QJ71C24N-R2 datasheet(20/24 Pages) OMRON

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EJ1

Safety Precautions

!CAUTION

Precautions for Safe Use

Observe the following points to ensure safe operation.

1. The product is designed for indoor use only. Do not use the

product outdoors or in any of the following locations.

• Places directly subject to heat radiated from heating equipment

• Places subject to splashing liquid or oil atmosphere

• Places subject to direct sunlight

• Places subject to dust or corrosive gas (in particular, sulfide gas

or ammonia gas)

• Places subject to intense temperature change

• Places subject to icing or condensation

• Places subject to vibration or strong shocks

2. Use and store the product within the rated temperature and

humidity ranges. Provide forced-cooling if required.

3. To allow heat to escape, do not block the area around the product.

Do not block the ventilation holes on the product.

4. Be sure to wire properly with correct polarity of terminals.

5. Use specified size (M3, width 5.8 mm or less) crimped terminals

for wiring. To connect bare wires to the terminal block, use copper

braided or solid wires with a gage of AWG22 to AWG14 (equal to

cross-sectional area of 0.326 to 2.081 mm2) for power supply lines

and a gage of AWG28 to AWG16 (equal to cross-sectional area of

0.081 to 1.309 mm2). (The stripping length is 6 to 8 mm.)

6. Do not wire terminals that do not have an identified use.

7. Allow as much space as possible between the product and

devices that generate a powerful high-frequency or surge.

Separate the high-voltage or large-current power lines from other

lines, and avoid parallel or common wiring with the power lines

when you are wiring to the terminals.

8. Use the product within the rated load and power supply.

9. Make sure that the rated voltage is attained within two seconds of

turning ON the power.

10.It takes 30 minutes from the time the Temperature Controller is

turned ON until the current temperature is displayed. Always turns

ON the power supply at least 30 minutes before starting

temperature control.

11.The switch or circuit breaker must be within easy reach of the

operator, and must be marked as a disconnecting means for this

unit.

12.Do not use paint thinner or similar chemical to clean with. Use

standard grade alcohol.

13.Design the system (e.g., the control panel) allowing leeway for the

delay required before product outputs are valid after turning ON

power to the product.

14.Never touch the electronic components, connectors, or patterns

on product boards with your bare hands. Always hold the product

by the case. Inappropriately handling the product may

occasionally damage internal components due to static electricity.

15.Use a switch, relay, or other device with contacts to turn OFF the

power supply quickly. Gradually lowering the voltage of the power

supply may result in incorrect outputs or memory errors.

16.Do not touch the electronic components with your hands or subject

them to shock when removing the terminal block.

17.Connect only the specified number of products in only a specified

configuration.

18.Mount the product to a DIN Rail mounted vertically to the ground.

19.Always turn OFF the power supply before wiring the product,

replacing the product, or changing the product configuration.

20.Attach the enclosed cover seal to the connector opening on the left

end product during installation.

21.Do not use port B on the end product when using port C on HFUs.

22.Install the product only after reading the manual provided with the

End Unit.

Do not touch the terminals while power is being supplied.

Doing so may occasionally result in minor injury due to

electric shock.

Use a power supply that complies with the reinforced

insulation specified in IEC 60664 for the EJ1 external

power supply or the power supply connected to the EJ1.

If non-compliant power supplies are used, electric shock

may occasionally result in minor injury.

Do not allow pieces of metal, wire clippings, or fine

metallic shavings or filings from installation to enter the

product. Doing so may occasionally result in electric

shock, fire, or malfunction.

Do not use the product where subject to flammable or

explosive gas. Otherwise, minor injury from explosion

may occasionally occur.

Never disassemble, modify, or repair the product or

touch any of the internal parts. Minor electric shock, fire,

or malfunction may occasionally occur.

Tighten the terminal screws to between 0.40 and

0.56 N·m. Loose screws may occasionally result in fire.

For the EJ1C-EDUC-NFLK (model with connector

terminal block), tighten the terminal block screws to

between 0.50 and 0.60 N·m.

Set the parameters of the product so that they are

suitable for the system being controlled. If they are not

suitable, unexpected operation may occasionally result

in property damage or accidents.

A malfunction in the product may occasionally make

control operations impossible or prevent alarm outputs,

resulting in property damage. To maintain safety in the

event of malfunction of the product, take appropriate

safety measures, such as installing a monitoring device

on a separate line.

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