G3NA

13

Safety Precautions

!CAUTION

■ Precautions for Safe Use

Although OMRON continuously strives to improve the quality and

reliability of our relays, the G3NA contains semiconductors, which

are generally prone to occasional malfunction and failure.

Maintaining safety is particularly difficult if a relay is used outside of

its ratings. Always use the G3NA within the rated values. When

using the G3NA, always design the system to ensure safety and

prevent human accidents, fires, and social damage even in the event

of G3NA failure, including system redundancy, measures to prevent

fires from spreading, and designs to prevent malfunction.

1. G3NA malfunction or fire damage may occasionally occur. Do not

apply excessive voltage or current to the G3NA terminals.

2. Heat Dissipation

• Do not obstruct the airflow to the G3NA or heat sink. Heat

generated from an G3NA error may occasionally cause the

output element to short, or cause fire damage.

• Be sure to prevent the ambient temperature from rising due to

the heat radiation of the G3NA. If the G3NA is mounted inside a

panel, install a fan so that the interior of the panel is fully

ventilated.

• Mount the G3NA in the specified orientation. If the G3NA is

mounted in any other orientation, abnormal heat generation

may cause output elements to short or may cause burning.

• Do not use the G3NA if the heat sink fins are bent, e.g., as the

result of dropping the G3NA. Heat dissipation characteristics will

be reduced, possibly causing G3NA failure.

• Apply a thin layer of Momentive Performance Materials’s

YG6260 or Shin-Etsu Chemical’s G747, or a similar product to

the heat sink before mounting

• If a material with high thermal resistance, such as wood, is

used, heat generated by the G3NA may occasionally cause fire

or burning. When installing the G3NA directly into a control

panel so that the panel can be used as a heat sink, use a panel

material with low thermal resistance, such as aluminum or steel.

• Use the specified heat sink or one with equivalent or better

characteristics.

3. Wire the G3NA and tighten screws correctly, observing the

following precautions

Heat generated by a terminal error may occasionally result in fire

damage. Do not operate if the screws on the output terminal are

loose.

• Abnormal heat generated by wires may occasionally result in

fire damage. Use wires suitable for the load current.

• Abnormal heat generated by terminals may occasionally result

in fire damage. Do not operate if the screws on the output

terminal are loose.

Tightening Torque

• Abnormal heat generated by terminals may occasionally result

in fire damage. When tightening terminal screws, be sure that

no non-conductive foreign matter is caught in screw.

• For GN3A Relays of 40 A or higher, use crimp terminals of an

appropriate size for the wire diameter for M5 terminals.

• Do not use any wires with damaged sheaths. These may cause

electric shock or leakage.

• Do not place wiring in the same conduit or duct as high-voltage

lines. Induction may cause malfunction or damage.

• Use wires of an appropriate length, otherwise malfunction and

damage may result due to induction.

• Mount the DIN Track securely. Otherwise, the DIN Track may

fall.

• Be sure that the G3NA clicks into place when mounting it to DIN

Track. The G3NA may fall if it is not mounted correctly.

• Do not mount the G3NA when your hands are oily or dirty, e.g.,

with metal powder. These may cause G3NA failure.

• Tighten the G3NA screws securely.

Tightening torque: 0.78 to 0.98 N

⋅m

• Tighten the heat sink screws securely.

Tightening torque: 0.98 to 1.47 N

⋅m

4. Preventing Overheating

When using the High-capacity Heat Sink (Y92B-P250NF), always

use a thermostat or other method to protect from overheating in

the event that the fan stops.

5. Do Not Touch Fan Blades

When the fan is operating, do not touch the fan blades with any

part of your body or allow foreign matter to come into contact with

the blades. Always attach the enclosed finger guard when using

the G3NA.

6. Operating Conditions

• Only use the G3NA with loads that are within the rated values.

Using the G3NA with loads outside the rated values may result

in malfunction, damage, or burning.

• Use a power supply within the rated frequency range. Using a

power supply outside the rated frequency range may result in

malfunction, damage, or burning.

7. Do not transport the G3NA under the following conditions. Failure

or malfunction may occur.

• Conditions under which the G3NA will be exposed to water

• High temperatures or high humidity

• Without proper packing

Touching the charged section may occasionally cause

minor electric shock. Do not touch the G3NA terminal

section (the charged section) when the power supply is

ON. Be sure to attach the cover before use.

The G3NA and heat sink will be hot and may occasionally

cause minor burns. Do not touch the G3NA or the heat

sink either while the power supply is ON, or immediately

after the power is turned OFF.

The internal snubber circuit is charged and may

occasionally cause minor electric shock. Do not touch the

G3NA's main circuit terminals immediately after the

power is turned OFF.

Be sure to conduct wiring with the power supply turned

OFF, and always attach the terminal cover after

completing wiring. Touching the terminals when they are

charged may occasionally result in minor electric shock.

Do not apply a short-circuit to the load side of the G3NA.

The G3NA may rupture. To protect against short-circuit

accidents, install a protective device, such as a quick-

burning fuse, on the power supply line.

Screw size

Tightening torque

M4

1.2 N

⋅m

M5

2.0 N

⋅m