Pressure regulation needle (red)
High
Low
Pressure adjustment screw
Pressure needle (black)
MPa
-
+
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
1
0.9
0
Handling instructions and Precautions
Pressure gauge with built-in switches
Mounting and piping
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 wrench on the
piping connection port hexagonal section. Use a tightening torque of
2.21 to 3.69 ft
•
lbf if the pressure gauges are mounted on the
pressure port plate with NPT1/4.
Pressure regulation
Rotate the pressure adjustment screw, align the pressure regulation
needle (red) to the set pressure, and set. Rotating the pressure adjustment
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 less
than the setting pressure 10 psi (response differential), the switch is
returned to the original state.
Switch setting method and operations
Setting example: Want the switch to activate when the pressure is at 43.5 psi or less.
Wiring instructions
Pay attention to the NC and NO contacts and the colors of lead wires (in
wires with connectors, the terminal numbers) for wiring. In the diagram
below, the numbers in parentheses ( ) represent the terminal numbers,
while the
⬆
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.
General precautions
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 113°F or where the humidity is constantly
50% or less. For use in these kinds of places, consult us.
3. If there is silicon gas in the ambient atmosphere, it may cause a contact
failure because the contact operation uses micro switches. If there is
silicon oil or silicon products in the vicinity of the product, eliminate the
source of the silicon gas or use a contact protection circuit (for AC).
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 0.31 in 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 ter-
minal body until they bump up against the lead wire stopper, lower the
contact from above to the lead wire, and use pliers to push them into
firm contact, so that the contacts are touching the core wire.
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 adjustment screw.
2. The pressure needle has an indication error of
±
7 psi. For
fine-tuning adjustment, apply compressed air at the set
pressure to check the switch triggering action.
●
Wiring instructions with DIN connector
Indicator lights
Pressure switch
setting
Pressure regulation
needle (red needle)
Pressure needle
(black needle)
０
0.2
0.8
1
0
（
MPa
）
psi
30
150
120
−
＋
0.6
0.4
60
90
COM: Black (1)
(−)
NC: Red (3)
NO: White (2)
Load
(
＋
)
COM: Black (1)
NC: Red (3)
NO: White (2)
Load
Pressure
increasing
０
0.2
0.8
1
0
（
MPa
）
psi
30
150
120
−
＋
0.6
0.4
60
90
Response differential:
Maximum 10 psi
０
0.2
0.8
1
0
（
MPa
）
psi
30
150
120
−
＋
0.6
0.4
60
90
Terminal
body
Pliers
Lead wire
Cable
Cable ground
Cable gasket
Washer
Gasket
Contact
Terminal body
Lead wire
Terminal
cover
Gasket
Cover
mounting
screw
Lead wire
stopper
JIS C3306
VCTF conductor
0.00116 in
2
Finish outside diameter 0.260 in (2 wires)
0.276 in (3 wires)
NOTE
NC: Red (3)
NO: White (2)
Load
(
＋
)
NC: Red (3)
NO: White (2)
Load
COM: Black (1)
(−)
COM: Black (1)
●
24 VDC
●
100 VAC, 200 VAC
●
24 VDC
●
100 VAC, 200 VAC
Set the pressure regulation needle (red needle) to
43.5 psi. When the pressure is in the range of 0 to
43.5 psi., the built-in switch remains at NC, as shown
in the circuit diagram above, and the indicator lamp
lights up.
When the pressure supply increases, close to the pres-
sure regulation needle (red needle), the built-in switch
flips to NO, as shown in the circuit diagram above, the
load current flows, and the indicator lamp goes out. The
position at this time is A. At this time switching position A
has a maximum 14.5 psi differential in relation to the pres-
sure needle (black needle) because of a pressure needle
tolerance of
±
7 psi and repeatability accuracy of
±
7 psi
have accumulated.
When the pressure falls, and the pressure needle
(black needle) is higher than the pressure regula-
tion needle (red needle), the internal switch chang-
es to NC with a maximum response differential of
10 psi. When this happens, check the switching
position and adjust the pressure regulation needle
(red needle). Note that NC cannot be used as a
load contact. Use the switching of NO to OFF by
controlling a relay or other B-contact device.
NC: Red (3)
NO: White (2)
Load
COM: Black (1)
●
24 VDC
●
100 VAC, 200 VAC
NC: Red (3)
NO: White (2)
Load
(
＋
)
COM: Black (1)
(−)
For the connector type, the connector wiring position at time of delivery
is in the connecting thread side (back side).
NOTE
