A22E

15

Safety Precautions

Be sure to read the precautions for All PushButton Switches in the website at:http://www.ia.omron.com/.

Indication and Meaning for Safe Use

If the Operation Unit is separated from the Socket Unit, the

equipment will not stop, creating a hazardous condition.

Secure the lever on the Socket Unit by using the

A22Z-3380 Lock Plate so that the Operation Unit cannot be

easily separated from the Socket Unit.

(Refer to “Mounting the Lock Plate” at the below.)

Mounting the Lock Plate

1. Confirm that the lever on the Mounting Latch is on the side where

the Operation Unit is secured and then insert the protrusion on the

Lock Plate into the hole in the lever on the Mounting Latch.

2. Press the hole on the Lock Plate onto the protrusion on the

Mounting Latch until it clicks into place.

Wiring

• Terminal screws must be Phillips or slotted M3.5 screws with a

square washer.

• The tightening torque is 1.08 to 1.27 N·m.

• Single wires, stranded wires, and crimp terminals can be

connected to the Switch.

• Applicable Wiring Materials:

Twisted strands: 2 mm2 max.

Solid wire: 1.6 mm dia. max.

• After wiring the Switch, maintain an appropriate clearance and

creepage distance.

LED Lamps

• The LED current-limiting resistor is built-in, so internal resistance

is not required.

• If commercially available LEDs are used, select the ones that meet

the following conditions:

Base: BA9S/13

Overall length: 26 mm max.

Power consumption: 2.6 W max.

When DC-specific LEDs are used, wire the Switch so that the X1

terminal is positive.

• Mis-lighting of the LED

The LED lights with approx. 0.1 mA or less of micro-current. Take

a countermeasure like adding a resistor to prevent mis-lighting in

parallel to the LED.

The micro-current varies with the machine (leak current or stray

capacity between cables, etc.). Select resistance value and

allowable power consumption that meet the actual current.

• Do not use a lamp that does not satisfy the rating.

Using the Microload

Contact failure may occur if a Switch designed for a standard load is

used to switch a microload. Use Switches within the application

ranges shown in the following graph. Even within the application

range, insert a contact protection circuit, if necessary, to prevent the

reduction of life expectancy due to extreme wear on the

contacts caused by loads where inrush current occurs when the

contact is opened and closed.

The minimum applicable load is the N-level reference value. This

value indicates the malfunction reference level for the reliability

level of 60% (

λ 60) (conforming to JIS C5003).

The equation,

λ 60 = 0.5 x 10−6/time indicates that the estimated

malfunction rate is less than 1/2,000,000 with a reliability level of 60%.

Be sure to read the "Safety Precautions" on page 37.

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.

Caution

Precautions for Correct Use

CAUTION

Lever

Operation

Unit

Mounting Latch

Lock Plate

1

2

Naked Crimp Terminals

8 mm max.

16.0 mm max.

8 mm dia. max.

16.0 mm max.

Crimp Terminals with

Insulating Sheaths

20.2 mm max.

8 mm max.

20.2 mm max.

8 mm dia. max.

X1

X2

LED

lamp

R:10k

Ω (1W)

Bleeder resistor

(Circuit example)

In case of using 24 VAC/VDC, Direct lighting

Invalid

area

0.1

1

10

100

1,000

10 mA

1 mA

5

12

24

30

0.16 mA

1.6 mA

100 mA

0

Microload area

Area of

use

Standard

load area

Current (mA)