SMC Networks ZL3 Series User manual

Doc.No.ZL3-OM00601
Product name
Multistage ejector
Model/ Series/ Product Number
ZL3 Series
ZL6 Series

Doc. No.ZL3-OM00601
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Contents
Safety Instructions 2
1. How to Order 5
2. Summary of Product Parts 6
3. Mounting and Installation 7
3.1. Installation 7
3.2. Operating Enviroment 8
3.3. Air Supply 9
3.4. Piping 10
3.5. Wiring 12
4. Solenoid Valve 13
5. Vacuum Pressure Switch 14
6. Vaccum release flow adjusting needle 15
7. Structural Drawing and Replacement of Parts 16
8. Maintenaunce 20
9. Specifications 21
10. Pneumatic Circuit 24
11. Exhaust Characteristics,Flow Characteristics,
And Time required to reach the specified vacuum 25
11.1. Exhaust Characteristics 25
11.2. Flow Characteristics 26
11.3. Time required to reach the specified vacuum 26
12. Handling Precautions 27
13. Trouble shooting 28

Doc. No.ZL3-OM00601
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Multistage Ejector/ZL3,ZL6 Series
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment damage.
These instructions indicate the level of potential hazard with the labels of "Caution", "Warning" or "Danger".
They are all important notes for safety and must be followed in addition to International Standards
(ISO/IEC)*1) and other safety regulations.
*1) ISO 4414: Pneumatic fluid power -- General rules relating to systems
ISO 4413: Hydraulic fluid power -- General rules relating to systems
IEC 60204-1: Safety of machinery -- Electrical equipment of machines.(Part 1: General requirements)
ISO 10218: Manipulating industrial robots-Safety.
etc.
Caution
CAUTION indicates a hazard with a low level of risk which, if not avoided, could result in minor
or moderate injury.
Warning
WARNING indicates a hazard with a medium level of risk which, if not avoided, could result in
death or serious injury.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, could result in death or
serious injury.
Warning
1. The compatibility of the product is the responsibility of the person who designs the equipment or
decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
equipment must be decided by the person who designs the equipment or decides its specifications based
on necessary analysis and test results.
The expected performance and safety assurance of the equipment will be the responsibility of the person
who has determined its compatibility with the product.
This person should also continuously review all specifications of the product referring to its latest catalog
information, with a view to giving due consideration to any possibility of equipment failure when
configuring the equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or equipment including our products must be
performed by an operator who is appropriately trained and experienced.
3) Do not service or attempt to remove product and machinery/equipment until safety is confirmed.
1.The inspection and maintenance of machinery/equipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
2. When the product is to be removed, confirm that the safety measures as mentioned above are
implemented and the power from any appropriate source is cut, and read and understand the specific
product precautions of all relevant products carefully.
3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and
malfunction.
4. Contact SMC beforehand and take special consideration of safety measures if the product is to
be used in any of the following conditions.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place
exposed to direct sunlight.
2. Installation on equipment in conjunction with atomic energy, railways, air navigation, space, shipping,
vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment
or other applications unsuitable for the standard specifications described in the product catalog.
3. An application which could have negative effects on people, property, or animals requiring special
safety analysis.
4. Use in an interlock circuit, which requires the provision of double interlock for possible failure by using
a mechanical protective function, and periodical checks to confirm proper operation. Inspect the
product periodically to confirm proper operation.

Doc. No.ZL3-OM00601
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Multistage Ejector/ZL3,ZL6 Series
Safety Instructions
Caution
The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange specifications
or a contract if necessary.
If anything is unclear, contact your nearest sales branch.
Limited Warranty and Disclaimer/ Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance
Requirements”.
Read and accept them before using the product.
Limited Warranty and Disclaimer
1. The warranty period of the product is 1 year in service or 1.5 years after the product is delivered,
whichever is first.*3) *
Also, the product may have specified durability, running distance or replacement parts. Please
consult your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our responsibility,
a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage
incurred due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and disclaimers
noted in the specified catalog for the particular products.
*3) Vacuum pads are excluded from this 1 year warranty.
A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum pad or
failure due to the deterioration of rubber material are not covered by the limited warranty.
Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of weapons of mass
destruction(WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are governed by the relevant
security laws and regulation of the countries involved in the transaction. Prior to the shipment of a SMC
product to another country, assure that all local rules governing that export are known and followed.
Caution
SMC products are not intended for use as instruments for legal metrology.
Measurement instruments that SMC manufactures of sells have not been qualified by type approval tests
relevant to the metrology (measurement) laws of each country.
Therefore, SMC products cannot be used for business or certification ordained by the metrology
(measurement) laws of each country.

Doc. No.ZL3-OM00601
4
Safety Instructions
Warning
Disassembly
prohibited
■Do not disassemble, modify (including the replacement of board) or repair other than
instructed in this manual.
Otherwise, an injury or failure can result.
Do not
Do not operate the product outside of the specifications.
Do not use the product with flammable or harmful fluids.
Fire, malfunction, or damage to the product may result.
Check the specifications before use.
Do not
Do not use in an atmosphere containing flammable or explosive gases.
Fire or an explosion may result.
This product is not explosion-protected.
Do not
■Do not use the product in a place where static electricity is a problem.
Otherwise failure or malfunction of the system can result.
Do not
■Do not cut off the power and compressed air supplied to this product while it is
operating.
Otherwise it can cause injury due to dropping of workpieces or damage to the
system.
Instruction
■If using the product in an interlocking circuit
- Provide a double interlocking system, for example a mechanical system.
- Check the product regularly for proper operation.
Otherwise malfunction can result, causing an accident.
Instruction
■The following instructions must be followed during maintenance
- Turn off the power supply
- Stop the air supply, exhaust the residual pressure in piping and verify that the air is
released before performing maintenance work.
Otherwise an injury can result.
Do not touch
■Do not touch the terminals and connectors while the power is on.
Otherwise electric shock, malfunction and damage to the product can result.
Instruction
■Perform sufficient trial run.
Otherwise, injury or damage to the system can result due to suction failure depending on the
conditions of the suction of the workpiece or the pressure switch settings.
Perform sufficient verification before using this product.
Instruction
■After maintenance is complete, perform appropriate functional inspections and leak
test.
Stop operation if the equipment does not function properly or there is leakage of fluid.
If there is leakage from parts other than the piping, the product might be broken.
Cut off the power supply and stop the fluid supply.
Do not supply fluid if there is leakage.
Safety cannot be assured in the case of an unexpected malfunction.

Doc. No.ZL3-OM00601
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1.How to Order
ZL3 M 06 1–K1 5 LO Z 1 –E A M G - 1
ZL3 M 06 1–K1 5 LO Z 1–E A M G - 1
ZL3 M 06 1–K1 5 LO Z 1–V A M W - 1
5) Combination of the supply valve and the release valve
K1
Supply valve (N.C.) + Release valve (N.C.)
K2
Supply valve (N.C.)
B1
Supply valve (N.O.) + Release valve (N.C.)
B2
Supply valve (N.O.)
7) Electrical entry
L
L shaped plug connector
Lead wire length 0.3(m)
LO
Without connectors
M
M plug connector
Lead wire length 0.3(m)
MO
Without connectors
8) Light/surge voltage suppressor
Z
Light/surge voltage suppressor
9) Manual override
Nil
Non-locking push type
D
Push-turn locking slotted type
E
Push-turn locking (manual type)
10) Vacuum pressure sensing part
Nil
―
GN
Vacuum pressure sensing port (G)
G
Pressure gauge
E
Vacuum pressure switch (Vacuum 2 outputs)
F
Vacuum pressure switch (Compound 2 outputs)
V
Pressure switch with energy saving function
(Compound 1 output)
11) Output specification
A
NPN open collector
B
PNP open collector
13) Electrical entry
Nil
Without lead with connector
G
Lead wire with connector (Length 2m)
W
Lead wire for energy saving switch (2m)
Without valve
With valve
Pressure switch
with energy
saving function
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
*2: Port thread type is the same as the thread type
selected for 3).
4) Exhaust specifications
Nil
Exhaust through silencer
P
Port exhaust *2
*1: The thread shape complies with the G thread standard
(JIS B 0202). Other shapes do not comply with ISO1603 or
ISO1179.
1) Max. suction flow
3
300L/min(ANR)
6
600L/min(ANR)
2) Standard supply pressure
M
0.35MPa
H
0.50MPa
3) Supply (P), vacuum (V) port / one-touch fitting port size
Vacuum (V) port
Supply (P) port
06
Rc3/4
8(㎜)
04
2xRc1/2
F06
G3/4*1
F04
2xG1/2*1
N06
NPT3/4
5/16(inch)
N04
2xNPT1/2
6) Rated voltage
5
DC24V
12) Units specification
Nil
With unit conversion function
M
Fixed to SI unit (kPa)
P
With unit conversion function
[Initial value PSI]
14) Option
Nil
Without options
B
Adapter assembly for bottom
porting
*7：Adapter assembly for adapting to the bottom porting
thread pitch (27mm) of the existing ZL212 series.
Necessary when replacing the existing ZL212 which is
mounted to the bottom. (2Pcs/set, with 4 bolts)
Mounting holes on the side is compatible without
optional parts.

Doc. No.ZL3-OM00601
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2. Names of Parts of Product
2.1 Names of Parts of Product
2.2 ZL6 Series Silencer assembly Replacement
1) The silencer assembly of the ZL6 series is not assembled when the
product is shipped. It is necessary to assemble the silencer
assembly before use.
2) Insert the silencer assembly hook to the groove of the product
and insert it in arrowed direction until it clicks.
Without valve
Silencer case
(Exhaust)
Vacuum (2/V) port
Air pressure supply (1/P)
port
Port exhaust
Port block
With vacuum pressure switch
Exhaust (3/E) port
Vacuum pressure switch
With pressure gauge
Pressure gauge
Vacuum pressure sensing port
Vacuum pressure
sensing (G) port
Branch type
Vacuum (2/V) port
With supply valve/release valve, pressures switch
Vacuum pressure switch
Supply valve and release
valve
Vacuum release flow
adjusting needle.
Silencer assembly
ZL3 Series
ZL6 Series
Silencer assembly
(ZL6-SC1-A)
Press until it clicks.

Doc. No.ZL3-OM00601
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3. Mounting and Installation
3.1 Installation
3.11. Direct mounting
1) Fix the product by mounting it on the top, side or bottom surface.
2) Keep to the recommended tightening torque.
Recommended tightening torque
Top and side mounting: 0.56 to 0.76[Nm], bottom mounting: 0.29 to 0.31[Nm]
3.1.2 Mounting compatibility with the existing ZL212 series
1) Although this product is compatible with the ZL212, multistage ejector (existing product), bottom
mounting adapter assembly (ZL3-AD3-A) is required for the bottom mounting.
Top mounting is not available for the ZL212 series, existing multistage ejector.
2) When mounting the bottom mounting adapter assembly, mount the adapter to the surface as
shown below.
Recommended tightening torque
Bottom mounting: 1.3 to 1.5[Nm]
Top mounting
Mounting hole (2 x 4.1)
Side mounting
Mounting hole (3 x 4.4)
Bottom mounting
Female screw
(4 x M3 x 0.5, depth: 5)
Adapter assembly for bottom
porting
（ZL3-AD3-A）
Bottom mounting
Female screw (4 x M5 x 0.8, depth: 6)

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3.1.3 Precautions
1) When installing the product, allow sufficient space for maintenance and inspection.
2) Tightening torque exceeding the recommended value may damage the product and
mounting screws. Insufficient torque can cause displacement of the body from its proper
position and the looseness of the mounting screws.
3) Do not drop, hit or apply excessive shock to the product. The internal parts, solenoid valve and
pressure switch may get damaged and malfunction.
3.2 Operating environment
1) Do not use in an atmosphere where corrosive gases, chemicals, sea water, water or water
steam is present. These may cause failure or malfunction.
2) Do not use the product in an environment where the product may be splashed by oil or
chemicals. If the product is to be used in an environment containing oils or chemicals such as
coolant or cleaning solvent, even for a short time, the pressure switch may be adversely
affected (damage, malfunction, or hardening of the lead wires).
3) The suction filter is not included in the product. Malfunction may occur by contamination into the
product such as dust contained in the surrounding environment. It is recommended to use SMC's
vacuum filter (AFJ series) in order to avoid problems.
4) Do not use in a location where surges are generated. When there are machines or equipment
that generate large surge near the pressure switch (magnetic type lifter, high frequency
inductive furnace, motor, etc.), this can result in deterioration and damage of the internal
elements. Take measures against the surge sources, and prevent the lines from coming into
close contact.
5) Do not use a load which generates surge voltage. When a surge-generating load such as a
relay or solenoid is directly driven, use the product with built in surge protection.
6) The product is CE marked, but not immune to lightning strikes, so take measures against
lightning strikes. Be aware of excessive surrounding noise. The product is CE marked, but
settings may change if excessive noise is applied.
7) Do not install this product in a location subject to vibration and impact. Otherwise it can cause
damage or malfunction.
8) Do not let foreign matter, such as wire debris, get inside the product. In order to avoid failure
and malfunction, do not let foreign matter, such as wire debris, get inside the product.
9) Do not use the product in an environment that is exposed to cyclic temperature patterns. Heat
cycles other than ordinary changes in temperature can adversely affect the internal
components of the product.
10) Do not expose the product to direct sunlight. If using in a location directly exposed to sunlight,
protect the product from the sunlight. Otherwise it can cause damage or malfunction.
11) Keep within the operating fluid temperature and ambient temperature range. Operation under
low temperature may lead to damage or operation failure due to frozen moisture in the fluid or
air. Protection against freezing is necessary. Mounting of an air dryer is recommended for
elimination of drainage and water. Avoid abrupt temperature changes even within the
specified temperature range.
12) Do not use in a location where the product is exposed to radiant heat from surrounding heat
sources. Otherwise malfunction can result.

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3.3. Air supply
3.3.1 Air quality
1) Using compressed air which contains chemicals, synthetic oils containing organic solvents,
salts or corrosive gases, etc. can cause damage or malfunction. Do not use with fluid or in
an environment which contains harmful impurities.
2) If the compressed air contains excessive drainage or carbon powder, it can stick to the
vacuum generating part (the nozzle diffuser) or inside of the solenoid valve or the pressure
switch for vacuum and cause deterioration of the performance or operation failure.
3) It is recommended to use supply air which purity class is 2:6:3 of ISO08573-1:2010（JIS
B8392-1:2012）. Supply air containing foreign matter, water, oil or condensate, etc. can
cause malfunction of supply valve or release valve. Install an air filter or mist separator to the
upper stream to prevent condensate from entering to the product and perform maintenance
periodically to control the supply air properly.
※Air quality class based on ISO8573-1:2010 (JIS B8392-1:2012)
● Solid particles
● Moisture
Adhesion of oil
Class
Maximum particle count per m3for particle diameter d(µm)
Class
Pressure
dew
point(℃)
Class
Oil
concentration
(mg/m3)
0.1 ˂ d ˂ 0.5
0.5 ˂ d ˂ 1.0
1.0 ˂ d ˂ 5.0
1
˂20,000
˂400
˂10
1
˂-70
1
˂0.01
2
˂400,000
˂6,000
˂100
2
˂-40
2
˂0.1
3
Not specified
˂90,000
˂1,000
3
˂-20
3
˂1
4
Not specified
Not specified
˂10,000
4
˂+3
4
˂5
5
Not specified
Not specified
˂100,000
5
˂+7
6
˂+10
3.3.2 Air pressure
1) Operation with a pressure exceeding the maximum operating pressure leads to breakage of
the product.
2 : 6 : 3
Air preparation
equipment
Screw
Air compressor
Main Line Filter
AFF Series
Refrigerated Air
Dryer
Air filter
AF Series
Regulator
AR Series
Mist separator
AFM Series
Vacuum ejector

Doc. No.ZL3-OM00601
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3.4. Piping
3.4.1 Port size
Port size. Refer to How to Order for details (page 5).
3.4.2 Piping to ports
1) When piping to a vacuum port or pressure detection port, the body made of aluminium
alloy should be fixed. Refer to the table below for the tightening torque.
2) When piping to the exhaust port, fix the port block. Refer to the table below for the
tightening torque.
3) When installing piping or a tube fitting into a port, prevent cutting chips
and sealant material from getting inside the product. If a sealant tape
is used, leave 1 thread exposed at the end of threads.
Symbol
Vacuum (2/V) port
Exhaust (3/E) port
Pressure sensing port (G)
Supply (1/P) port
06
Rc3/4
Rc1
Rc1/8
One-touch fitting
Applicable tube diameter
8(㎜)
04
Rc 1/2
F06
G3/4
G1
G1/8
F04
G1/2
N06
NPT3/4
NPT1
NPT1/8
One-touch fitting
Applicable tube diameter
5/16(inch)
N04
NPT1/2
Port type
Thread size
Recommended tightening
torque (Nm)
Pressure sensing port (G)
Rc1/8,G1/8,NPT1/8
3-5
Vacuum (2/V) port
Rc1/2,G1/2,NPT1/2
28 to 30
Rc3/4,G3/4,NPT3/4
28 to 30
Exhaust (3/E) port
Rc1,G1,NPT1
36～38
Vacuum (2/V) port
Vacuum pressure sensing port (G)
Exhaust (3/E) port
Surface to fix the body
(Width across flats: 40mm)
Surface to fix the port block
(Width across flats: 40mm)
Wrapping
direction
Pipe tape
Leave one thread
A

Doc. No.ZL3-OM00601
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3.4.3 Application and operating pressure range of each port
3.4.4 Air supply port (1/P) (one-touch fitting)
# Tube attachment
1) Take a tube having no flaws on its periphery and cut it off at right angles. When cutting the
tube, use tube cutters. If cutting is done with tools other than tube cutters, the tube may be
cut diagonally or become flattened, etc., making a secure installation impossible, and
causing problems such as the tube pulling out after installation or air leakage. Also, allow a
sufficient margin of tube length.
2) Hold the tube and push it in slowly, inserting it completely into the fitting.
3) After inserting the tubing, pull on it gently to confirm it is secure. Incorrect insertion may
cause air leakage or release of the tubing.
4) Prevent the connected tube from being rotated. The fitting may be damaged.
# Removal of the tube
1) Press the release button evenly and firmly.
2) Hold down the release button while pulling out the tube. If the release button is not held
down sufficiently, the tubing cannot be withdrawn.
3) If the removed tubing is to be used again, cut off the section that has been secured in the
fitting. Re-using this portion of the tube can cause problems such as air leakage or difficulty
in removing the tube.
# Other manufacturer’s tube
When using other than SMC brand tube, confirm that the following specifications are satisfied
with respect to the tube outside diameter tolerance.
1) Nylon tube Within +/-0.1mm
2) Soft nylon tube Within +/-0.1mm
3) Soft polyurethane tube Within +0.15mm or -0.2mm
Do not use tubing which does not meet these outside diameter tolerances. Connection to the
fitting may fail, causing disconnection of the tube and air leakage.
3.4.5 Precautions for the air tube
(1) Allow a sufficient margin of tube length when piping, in order to prevent twisting, tensile,
moment loads, vibration or impact being applied to the tubes. This will cause damage to the
fittings and will crush, burst or release tubing.
2) Piping to the product is assumed to be static piping. If the tube moves, it may become worn,
elongated or torn due to tensile forces, or disconnected from the fitting. Ensure the tube is in
a static condition at all times before using.
3) Do not lift the product by holding the piping after the tube is connected. This may lead to
damage of the filter case of One-touch fitting.
4) Before piping is connected, flush the lines thoroughly with air or wash to remove chips,
cutting oil and other debris from inside the pipe. Otherwise it can cause damage or
malfunction.
5) When connecting tubing, consider factors such as changes in the tubing length due to
pressure, and allow a sufficient margin. Failure to do so may result in fitting breakage or
detachment of the tubing.
Refer to Fittings & Tubing Precautions from 1 to 4 shown in Best Pneumatics 6 on SMC’s
website (URL ) for the recommended piping conditions.
Port
symbols
Description
Application
Operating pressure
range
1/P
Air pressure supply
port
Compressed air supply for operating
vacuum ejector
0.2 to 0.6MPa
2/V
Vacuum port
Adsorption equipment including suction
cup
―
3/E
Exhaust port
Exhaust when the vacuum ejector
operates Note 1)
―
G
Pressure sensing
port
Connect the pressure sensing equipment
―

Doc. No.ZL3-OM00601
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3.5 Wiring
3.5.1 Precautions for Wiring
1) Do not pull the lead wire for the solenoid valve or pressure switch forcefully or lift the product by
the lead wire. Otherwise damage to the solenoid valve or internal parts can result, causing
malfunction or causing the connector to come out. Refer to the table below for the lead wire
tensile force.
Table Lead wire tensile force
Lead wire type
Tensile force
Lead wire with connector for solenoid valve
(30N or less)
Lead wire with connector for vacuum pressure switch
(35N or less)
Lead wire with connector for energy saving vacuum switch
(20N or less)
2) Avoid repeatedly bending or stretching the lead wires, or placing a heavy load or applying
force to them. Repetitive bending stress or tensile stress can cause the sheath of the wire to
peel off.
If the lead wire can move, secure it near the body of the product.
The recommended bend radius of the lead wire is 6 times the outside diameter of the sheath,
or 33 times the outside diameter of the insulation material, whichever is larger.
Replace the damaged lead wire with a new one.
3) Wire correctly. Incorrect wiring can cause malfunction or breakage of the solenoid valve or
pressure switch.
4) Do not perform wiring while the power is on. The internal parts of the solenoid valve or
pressure switch may get damaged and malfunction.
5) Do not route wires and cables together with power or high voltage cables. Route the wires of
the product separately from power or high voltage cables in order to avoid noise or surge
entering the signal line from the power or high voltage line.
6) Verify the insulation of wiring. Poor insulation (interference with other circuits, poor insulation
between terminals etc.) can apply excessive voltage or current to the pressure switch,
causing damage.
7) Design the product to prevent reverse current when the circuit is open or the product is
forced to operate for operational checks. Depending on the circuit used, insulation may not
be maintained when operation is forced, allowing reverse current to flow, which can cause
malfunction and damage to the solenoid valve and pressure switch.
8) Keep wiring as short as possible to prevent interference from electromagnetic noise and
surge voltage. Do not use a cable longer than 10m. Wire the DC (-) line as close as possible
to the power supply.

Doc. No.ZL3-OM00601
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4. Solenoid valve
4.1 Manual override
There are 3 types of manual override operation. Push the manual override with a screwdriver
until it reaches the end. Confirm that the product operates safely before the operation of the
manual override.
4.2. Wiring
To install the connector, hold the cover and insert the connector straight pushing the connector
lever with your finger. Ensure that the connector lever clip is properly inserted into the groove of
the cover. To remove the connector, hold the solenoid valve and pull out the connector straight
pushing the connector lever clip.
4.3 Internal circuit
Connect correctly the lead wires to +(positive) and –(negative) indications. When the lead wires
are already connected, red wire is (+) and black wire is (-). With light/surge voltage suppressor The
valve installed onto the product has polarity.
4.4 Initial state
When the valve assembly is delivered, the supply valve is on the OFF position, but it may be
on the ON position due to the vibration or impact during transportation or device installation.
Move supply valve to OFF position manually or energizing before use.
4.5. Precautions
1) The specified voltage must be used. Otherwise failure, malfunction or short life can result.
2) If a valve is energized for an extended period of time without a break, the rise in temperature
due to heat-up of the coil may cause a decline in solenoid valve performance, reduce
service life, or have adverse effects on peripheral equipment. The solenoid valve should not
be energized continuously for longer than 10 minutes, and the energizing time in one day
should be shorter than the non-energizing time.
Connector
Solenoid valve
Lever
Manual override operation type
無期号:
Non-locking
push type
D:
Push-turn
locking slotted
type
E:
Push-turn
locking (manual
type)
Red (+)
Black (-)
Polarity protection diode
Coil
LED
Nil:

Doc. No.ZL3-OM00601
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5. Vacuum pressure switch
5.1 Internal Circuit and Wiring Examples
5.2.1 Vacuum pressure switch
*The FUNC terminal is connected when using the copy function.
*Refer to the Operation Manual for details on setting the ZSE/ISE10.
5.2.2 Pressure switch for vacuum with energy saving function
*FUNC terminal is for energy saving operation of the supply valve.
*Refer to the Operation Manual for details on setting the ZSE10 (for ZL3, ZL6 series).
5.2. Handling / adjustment Precautions
1) The specified voltage must be used. Otherwise failure, malfunction or short life can result.
2) Connect a load before turning the power supply on. If the power supply is turned on with no
load connected to the pressure switch, over current may occur, causing the product to break
instantly.
3) Do not short circuit the load. An error is displayed when the load of the pressure switch is
short circuited, but over current may flow, causing damage to the pressure switch.
4) Do not press the setting buttons with a sharp pointed object. This may damage the setting
buttons.
5) If using the product to detect very small pressures, warm up the product for 10 to 15 minutes
first. There will be a drift on the display of approximately 1% for 10 minutes after the power
supply is turned on.
6) Perform settings suitable for the operating conditions. Incorrect setting can cause operation
failure. For settings, refer to the Operation Manual of the pressure switch.
7) Do not touch the LED during operation. The display can vary due to static electricity.
8) If a commercially available switching power supply is used, be sure to ground the frame
ground (FG) terminal.
NPN (1 output)
PNP (1 output)
NPN (2 output)
Brown DC (+)
Black OUT1
白OUT2
FUNC
Blue DC (-)
Load
Load
DC12
to
24V
Max.80ｍ
Residual voltage: 2V or less
PNP (2 output)
Brown DC (+)
Black OUT1
白OUT2
FUNC
Blue DC (-)
Load
Load
DC12
to
24V
Max.80ｍ
Residual voltage: 2V or less
Pressure switch (NPN)
Supply valve
Release valve
-
-
-
+
+
+
OUT1
OUT2
FUNC*
Brown
Black
Gray *
Blue
White
Connector cord assembly
(ZL3-LW1-N-A)
Load
24VDC
Pressure switch (PNP)
Supply valve
Release valve
+
-
-
-
+
+
OUT1
OUT2
FUNC*
White
Blue
Gray *
Black
Brown
Connector cord assembly
(ZL3-LW1-P-A)
Load
24VDC
Main circuit
Main circuit
Main circuit
Main circuit

Doc. No.ZL3-OM00601
15
6. Vacuum release flow adjusting needle
6.1. Vacuum release flow adjusting method
Vacuum release air is output by turning the release valve ON. The flow rate of vacuum release air
can be adjusted by adjusting the vacuum release flow adjustment needle.
For the adjustment of the vacuum release flow, pull the push-lock handle for unlocking.
Clockwise rotation of the push-lock handle → vacuum release flow decreases.
Counterclockwise rotation → vacuum release flow increases.
6.2. Precautions
1)Leakage cannot be completely eliminated when the needle is fully closed. A certain amount of
leakage is allowed in the products specifications. Tightening the needle to achieve zero
leakage may result in equipment damage.
2) Make sure that the push-lock handle is locked. Lock the handle by pushing it down and
confirm that it is locked. It should not be possible to rotate it.
3)If the push-lock handle is pulled with force for unlocking, it may break. Do not pull the handle
with excessive force.
4) The retaining mechanism works when the vacuum release flow adjustment needle makes 12
revolutions from the completely closed state, and it is not possible to turn any more. The needle
may break if it is rotated more than 12 revolutions.
5) Do not use tools such as pliers to tighten the handle. This can result in breakage due to over
torquing.
Locked
Unlocked
A

Doc. No.ZL3-OM00601
16
7. Structural Drawing and Replacement of Part
7.1. Construction
ZL3
Valve and pressure switch are not included.
Silencer exhaust type.
ZL3
Valve and pressure switch are included.Port exhaust type.
No.
Description
Material
Notes
14
Pressure gauge
-
Refer to Replacement Part 7.
15
Valve plate
PBT
-
16
Handle
POM
-
17
Needle
PBT
-
18
Needle guide
Brass
(Electroless nickel
plating)
-
19
Port block
Aluminum alloy
(Chromated, coating)
Refer to Replacement Part 6.
20
Supply valve and release
valve
-
Refer to Replacement Part 1.
21
Vacuum pressure switch
-
-
22
Adapter assembly for
bottom mounting.
Brass
(Electroless nickel
plating)
Refer to Replacement Part 8.
-
Sealing material (O-ring)
HNBR/NBR
-
-
Mounting screws
Steel
(Trivalent chromated)
-
Components
No.
Description
Material
Notes
1
Body
Aluminum alloy
(Anodized)
-
2
Nozzle
POM
Refer to Replacement
Part 2.
3
Diffuser
PBT
4
Attachment
POM
5
Check valve
FKM
6
Front adapter
PBT
-
7
End adapter
PBT
-
8
Silencer case 1
PBT
9
Sound absorbing material 1
Resin
Refer to Replacement
Part 4.
10
Sound absorbing material 2
Non-woven fabric
11
Silencer case 2
PBT
12
Silencer cap
POM
13
Sound absorbing material 3
Non-woven fabric
Not replaceable by
single unit
Refer to Replacement Part 5.
Refer to Replacement Part 3.
ZL6
Valve and pressure switch are included.Port exhaust type.
ZL6
Valve and pressure switch are not included.
Silencer exhaust type.

Doc. No.ZL3-OM00601
17
7.2 How to Order Replacement Parts
1Solenoid valve (supply valve/ vacuum release valve) assembly (common for ZL3/ZL6)
ZL3-JSY3140-5LaZ a–a
Lead wire assembly with the connector for supply valve/ release valve
SY100-30-4A-6
Supply valve/ Release valve connector socket (common for ZL3 / ZL6)
SY100-30-A
* Connector, socket(2pcs.)
1)
3）
2)
Rated voltage 24 VDC
With light/surge voltage suppressor
Nil
Supply valve
X12
Release valve
3) Supply valve and release valve
Description
Components
Notes
Solenoid
valve
assembly
Solenoid valve
1pc./set
Gasket
1pc./set
Connector with lead
wire
Not included in the type LO
and MO (see 1) Electrical
entry)
Mounting screw
2pcs./set
Solenoid valve assembly component
* Mounting screw recommended tightening torque is 0.15 to 0.18Nm.
1)
2)
1) Power supply
voltage
Rated voltage
4
24 VDC
2) Lead wire length
Nil
300 ㎜
6
600 ㎜
10
1000 ㎜
15
1500 ㎜
20
2000 ㎜
25
2500 ㎜
30
3000 ㎜
50
5000 ㎜
2) Manual override
Nil:
Non-locking
push type
D:
Push-turn
locking type
Driver Operation
E
Push-turn
locking type
Manual override
Lead wire assembly with the connector for
the supply valve / release valve
Gasket
Mounting screws
Release valve
Supply valve
1) Electrical entry
With lead wire
(Length: 300mm)
Without
connectors
Without
connectors
With lead wire
(Length: 300mm)

Doc. No.ZL3-OM00601
18
Assembly with lead wire with connector for vacuum pressure switch (common for ZL3 / ZL6)
Assembly with lead wire with connector for vacuum pressure switch
ZS-39-5G
Lead wire assembly with connector for energy saving switch
ZL3-LW1-N-A
Vacuum pressure switch is not replaceable
Care should be taken.
2Ejector assembly (common for ZL3/ZL6)
ZL3-EJ1-H- -A
3Silencer assembly (for ZL3)
ZL3-SC1-A
4Sound absorbing material assembly (for ZL3)
ZL3-SE1-A
1)
1) Rated voltage
N
NPN open collector
P
PNP open collector
1)
2)
1) Standard supply pressure
M
0.35MPa
H
0.50 MPa
2)1st. ejector Check valve
Nil
―
V
Yes
* Pressure switch with energy saving function requires
1st ejector check valve.
Assembly with lead wire
with connector for vacuum
pressure switch
Ejector assembly
Mounting screw 4pcs. (M4X110)
Recommended tightening torque: 0.76 to 0.84Nm
Sound absorbing material 1
Sound absorbing material 2
Silencer case
Sound absorbing material assembly
Silencer assembly
Lead wire assembly with connector
for energy saving switch

Doc. No.ZL3-OM00601
19
5Silencer assembly (for ZL6)
ZL6-SC1-A
6Port block assembly (common for ZL3/ZL6)
ZL3-EP1-1 -A
7Pressure gauge (common for ZL3/ZL6)
GZ33-K1K-01-X56
(Displayed in kPa)
GZ33-K1K-01-X56
(Displayed in inHg/psi)*
* The inHg/psi type is not for use in Japan due to a new measurement law.
8Adapter assembly for bottom mounting (for ZL3)
ZL3-AD3-A
1) Thread type
1)
Nil
Rc
F
G
N
NPT
Pressure
gauge
Port block assembly
Adapter assembly for bottom porting
Silencer assembly
(including sound absorbing material)
* Sound absorbing material is not sold separately.