GM-10-2E-GN-K003

Guide Manual

High-vacuum resistance Switch GN■ Standard specification
How to use

Product nameunit : mm

Output mode

GN-PT5M3A

Straight
touch type

GN-PT5M3A-R

Repeatability*10.003

GN-BP5MA
GN-BP5MA-R
GN-BP161B

Contact force

1.5

Cable direction

Straight
90°(-R)

0.5N

Straight

0*2

B : NC

GN-CSK141B

Angledtouch type

Pretravel

about 0.3

A : NO

GN-PT5M3B
GN-PT5M3B-R

Stroke0.01
A : NO0.01

B : NC90°(-R)

5.0

0.8N

1.0

about 0.3

1.0N

2.9

about 0.2

1.5N

Straight
Straight90°(-R)
Straight*1 Both On→Off, Off→On/ 0.003 (range)(At operating speed 50-200mm/min) *2 Adjust the installed location of the switch by the signal switching point.

■ Common specification
Switch structure

Dry contact

Compatible vacuum

10 Pa

Allowable baking
temperature

120°C

Movement differential

0CablePTFE Core-wire cable0.5m AWG27〈AT01B030〉made by Junkosha Inc.

Oscillation

10 - 55Hz total amplitude 1.5
for X, Y, Z each direction

Impact300m/s2 X,Y,Z each direction

Contact rating

DC5V-DC24V Steady current : 10 mAor less(rush current: 20 mA or less)Standard accessory

Two fixing nuts

-5

Contact life time

3 million(If no specified bungle caused by vibration
and used under voltage and current rating.)

Protective structure

IP40■ How to use■ Circuit diagram

Straight touch type
Normally open (NO)Make contact with detected objects at right angle(within deflection angle ±3°)
GN-PT／GN-CSK

If there is a possibility to press the plunger
to the stroke end, install a stopper separately
to prevent the malfunction.
Shorter than stroke

Workpieces

Slipping after push-in Stopper surfaceAngled touch type
GN-BP

Within 5°

Brown

Brown

BlueBlue

Shorter than stroke
Stopper

Workpieces

Normally closed (NC)

Suitable for angled touch
The degree required to turn on the switch
when the detected object doesn't meet the switch
end fully.

When using for rotation indexing, adjust
the position in consideration ofeccentricity and core blurring accuracyof rotating objects.

■ Tightning torque for case screws and nuts
Product nameScrew / Nut

Tightning torque

GN-PT5M3 A / B

M5×0.5

1N・m

GN-CSK141B

M14×110N・m

GN-BP5MA

M5×0.5

1N・mGN-BP161B

M16×1

12N・m

■Installation■Operating environment

・ Ensure that the threaded part of the switch is not bent during ・Use in the environment in where cuttings and dust don't prevent

installation.

switch movement.

・ When using fixing screws, do not tighten the screws with ・Choose protective cover option in case cutting may damage theexcessive force. That may distort the switch shape or restrict therubber boot.
movement of the plunger. If the fixing screws are damaged, the ・An extra cover is recommended to avoid direct hit by high-pressure
switch can be stuck and difficult to be detached.
coolant or heavy cuttings. Periodically remove chips and dust.
Metal
Apply force to the movable parts only in the direction of・ When the switch with a protective cover iscutting
measurement. Do not apply force in the other direction.
installed horizontally, an extra cover isneeded separately to prevent coolant or
cuttings from entering inside and getting
piled up on the switch.
・ Do not subject cable or core wire cable to excessive pulling or

twisting of 30N or more. The bending raduis should be at least R7.
(except for heat resistance cable)

・ Do not swing the switch by grabbing the wires or its attachingportion when installing (especially when the wire is perpendicular
to the switch).

・When installing it with several cables, hold the switch to avoid thecables from being pulled by weight.

■Rubber for protective structure (boot, seal, O-ring)■Contacting part material

・Rubbers for some products are intended for water-soluble cutting ・Even though hardened stainless steel is used as the material ofoil (Alkaline). For oily, chlorine-base, coolants and otherchemicals, consult METROL for assistance.

the contacting part or stopper surface, they are oxidized and maygather rust under certain conditions.

・ The rubber material for High-accuracy MT-Touch Switch is forboth oily and water-soluble coolants.

・Rubber might be hardened when the ambient temperature is low.

When the contact is depressed for a long period of time, it mighttake longer time for the contact to return the original position.

■How to use
・ Objects shall be aligned straight ahead for the metal bearing ・ Normally-close (NC) type structure might cause chattering

plunger type. (The angle must be within ±3 degrees when highprecision is required such as when using a high precision switch,or when judging existence detection or ON/OFF.)depending on the roughness of workpiece surface andenvironment used (i.e. vibration and contacting speed). In suchcase, please select Normally-open (NO) type switch.

・For slide, deflection angle, or offset contacts, select bearing or ball ・ Use it with the operating speed ofcontact or lever type.

precision is required.

50 to 200 mm/m when・ When the plunger is pushed straight by the detected object, donot allow the object to abruptly slide away, as it will cause theFor the switches without stopper
plunger to snap back. Note that this may cause failure of the・ Do not excessively press the plunger to the stroke end. It may
bearing and built-in switching part.
cause malfunction due to impact.
・ Please also note that forcing the plunger in by your fingers andIf the switch does not feature a stopper surface, stop it before it
letting go (snapping it back out) may also cause failure of thereaches the end of the stroke.
internal contact point.
・ Because offset distance (misalignment with axis of the plunger) ・If there is possibility to press the plunger to the stroke end, installa separate stopper to prevent malfunction.
should be shorter than 5mm, the maximum diameter for detecting
surface is 10mm for the plunger type with plain bearing.
(Feed speed: 50 mm/min, push-in amount: 1 mm)
・ In case the detected surface is angled or ragged, note that theswitch may fail to operate properly or cause malfunction.

・If the contacting part is worn away depending on conditions, thesignal point becomes different. When designing the detected
objects, give consideration to its angle, chamfer and roughness
so that the contacting part holds up longer. (Mainly for slidingtouch type)

Within stroke

Within stroke
StopperWork
piece
Stoppersurface

Work
piece

GM-10-2ES-K001■Electrical・Use under the specified contact rating.
・Chattering may occur when opening and closing the circuit withdry contacts regardless of whether the switch has a snap action
・I/F units with a built-in contact point protection circuit are effective foradverse condition environments where overcurrent may flow. Suchmechanism. Take the first signal as a judgment signal.
environments may involve, regardless of the presence of contact
points, inductive loads with coils (such inductive loads mainly mean Connecting to a load
relay coils, motors, solenoids, many of which require a current of 30mAor more when driven and generate counter-electromotive force when ・ Do not attempt to drive an inductive load directly with theseswitches. Direct driving can damage the switching parts andswitched OFF).
semiconductors of the internal circuitry. In case of driving an・Since operating errors may occur due to induction when high-voltage
inductive load, connect a surge absorber in parallel with the load,lines or power lines are wired within the same conduit or duct asand connect an external load such as a relay or transistor allowing answitch wires, wire them in separate ducts.
adequate flow of current for load driving.
・When using the switch with LED, keep the current below 10mA.

■Confirmation of switch operation
・Connect the switch in the manner shown in the diagram below.

・Limit the LED forward current to about 10mA by inserting a resistor.

Confirming operation by using resistance・ Set the tester to a resistance range of x 10, and connect the minus
lead of the tester to the switch output (brown), and connect the plus
・ Resistance value = (power supply voltage - LED forward voltage) ÷lead of the tester to the switch 0V (blue).
current = (24-2) ÷ 0.01 = 2KΩ The LED forward voltage is about 2V.
・ The deflection of the tester needle indicates around 0W when the・The resistor may be installed on the DC 24V or 0V side.
switch plunger is pushed in and roughly infinity (•) when switch tip is
・ The LED glows when the circuit is closed. Switch operation isreturned.
normal.
・In case of using a sequencer, a resistor is not required if the outflow
current of the sequencer is about 7mA.

Confirming operation by using voltage

・ Operation might not be properly confirmed using a digital test ・ Set the tester to a voltage range of 50V and measure the voltage(multi-meter)
between the switch output (white) and 0V (blue).
24 Vpower supply

・ For NPN output type, when the tip of the switch is pressed, theindicator of the tester changes from 24V down close to 0V.
・ For PNP output type, when the tip of the switch is pressed, theindicator of the tester changes from 0V up close to 24V.

Current■Precautions for Switch Connection
Always make sure to turn off the power before installing orremoving switches.
This is to prevent damage to the device caused by improper wiringor short-circuits of output lines.
Application of an excessive voltage or application of an alternating
current power supply (AC 24 V or higher) to sensors using a direct
current power supply has the risk of damaging the switch.
BrownBrown
SwitchNGBlue

LoadSwitch

Black

Either ground the switch with a switching power supply in close
proximity to the switch or ground through a capacitor (approx.
0.1~0.47 μF) for the purpose of lowering the impedance of the framein order to increase the resistance to entrance of induction noise by
servo drivers or similar devices.
+V0V(0.1〜0.47μF)

Voltage of +24 Vor higher (×)

Alternatively, attach a ferrite core to the switch cable.

LoadBlueFG

SwitchGND

SwitchLevel conversion,etc.
Ferrite core

■Wiring Precautions
・Do not pull or twist the cable with excessive force.
(Max.30N (3kgf)). The bending radius of the cableshould be R7 or larger.(except for heat resistancecable)

・If you want to extend the cord on site, please makethe distance as short as possible as it will otherwise be susceptible tothe increase in the residual voltage and waveform distortion andinduction due to the influence of the line resistance and line-to-linecapacity. In addition, please use the cab tire cord with thecross-sectional area of 0.2 mm² or more.
・As the wiring of the high-voltage line or power line with the switch willcause malfunction by induction if it is done in the same pipe or duct,
please make sure that different routes are used.

・Cabtyre cables are used as robot cables without any safetycompromise since the working voltage and current are low, thoughcabtyre cables are not applicable to UL, CSA, EN or other safety
standards.
・If waterproofing is required, please mold the terminal so that there will
be no exposed portion.
・Use wire braid or protective tube when using under harsh environment
such as where there are scattering of cutting chips.

GM-10-2EH-K001

Terms of Warranty
Before using, we would like to request that our customers have an understanding of warranty policy,
functions and specifications of applicable products as indicated in our catalogs, instruction manuals andweb site to ensure that they are used properly under specified conditions.
1) Applicable Products

The warranty defined below is applicable to products manufactured and sold by METROL (to be referred to as the"applicable products").
2) Warranty Period
The warranty for applicable products is valid for one year4) Applications
and three months from the original delivery date to theApplicable products are designed and manufactured as
location designated by the customer.
general-purpose products used in ordinary industrial*Durability, life time and repeatability are described basedenvironments.
on our test conditions. Please note that the performance isIn the case of incorporating an applicable product in an
not guaranteed under your usage environment.
apparatus, machine or system, please confirm the suitability of3) Range of Coverage
the application along with any related standards, regulations
and restrictions.
a. A replacement product will be provided on an exchange
basis or the malfunctioned product will be repaired free ofWith respect to the applications indicated below in particular,
charge within the warranty period. If the product is or
customers are requested to conduct necessary tests on an
becomes defective and that at the sole discretion of
actual product in advance regarding usage conditions andMETROL, the defects due to faulty materials or workmanother details.
ship.
a. Applications for which usage conditions or environment areHowever, applicable products will not covered by theoutside those presumed by the manufacturer or applications
warranty in the case of the following malfunctions evenunable to be confirmed as being appropriate by thewithin the warranty period.
manufacturer when using applicable products.
( I ) Malfunctions occurred due to use of a product in ab. Applications likely to have an effect on human life or property
manner that deviates from standards, specifications,(such as nuclear power equipment, transportation machinery
environments, usage procedures or usage precautions
or medical devices), applications used in public utilities (suchdescribed in the catalog, instruction manual oras electricity, gas or water lines), or applications applying
specifications.
correspondingly thereto.
( II ) Malfunctions having occurred for reasons other thanc. Applications in harsh environments (special environments
those attributable to the delivered product.
requiring heat resistance, vacuum and the like)( III ) Malfunctions having occurred due to disassembly,
modifications or repairs made by someone else other5) Attention
than the Metrol representative.
・The contents of this catalog, including specific models and,specifications, and any other contents, are subject to change
without notice at METROL’s sole discretion.
・Durability, life time and repeatability are described based on
our test conditions. Please note that the performance is notguaranteed under your usage environment.
・Second characteristic number of the protective structure (IP)represents the waterproofness against water. Thiswaterproofness may not apply to the coolant.

(IV) Malfunctions or damage that results from externalcauses outside our control which shall include
accident fire disaster, other natural disaster or otherforce majeure.
b. The range of coverage is limited to warranty of theapplicable product only, and any other secondary loss ordamage resulting from the malfunction of an applicableproduct is not covered by the warranty.
c. Please be aware that we don't offer installation,
de-installation on-site confirmation and repairs.

Help desk
We accept inquiry regarding sensor selection, exclusive
specification, and technical matter through website, Fax,
and Tel listed below.

www.metrol.co.jp/en
touchsensor@metrol.co.jp
E-mail+81-42-528-1442+81-50-5558-7366

The specifications and descriptions are subjected to change without notice due to improvements in products.
TOKYO JAPANMETROL CO., LTD.
1-100 Takamatsu-cho Tachikawa, Tokyo 190-0011 JAPAN
Tel: +81 50 5558 7366 / Fax: +81 42 528 1442
Website: www.metrol.co.jp/en4