SMC Networks VP4 Series Operation Manual - Vp4
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VP4
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50
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-OMC0001-B
Manifold Specification
1. When using 4 or more stations on the manifold, supply pressure
from both sides of P port.
2. If several manifold valves are used at the same time, pressure
drop may occur.
VP4350 (Closed Center) Type Precautions
Precautions at intermediate stop state of actuator
1) Extreme caution should be taken when exhausting or decreasing
supply pressure to P port with an actuator in the intermediate
stop state, as the actuator may move due to the change of
holding pressure of actuator. (This valve is designed so that air
pressure of A or B port will be exhausted by the residual pressure
exhausting circuit in the valve when there is no air pressure left
at P port in the intermediate stop state.)
2) Make sure there is no leakage from the piping and fittings. Check
for leakage using soapy water.
Note) VP4350 is a closed center valve which performs intermediate
stop of actuator by holding pressure on the actuator side.
In some cases intermediate stop cannot be performed if there
is leakage from the valve, actuators, piping or other equipment.
VP4450 (Exhaust Center) Type Precautions
Precautions at intermediate stop state of actuator
In the neutral condition, pressure of A and B sides is exhausted
from EA and EB respectively (exhaust center type). Therefore, no
air pressure is applied to both ports of the actuator in this condition
and so the actuator can easily be operated by external force.
Particular care should be taken for a vertically mounted actuator, as
it may move down due to its weight or load.
In the initial (neutral) condition, the pressure on both sides of the
actuator is 0 (atmospheric pressure), so when it changes to the
operating condition, pressure is supplied to only one side of the
actuator, so the cylinder rod may lurch.
How to Use DIN Terminal
1. Disassembly
1) The connector can be removed from the valve by loosening the
screw (1), then pulling the cover (4).
2) Pull out the screw (1), then remove the gasket (2a) or (2b).
3) On the bottom part of the terminal block (3), there is a cut-out
(indicated by arrow) (3a). If a small flat head screwdriver is
inserted into the cut-out in the bottom, the terminal block (3) can
be removed from the cover (4).
4) Remove the cable gland (5), plain washer (6) and rubber seal
(7).
2. Wiring
1) Pass cable (8) through cable gland (5), plain washer (6), and
rubber seal (7) in that order, and then insert into the cover (4).
2) As shown below, strip the outer layer of cable (8) and crimp the
crimped terminal (9) on to the ends.
Note) Wire the power leads of the cable to No.1 and 2 terminals.
(The solenoid valve does not have polarity.)
3) Remove the screw with washer (3f) from the bracket (3e). (For
Y-shape type terminal, loosen the screw.) Mount crimped
terminal (9) as shown below, and then re-tighten the screw (3f).
Note) Tighten within the tightening torque of 0.5N
・
m+/-15%.
Note: a) Wiring is possible with a bare lead wire. In this case,
loosen the screw with washer (3f) and place a lead wire
(3d) into the bracket, and then re-tighten the screw.
b) Maximum size of crimped terminal (9) is up to
1.25mm
2
-3.5 for O type terminal, and up to 1.25mm
2
-4
for Y type terminal.
c) For cable (8), use cables with external diameters of
φ
6 to
φ
12mm
Note) For cables with external diameters between
φ
9 to
φ
12mm, remove the inside parts of the rubber seal (7)
before using.
3. Assembly
1) Re-insert terminal block (3) into cover (4).
(Push it down until you hear a click sound.)
2) Ensure rubber seal (7) and plain washer (6) are on the cable in
this order and insert them into the entry in the cover (4), then
tighten the cable gland (5) securely.
3) Insert gasket (2a) or (2b) between the bottom part of the
terminal block (3) and the plug on the equipment, screw in
screw (1) from the top of the cover (4) and tighten it.
Note 1) Tighten within the tightening torque of 0.5N
・
m+/-20%.
Note 2) The orientation of the connector can be changed by
90
o
increments, by attaching the cover (4) in the
desired direction to the terminal block (3).
DlN Terminal (Connection)
The solenoid is wired with male terminals of DIN connector as
shown below. Connect with corresponding terminals of the
connector.
Can be used as either “+ COM” or “– COM”.
Caution
Caution
Be sure to read this before handling.
VP4
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50/VP4
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70/VVP4
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0 Series
Specific Product Precautions 1
Closeup
Self-up screw