibration source.

Set the Redundancy Unit as far as possible from possible sources

of shock or vibration.

• If the Redundancy Unit is used in an area with excessive electronic

noise or surge, be sure to separate the Redundancy Unit as far as

possible from the noise sources.

CAUTION

Indicates a potentially hazardous

situation which, if not avoided, may

result in minor or moderate injury or in

property damage.

Precautions for

Safe Use

Supplementary comments on what to

do or avoid doing, to use the product

safely.

Precautions for

Correct Use

Supplementary comments on what to

do or avoid doing, to prevent failure to

operate, malfunction or undesirable

effect on product performance.

Used to warn of the risk of minor injury caused by

high temperatures.

Used for general mandatory action precautions

for which there is no specified symbol.

Use to indicate prohibition when there is a risk of

minor injury from electrical shock or other source

if the product is disassembled.

Precautions for Safe Use

Terminal

Model

Recommend Wire Type

AWG

Solid wire

Twisted wire

Input

S8VK-R10

S8VK-R20

Output

S8VK-R10

S8VK-R20

Status

contact

S8VK-R

@@ AWG16

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All

terminals

wires to be stripped: 8 mm