MP
a
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
1
0.9
0
Regulating pressure indicator (red)
Pressure regulation screw
Pressure indicator (black)
High
Low
Handling Instructions and Precautions
Pressure gauges with built-in switch
1.
While any mounting direction is acceptable, install a throttle
mechanism in cases where pressure pulsation is particularly
severe, such as when mounted between a valve and an actuator.
For mounting in locations subject to strong vibrations, consult us.
2.
During mounting and piping operations, do not grab the pressure
gauge body to tighten. For tightening, always use a hexagonal
wrench on the piping connection port section.
Rotate the pressure regulation screw, align the regulating pressure
indicator (red) to the set pressure, and set. Rotating the pressure
regulation screw to the left (counterclockwise) sets to a higher
pressure, and rotating it to the right (clockwise) sets to a lower
pressure. When the air pressure rises to the set pressure, the switch
is activated, and when it falls to the setting pressure of 0.05MPa
[7psi.], the switch is returned to the original state.
Pressure regulation
Mounting and piping
Setting example: Want the switch to activate when the pressure is at
0.3MPa or less.
Switch setting method and operations
Pay attention to the NC and NO contacts and the colors of lead wire (in wires
with connectors, the terminal numbers) for wiring. In the figure below, the
numbers in parentheses ( ) represent the terminal numbers, while the arrow
c
shows the direction of rising pressure. The indicator lamp switches off
when the value is at the set pressure or higher, and lights up as a warning
when the value falls below the set pressure.
Wiring instructions
1. Use this product to check the supply pressure. For use in precision control
circuits, consult us.
2. Switch performance may be degraded in installation locations where the
temperature is higher than 45˚C [113°F] or where the humidity is constantly
50% or less. For use in these kinds of places, consult us.
General precautions
When peeling off the sheath (for cabtyre sheath only), pay attention to the
lead wire bending direction. Setting the outer lead wires inside the terminal
cover to be about 8mm longer than the inner wires can make it easier to
mount the terminal body onto the terminal cover. Without peeling off their
insulations, insert the lead wires into the terminal body until they bump up
against the lead wire stopper, lower the contacts from above to exposed
wires, and use pliers to push them into firm contact, so that the contacts are
touching the exposed wires.
Caution:
For the connector type, the connector wiring position at time of delivery is in
the connecting thread side (back side).
Cautions: 1.
To regulate the pressure, do not remove the cap on the lens
surface, but insert a small screwdriver into a slit in the cap
instead, and directly rotate the pressure regulation screw.
2.
The pressure needle has a indication error of 0.05MPa [7psi.]. For
fine-tuning adjustment, apply compressed air at the set pressure to
check the switch triggering action.
●
Wiring instructions with DIN connector
●
DC24V
●
AC100V, AC200V
（＋）
COM: Black (1)
（−）
COM: Black (1)
NC: Red (3)
NO: White (2)
Load
NC: Red (3)
NO: White (2)
Load
●
DC24V
●
AC100V, AC200V
（＋）
COM: Black (1)
（−）
COM: Black (1)
NC: Red (3)
NO: White (2)
Load
NC: Red (3)
NO: White (2)
Load
MPa
-
+
0.1
0.2
0.3
0.4
0.5 0.6
0.7
0.8
1
0.9
0
Indicator lamp ON
Pressure switch setting
Regulating pressure
indicator (red)
Pressure indicator
(black)
●
DC24V
●
AC100V, AC200V
COM: Black (1)
（−）
（＋）
COM: Black (1)
NC: Red (3)
NO: White (2)
Load
NC: Red (3)
NO: White (2)
Load
MPa
-
+
0.1
0.2
0.3
0.4
0.5 0.6
0.7
0.8
1
0.9
0
Pressure rising
MPa
-
+
0.1
0.2
0.3
0.4
0.5 0.6
0.7
0.8
1
0.9
0
Hysteresis: 0.07MPa max.
Cable
Cable gland
Cable gasket
Washer
Gasket
Cover
mounting
screw
Lead wires
Terminal
cover
Gasket
Terminal body
Contact
Lead wire
stopper
Pliers
Terminal body
Lead wires
JIS C3306
VCTF electric conductor 0.75mm
2
Finished outer diameter 6.6 (2-lead)
7.0 (3-lead)
Set the regulating pressure indicator (red needle) to
0.3MPa [44psi.]. But because the regulating
pressure indicator has a maximum error of
0.05MPa [7psi.], always apply compressed air
regardless of the position the needle is pointing to
on the indication scale, adjust the pressure, and
use a multimeter, etc., to check whether the built-in
switch goes to OFF when the pressure drops to
0.3MPa [44psi.] or below.
When the pressure is in the range of 0MPa
〜
0.3
MPa [0
〜
44psi.], the built-in switch remains at NC,
as shown in the circuit diagram above, and the
indicator lamp lights up.
When the pressure rises, and the regulating
pressure indicator (red needle) exceeds 0.3MPa
[44psi.], the built-in switch flips to NO, as shown in
the circuit diagram above, the load current flows,
and the indicator lamp goes out.
When the pressure falls, and the pressure indicator
(black needle) is higher than the regulating pres-
sure indicator (red needle), the internal switch
changes to NC with a maximum hysteresis of
0.07MPa [10psi.]. At this time, the repeatability is a
maximum
±
0.03MPa [
±
4psi.].
Note that NC cannot be used as a load contact.
Use the switching of NO to OFF to control the relay
or other B contact.
To obtain finer accuracy than the above example,
we recommend using:
●
Digital pressure gauge with built-in sensor
●
Digital pressure switches
