CKD PARECT MEVT Series User manual

ＳＭ−２９５３２１−Ａ
ＩＮＳＴＲＵＣＴＩＯＮ ＭＡＮＵＡＬ
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ＣＯＭＭＯＮ ＴＥＲＭＩＮＡＬ ＳＴＡＮＤ
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Ｄ-ＳＵＢ ＣＯＮＮＥＣＴＯＲ ＴＹＰＥ
ＭＥＶＴ
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Ｔ３０Ｒ
●
Please read this instruction manual
carefully before using this product, par-
ticularly the section describing safety
．
●
Retain this instruction manual with the
product for further consultation whenev-
er necessary
．
Ver.4

[SM-295321-A]
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Ｆｏｒ Ｓａｆｅｔｙ Ｕｓｅ
To use this product safety, basic knowledge of pneumatic
equipment, including materials, piping, electrical system
and mechanism, is required (ISO 4414 *1 JIS B 8370 *2).
We do not bear any responsibility for accidents caused by
any person without such knowledge or arising from im-
proper operation.
Our customers use this product for a very wide range of
applications, and we cannot keep track of all of them. De-
pending on operating conditions, the product may fail to
operate to maximum performance, or cause an accident.
Thus, before placing an order, examine whether the product
meets your application, requirements, and how to use it.
This product incorporates many functions and mecha-
nisms to ensure safety. However, improper operation could
result in an accident. To prevent such accidents
read this
operationmanualcarefullyforproperoperation.
Observe the cautions on handling described in this manu-
al, as well as the following instructions:
Additionally, the caution is classified into the following
three groups, “CAUTION”, “WARNING”, and “DANGER”,
to identify the degree of the danger it presents and possible
hazard.
Failure to pay attention to DANGER no-
ticesmaycauseasituationthatresultsin
afatalityorseriousinjuryandthatrequires
urgentaddressing.
Failure to pay attention to WARNING no-
ticesmayresultinafatalityorseriousin-
jury.
Failure to pay attention to WARNING no-
tices may result in injury or damage to
equipmentorfacilities.
*1) ISO 4414 : Pneumatic fluid power
･･･
Recommendations for
the application of equipment to transmission and
control systems.
*2) JIS B 8370 : General rule for pneumatic systems
DANGER :
!
 WARNING:
!
 CAUTION:
!

[SM-295321-A]
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 CAUTION
Points to caution when handling the product
(1) Inferior quality air will deteriorate the product characteristics and affect its
durability badly. Use an air dryer, filter and Oil mist filter to eliminate solid
material, moisture and tar and thus provide clean air from the pressure
source.
When the control pressure decreases, for example, the air runs from the sec-
ondary side through the regulator to the exhaust port (R). Dust inside the
secondary side piping or the load circuit, therefore, will similarly deteriorate
the product’s characteristics and greatly affect its durability. Ensure the in-
terior of the piping is always clean.
(2) The products response capability will be affected by the working pressure
and load volume. When a stable response is required, regulate the
working pressure.
(3) Flush air into the pneumatic pipes employed in the PARECT
electro-pneumatic regulator before connection. Be careful not to allow
sealant tape to stray into the pipes.
(4) To avoid malfunction caused by electrical noise:
(a) Insert a line filter into the AC power line.
(b) Use a surge suppresser like a CR or diode in the inductive load (solenoid valve, relay and
so on) to remove any noise at the source.
(c) Keep the MEVT series cables as far away as possible from power line for motor.
(d) For wiring to the PARECT electro-pneumatic regulator, always use the shield wire. (T30R)
(e) In the case of the influence of noise, each slave station can possibly be supplied the power
and wire individually.
(
ｆ
) Wire the power line as short as possible.
(
ｇ
) Don’t share the power with devices that generate the noise, such as inverter motor.
(h) Don’t wire the power line or communication line in parallel with other lines.
（５）
Connect the shield wire to the grounding terminal on the power supply
side.
（６）
If the monitor output is not used, take appropriate measures so that the
monitor output terminals and lines are not in contact with other terminals
and lines. Failure to do so may cause the product to malfunction. If this
product is operated with any monitor output terminal or line short-circuited
with the grounding line, this may cause the circuit to break, resulting in
malfunction.
(
７
) Avoid unplanned dismantling of the product. We shall not warrant the
product operation in cases where it has been dismantled without
authorization.
Air filter
5
μ
m
Air dryer Oil mist filter
(Oil removing)
Pressure switch
Regulator

[SM-295321-A]
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(
８
) Avoid operating the product in places where it may be affected by direct
sunlight, water or oil.
(
９
) If the product remains connected to its supply pressure for a long time
while leaving the power turned off, the output pressure may increase to the
level of the supply pressure. For safety, when there is a problem, use the
valve on either the inlet or outlet side. It is recommended to set up the
system for safe operation.
(
１０
) If the power is turned off when the unit is up to control pressure, the pres-
sure will be maintained. In this case, if you need to be in an exhaust state,
lower the control pressure first and then turn off the power or use the ex-
haust valve. However, the maintained pressure is not guaranteed to last for
very long.
(
１１
) Since the working pressure is supposed to provide the exact control pres-
sure, it is important for the working pressure not to drop below “Control
pressure + Maximum control pressure
×
0.1”.
In particular, if the primary pressure is supplied for a long period of time
with the secondary pressure specified in a range that exceeds 0MPa up to
12% F.S., this will shorten the life span of the product and thus the product
should not be used in this way.
(1
２
) The MEVT Series regulators may oscillate if a leak occurs to the secondary
side piping. When connecting pipes to the regulator, connect them firmly
to prevent leaks. Do not use the regulator for blowing or in any other ap-
plication where the secondary side can be affected by back pressure. If
used in such applications, the regulator will not be able to achieve the spec-
ified pressure. Moreover, a large oscillation noise will be heard and the
product’s durability will be greatly reduced.
(1
３
) In the wiring of the MEVT common terminal stand type and D-Sub con-
nector type, the power grounding line and the signal common line are used
commonly. Therefore, when the MEVT-series product is driven by one
PLC and D/A unit, the correct signals may not be output due to wiring de-
pending on the circuit method of the D/A unit. Before starting the opera-
tion, always contact the PLC manufacturer.
(1
４
) Don’t supply the input signal over maximum control pressure, because an
excessive input signal exerts a bad influence on the deterioration of the
characteristic and also the durability.
(1
５
) Keep the exhaust port (R) open to the air to allow the release of the exhaust
into the air.
(1
６
) When it is maintained the condition where the power is on and the working
pressure isn’t supplied or the condition where the power is on and the input
signal is missing from the control range, the deterioration of the character-
istic and also life occur. Therefore, the product should not be used in this
way.

Jun.19.2003
Aug.22.2017
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INDEX
MEVT Series
PARECT Electro-pneumatic Regulator
COMMONTERMINAL STAND TYPE (MEVT-T11R)
D-SUB CONNECTOR TYPE (MEVT-T30R)
Manual No. SM-
２９５３２１
-A
1. DESIGN AND SELECTION  5
2. INSTALLATION 8
3. OPERATION12
4. MAINTENANCE 14
5. PRODUCTS
5.
１
Specifications 15
5.
２
Dimensions 16
5.3 Inside structure 17
5.4 Component18
5.5 Block constitution 19
6. WIRING 20
6.1 Common Terminal Stand Type (T11R)22
6.2 D-sub Connector Type (T30R) 23
7. HOW TO EXTEND EVT 27
8. PRODUCT CODE
8.1 How to order30
8.2 Component code31

[SM-295321-A]
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DESIGNAND
SELECTION
1. DESIGNANDSELECTION
(1) With a thorough understanding of compressed air
characteristics,designapneumaticcircuit.
Where instantaneous stop holding at emergency stop is
required,thesamefunctionasinthemechanicalorhy-
draulicorelectricalunitscannotbeexpected.
There arise pop-up, jet-out and leaking phenomena
causedbycompressibilityandexpansibility,whichareair
characteristics.
(2) Prior to use, always ensure that the product with-
standstheoperatingenvironment.
The product cannot be used in corrosive gas, chemical
liquidsolvent,water,watervapor(steam)andozoneat-
mosphere.  When a product is exposed to water drop-
lets, oil or metallic powder, such as spatters and chips,
besuretoprotectit.
Noproductcanbeusedintheexplosivegasatmosphere.
(3) Alwaysgivespecialcaretotheelectriccircuitduring
emergency stop, and cylinder operation, etc. during
powerfailure.
(4) Attach a
 residual pressure discharge valve   to
thecompressedairinletoftheequipment.
Thepressureswitchcontrolsoperationsothatitcannot
becarriedoutwherethesetpressureisnotreached.
The residual pressure discharge valve discharges com-
pressed air remaining inside the pneumatic circuit, to
preventaccidentscausedbypneumaticequipmentoper-
ationduetoresidualpressure.
!
WARNING:

[SM-295321-A]
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１
DESIGNAND
SELECTION
(1) Note the maintenance conditions clearly in the
equipmentinstructionmanual.
Theproductfunctionsmaysignificantlylower,depending
on the operating condition, operating environment and
maintenance situation, thereby safety might not be se-
cured.  Ifthismaintenanceworkisconductedaccurately
andcorrectly,itispossibletoexhibittheproductfunc-
tionandperformancesufficiently.
(2) Usebeaconstantvoltagepowersupply.
(3) Check the leak current to avoid a malfunction
caused by such leakage from other control equip-
ment.
The EVT may malfunction under the influence of leak
current when a programmable controller or the like is
used.
(4) Toavoidmalfunctioncausedbyelectricalnoise:
InsertalinefilterintotheACpowerline.
UseasurgesuppresserlikeaCRordiodeintheinduc-
tiveload(solenoidvalve,relayandsoon)toremoveany
noiseatthesource.
Keep the MEVT series cables as far away as possible
frompowerlineformotor.
Inthecaseoftheinfluenceofnoise,eachslavestation
canpossiblybesuppliedthepowerandwireindividually.
Wirethepowerlineasshortaspossible.
Don  tsharethepowerwithdevices thatgeneratethe
noise,suchasinvertermotor.
Don  twirethepowerlineorcommunicationlineinpar-
allelwithotherlines.
(5)Cautionsforwiring
In the wiring of the common terminal stand type and
D-Subconnectortype,thepowergroundinglineandthe
signal common line are used commonly.  Therefore,
when multiple EVT-series products are driven by one
PLCandD/Aunit,thecorrectsignalsmaynotbeoutput
duetowiringdependingonthecircuitmethodoftheD/A
unit.  Before startingthe operation, always contact the
PLC manufacturer. Additionally, when using the shield
wire,connecttheshieldwiretothegroundingterminalon
thepowersupplyside.
(6) Do not use combined with a cylinder having a sub-
stantialleakageamountsuch as,acrawlingcylinder
oranairbearingcylinder.
Incaseof24VDC: 1.8mAorless
!
CAUTION:

[SM-295321-A]
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１
DESIGNAND
SELECTION
Avoidusingaproduct inblowingorundertheoperating
conditionsthatthebackpressureisappliedtothesec-
ondaryside.  Nosetpressurecanbemaintained,andits
service life may be shortened along with a large beat
sound.
(7) EVT100 arises residual pressure of 2kPa max and
EVT500, 10kPa max even when the input signal is
set to 0%.  When 0MPa is required, take adequate
measures;forexample,attacha3-wayvalvetothe
secondarysideforchangeovertotheatmosphere.
(8)
Useavalveoninletandoutletasneeded
If the product is left as it is with the supply pressure
whennopoweristurnedON,thesecondarysidepressure
mayincreaseuptothesupplypressure.
Ifsometroubleisconcernedonsafety,takepropersafe-
ty measures in the system; for example, use a valve on
inletoroutlet.
(9) OperatingEnvironment
Avoid using a product in the place where it is ex-
poseddirecttosunlight,water,oilorthelike.  Con-
tact us when using a product that falls outside the
designatedspecificationsandspecificationsforspe-
cialapplications.
AmbientTemperature
Contactuswhentheproductisusedatexceeding50℃
oralowtemperaturenotexceeding5℃.
Vibration&impact
Avoid using the product at the vibration of 50 m/s
2
min.
andimpactof300m/s
2
min.
!
CAUTION:

[SM-295321-A]
−
8
−
２
INSTALL
A
TION
2. INSTALLATION
(1) For MEVT installation, do not use the method of
supportingtheMEVTwithpiping.
AttachandfixtheMEVTmainbody.
(2) Do not wash and coat the MEVT, using water and
solvent
.
Someplasticspartsmaybedamaged.
The coating agent may block the exhaust port, causing
malfunctions.
(3) Check the piping port position by the product label
ornameplate,etc.forcorrectconnections.
Wrong piping connection causes abnormal operation of
theactuator.
!
WARNING:

[SM-295321-A]
―
9
―
２
INSTALL
A
TION
Wheninstalling:
(1) Keepasufficientspaceforremoval&re-installation,
wiringandpipingworkaroundtheEVT.
(2) Provide a pneumatic filter just in the pre-stage of
thecircuitinwhichthepneumaticequipmentisused.
(3) Theresponsetimeisaf-
fected by operating
pressure and load ca-
pacity.
When stable reproduci-
bility is required for this
responsibility, set up a
regulator in the
pre-stage.
(4) Attachingposition
SincetheMEVTisdesignedforDINrailmounting,fixthe
DIN rail to the attaching surface at intervals of 50 to
100mmwherethetotalmanifoldmassexceeds1kgorin
the environment under vibration and impact, and then
ensurethatnoabnormalityisidentifiedintheinstallation
conditionbeforeuse.
Thereisnorestrictionintheattachingdirectionandat-
tachingposture.Checkthemountingscrewdoesn
 tget
loosebyresonanceduringoperation,toavoidthemani-
foldtofalloff.
Removal&re-installationofMEVT
 ToRemoveMEVT:
LoosentheDINrailfixingscrews.(4pcs.in2right&left
places)
 ToRe-installMEVT:
1. Set the jaw over the DIN rail from ① to ② as
shownbelow.
2. Presstheretainerinthedirectionto ③ below.
3. While pressing it so that no clearance is produced
between the blocks, tighten the DIN rail fixing
screws.  (Recommendabletighteningtorque:  0.6to
0.8N･m.)
When the retainer
jaw is not hooked
firmly, air leakage
and product fall-
ing-off may result:
always check this
mounting condition
carefully.
Airfilter
（5μmorless）
EVT
①
②
③
Push
Retainer
DINrailfixingscrew
!
CAUTION: