6-9-p0027-0080-vx21_en.pdf - 第55页

A A View A-A (Internal connection diagram) + Mark – Mark Round head combination screw M3 Tightening torque 0.5 to 0.6 N·m Round head combination screw M3 Tightening torque 0.5 to 0.6 N·m Terminal cover Conduit terminal G…

Electrical Connections

Caution

 Grommet

Class B coil: AWG20 Insulator O.D. 2.6 mm

Class H coil: AWG18 Insulator O.D. 2.1 mm

Caution

Operating Environment

Warning

1. Be sure to have appropriate protective measures in

place when installed in environments where there is

the constant presence of water, such as water spray,

condensation, high humidity, etc. This product has

an IP65 protective construction; however, when

used in the above-mentioned environments, liquid

may find its way inside the enclosure through micro-

scopic gaps, possibly resulting in the burning out,

short-circuiting, or ignition of coils.

2. Do not use in an atmosphere having corrosive gases,

chemicals, sea water, or where there is direct contact

with any of these.

3. Do not use in explosive atmospheres.

4. Do not use in locations subject to vibration or impact.

5. Do not use in locations where radiated heat will be

received from nearby heat sources.

6. Employ suitable protective in locations where there

is contact with oil or welding spatter, etc.

Maintenance

Warning

1. Filters and strainers

1) Be careful regarding clogging of filters and strainers.

2) Replace filter elements after one year of use, or earlier if the

pressure drop reaches 0.1 MPa.

3) Clean strainers when the pressure drop reaches 0.1 MPa.

2. Lubrication

When using after lubricating, never forget to lubricate continuously.

3. Storage

In case of long term storage after use, thoroughly remove all

moisture to prevent rust and deterioration of rubber materials etc.

4. Exhaust the drainage from an air filter periodically.

1. Removing the product

The valve will reach a high temperature when used with high

temperature fluids. Confirm that the valve temperature has

dropped sufficiently before performing work. If touched inadver-

tently, there is a danger of being burned.

1) Shut off the fluid supply and release the fluid pressure in the

system.

2) Shut off the power supply.

3) Dismount the product.

2. Low frequency operation

Switch valves at least once every 30 days to prevent malfunc-

tion. Also, in order to use it under the optimum state, conduct a

regular inspection once a half year.

Operating Precautions

Warning

If there is a possibility of reverse pressure being applied

to the valve, take countermeasures such as mounting a

check valve on the downstream side of the valve.

2. When problems are caused by a water hammer, in-

stall water hammer relief equipment (accumulator

etc.), or use an SMC water hammer relief valve (VXR

series).

VX21/22/23 Series

Specific Product Precautions 6

Be sure to read this before handling the products.

Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid

Valve for Fluid Control Precautions.

 DIN terminal

Disassembly

1. After loosening the binding head screw with flange, then if the

housing is pulled in the direction of the arrow, the connector will

be removed from the solenoid valve.

2. Pull out the binding head screw with flange from the housing.

3. There is a cutout on the bottom of the terminal block. Insert a

small flat head screwdriver, etc. into this cutout, and remove the

terminal block from the housing. (See figure below.)

Remove the ground nut, and pull out the washer and the rubber seal.

Wiring

1. Pass the cable through the ground nut, washer and rubber seal

in this order, and insert these parts into the housing.

2. Loosen the binding head screw of the terminal block, then insert

the core wire or the crimped terminal of the lead wire into the

terminal, and securely fix it with the binding head screw. The

binding head screw of the terminal block is M3.

Note 1)

Tighten the screw to a torque of between 0.5 and 0.6 N·m.

Note 2) Cable O.D.: ø6 to ø12 mm

Note 3) For an outside cable diameter of ø9 to 12 mm, remove

the internal parts of the rubber seal before using.

Assembly

1. Pass the cable through the ground nut, washer, rubber seal and

the housing in this order, and connect to the terminal block.

Then, set the terminal block inside the housing. (Push in the

terminal block until it snaps into position.)

2. Insert the rubber seal and the washer in this order into the cable

entry of the housing, and then tighten the ground nut securely.

Insert the gasket between the bottom part of the terminal block and

the plug attached to the equipment, and then insert the binding

head screw with flange from the top of the housing, and tighten it.

Note 1)

Tighten the screw to a torque of between 0.5 and 0.6 N·m.

Note 2)

The orientation of the connector can be changed in steps

of 90° by changing the method of assembling the housing

and the terminal block.

Rated

voltage

100 VAC

200 VAC

Other AC

Black

Blue

Red

Gray

Red

Blue

Red

Gray

Lead wire color

∗ There is no polarity.

Housing

Crimped terminal

Applicable crimped terminal: JIS C2805 R1.25-3

Ground nut

Washer

Cable

Rubber seal

Binding head screw with flange

Light (When

equipped

with a light)

∗

Terminal

block

∗1

The position is fixed regardless of the electrical entry direction.

Binding

head screw

View A-A

(Internal connection diagram)

+ Mark

– Mark

Round head

combination screw

M3 Tightening torque

0.5 to 0.6 N·m

Round head combination screw

Tightening torque 0.5 to 0.6 N·m

Terminal cover

Conduit terminal

G1/2

Tightening torque

0.5 to 0.6 N·m

Make connections according to the marks shown below.

• Use the tightening torques below for each section.

• Properly seal the terminal connection (G1/2) with the special

wiring conduit etc.

Electrical Connections

CautionCaution

VX21/22/23 Series

Specific Product Precautions 7

Be sure to read this before handling the products.

Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid

Valve for Fluid Control Precautions.

 Conduit terminal

Disassembly

1. Loosen the mounting screw, and remove the terminal cover

from the conduit terminal.

Wiring

1. Insert the cable into the conduit terminal.

2. Loosen the screw with UP terminal of the conduit terminal, then

insert the core wire or the crimped terminal of the lead wire into

the terminal, and securely fix it with the screw with UP terminal.

Note 1)

Tighten the screw to a torque of between 0.5 and 0.6 N·m.

—

2: –

(+)

Grounding

1: +

(–)

Internal connections are as shown below. Make connections to

the power supply accordingly.

∗ There is no polarity.

Terminal no.

DIN terminal

+(–)

–(+)

−

Assembly

1. Insert the gasket into the conduit terminal, and then clamp the

terminal cover with the mounting screw.

Note 1)

Tighten the screw to a torque of between 0.5 and 0.6 N·m.

Note 2) When changing the orientation of the conduit terminal,

carry out the following procedure.

1. Apply a tool (monkey wrench, spanner, etc.) to the width

across flats of the conduit terminal, and turn the terminal in

the counterclockwise direction.

2. Loosen the lock nut.

3. Turn the conduit terminal in the clamping direction (clockwise

direction) to about 15° ahead of the desired position.

4. Turn the lock nut by hand to the coil side until it is lightly

tightened.

5. Apply a tool to the width across flats of the conduit terminal,

and turn it to the desired position (through an angle of about

15°) so as to clamp the conduit terminal.

Note) When changing the orientation by applying additional

tightening force to the conduit terminal from the factory-

set position, turn no more than one half a turn.

Light (When equipped with a light)

SMC

Conduit terminal

Lock nut

Grounding

Cable connector

Crimped terminal

Applicable crimped terminal:

JIS C2805 R1.25-3

Screw with

UP terminal

Gasket

Mounting screw

Terminal cover

 Conduit terminal

DIN (EN175301-803) Terminal

This DIN terminal corresponds to the Form A DIN connector with

an 18 mm terminal pitch, which complies with EN175301-803B.

VX2

VXK

VXD

VXZ

VXS

VXB

VXE

VXP

VXR

VXH

VXF

VX3

VXA

VX2

Caution

Electrical Circuits

Caution

Electrical Connections

Without electrical option

DIN terminal, Conduit terminalGrommet, DIN terminal,

Conduit terminal, Conduit

[AC circuit]

DIN terminal, Conduit terminal

With light/surge voltage suppressor

With surge voltage suppressor

Grommet, DIN terminal,

Conduit terminal, Conduit

Without electrical option

Grommet, Flat terminal

[DC circuit]

∗ For AC (Class B), the standard product is equipped with surge voltage

suppressor.

One-touch Fitting

Caution

For information on handling One-touch fittings and on

appropriate tubing, refer to page 77 and the Fittings &

Tubing section of the “Handling Precautions for SMC

Products” on the SMC website.

VX21/22/23 Series

Specific Product Precautions 8

Be sure to read this before handling the products.

Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid

Valve for Fluid Control Precautions.

Class B coil: AWG20 Insulator O.D. 2.5 mm

Class H coil: AWG18 Insulator O.D. 2.1 mm

Lead wire

Seal

Wiring conduit

(Bore size G1/2 Tightening torque 0.5 to 0.6 N·m)

 Conduit

When used as an IP65 equivalent, use seal to install the wiring

conduit. Also, use the tightening torque below for the conduit.

∗ There is no polarity.

Note) Please order separately.

Rated voltage

100 VAC

200 VAC

Other AC

Black

Blue

Red

Gray

Red

Blue

Red

Gray

Lead wire color

Description

Seal VCW20-15-6

Part no.

Light

Varistor

Rectifier

element

Rectifier

element

Varistor

SOL.

2 (–, +)

1 (+, –)

SOL.

Light

2 (–, +)

1 (+, –)

2 (–, +)

1 (+, –)

SOL.