IP-47 datasheet(11/92 Pages) ETC

11 / 92 page

Prior to Use

Auto Switches Common Specifications 3

Refer to the Auto Switch Precautions on pages 8 to 12 before using auto switches.

A switch that detects the magnetic field by the MR element and incorporates the judgement circuit to turn ON or OFF the out-

put regardless of the contact or non-contact of the mechanical contact like transistor (non-contact part).

A current that flows to operate the internal circuit when the ON-OFF output is OFF. In particular, if this leak current exceeds the

detection current in the 2-wire type auto switch or PLC, this may cause reset fault. So, take great care when selecting a device.

A switch that uses the reed switch to detect the magnetic field and turn ON or OFF the output by the contact or non-contact

of the mechanical contact (contact part is provided like relay or limit switch).

A load that has the coil. The connection target of the auto switch is a relay.

A minimum bending radius (reference value) of the lead wire when the lead wire is secured and constructed (oscillation or ro-

tation is not considered).

(As the temperature or current value conforms to the auto switch specifications, this lead wire bending radius differs from the

value disclosed by the electric wire manufacturer.)

A structure, in which the lead wire of the auto switch is taken out in the horizontal direction when the cylinder is laid out hori-

zontally (cylinder rod is horizontal), is called “in-line entry”. A structure, in which the lead wire is taken out in a direction per-

pendicular to the cylinder axis center, is called “perpendicular entry”.

Meaning

Term

Minimum Stroke for

Auto Switch Mounting

Internal voltage drop

Solid state auto switch

Leak current

Reed auto switch

Induction load

Recommended lead

wire bending radius

Electrical entry

2-Color Indicator

Load

Load current

Enclosure

First characteristic numeral

Second characteristic numeral

Example) In the case of stipulated as IP65, we can know the degrees of protection is dusttight and water jet-

proof on the grounds that the first characteristic numeral is 6 and the second characteristic numeral

is 5 respectively, that gives it will not be adversely affected by direct water jets from any direction.

Non-protected

Protected against vertically falling water drops

Protected against vertically falling water drops when enclosure tilted

up to 15°

Protected against rainfall when enclosure tilted up to 60

Protected against splashing water

Protected against water jets

Protected against powerful water jets

Protected against the effects of temporary immersion in water

Protected against the effects of continuous immersion in water

Second Characteristics:

Degrees of protection against water

Non-protected

Protected against solid foreign objects of 50 mm ø and greater

Protected against solid foreign objects of 12 mm ø and greater

Protected against solid foreign objects of 2.5 mm ø and greater

Protected against solid foreign objects of 1.0 mm ø and greater

Dust-protected

Dusttight

First Characteristics:

Degrees of protection against solid foreign objects

A minimum stroke value of the auto switch that can be mounted on the cylinder.

The minimum stroke is determined by the specification limit (auto switch operation or position setting ability, etc.) and physi-

cal limit (mechanical interference associated with the auto switch mounting).

Note that the catalog shows the value assuming that the position detection is performed at the stroke end and this value

does not consider the adjustment allowance.

When an adjustment allowance is needed, such as detection before the stroke, a value is set that this adjustment allowance

is added to the minimum stroke.

A voltage that is applied to the portion between the COM and signal line when the auto switch is ON.

As only a value that the internal voltage drop is subtracted from the power supply voltage is applied to the input side of the

PLC, the detection fault (incorrect input) may occur if this value is lower than the minimum operating voltage. So, take great

care when selecting a device.

As the end part of the auto switch operating range (boundary between ON and OFF) is an area where is susceptible to the

external disturbance or stroke change during cylinder operation, this function is intended to quickly and properly make the

setting at the center of the operating range where the stable operation can be obtained by changing the operation indication

color of the auto switch.

A device that is connected to the output of the auto switch so as to do any work is called “load”.

For example, the load is a relay or PLC, etc.

To check the operation of the auto switch, a device equivalent to the load (such as resistor, etc.) is connected.

A current that flows to the load when the ON-OFF output is ON.

A class of protection against solid or water entry of the electrical machinery and apparatus specified in IEC60529.

1586

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