Handling Instructions and Precautions
●
Pressure gauges with electronic switches
x
Precautions
Mode switching input (for output operations switching):
Pink
0V:
Blue
External wiring example
Internal circuit
100mA MAX.
＋
V: Brown
Load
D
ZD
Tr
DC12〜24V
±10％
Main circuit
Output: Black
Note
Note: When the mode switching input line is open, the output is NO.
When the mode switching input line is closed, the output is NC.
D : Reverse current protection diode for power supply
Tr : NPN output transistor
ZD: Zener diode for surge voltage absorption
Power supply
・
If using a commercial switching regulator for the power supply,
always ground it with a frame ground (F.G.) terminal.
・
Avoid using the product while it is in a transitory state (about 0.5sec)
immediately after the power supply has been switched on.
・
For direct current power supply, always use an insulated
transformer. Use of an autotransformer (single-winding transformer)
could damage the product and the power supply.
・
If surges appear in the power supply, connect a surge absorber to
the source of the surge.
Input/output
・
Use surge protection when connecting the inductive loads such as
DC relays to the load.
Wiring
・
Avoid wiring parallel to high voltage lines or power lines, or use in
the same wiring conduits. Induction could cause erratic operation.
・
Always shut off the power supply before performing wiring work.
・
Keep wiring lengths as short as possible to avoid electric noise
problems.
Environment
・
When using equipment that could be sources of electric noise (such
as switching regulators, inverter motors, etc.) around the sensor
installation area, ground them with an equipment’s frame ground
(F.G.) terminal.
・
Avoid use in steamy or dusty locations, or in locations that are
directly subject to dripping water.
・
The product cannot be used when the media or the ambient
atmosphere contains any of the substances listed below.
Organic solvents, phoshate ester type hydraulic oil, sulphur dioxide,
chlorine gas, or acids, etc.
Detection
・
Do not put wires or other foreign objects inside the pressured area.
・
This product is for use with non-corrosive gases. Be aware that it
cannot be used with liquids or with corrosive gases.
Mounting
・
Always thoroughly blow off (use compressed air) or air blowing the
tubing before piping. Be careful to prevent chips, sealing tape, or
rust, etc., generated during plumbing from entering into the pipes.
・
When connecting a fitting to a piping connection port, mount by using
a wrench on the hexagonal section of the port. The tightening torque
for R1/4 (male thread) should be 20N
・
m [14.8ft
・
lbf] or less, and for
M5
×
0.8 (female thread), 2.0N
・
m [1.48ft
・
lbf]or less.
・
Never perform tightening on any other section.
Setting
・
Use a setting value that provides plenty of margin for the operating
ambient temperature, power supply, voltage, and other conditions.
c
Body mounting
z
Input/output circuit diagram
14mm wrench
b
Error indication
v
Mounting parts for panel mounting, and
protective front cover
●
If the LED indicates as shown below, it means that over
current is flowing to the load, and output has short-circuited.
First, shut off the power supply, and then check the load and
output.
Short-circuit error
EG120
EG110
Panel plate
Mounting body
Pressure gauge
Protective front cover
(Sold separately)
Mounting holder
Groove on panel mounting body
1)
2)
3)
4)
1) Mount from the
front of the panel
hole, and insert the
mounting body.
2) Insert the pressure
gauge from the
back of the
mounting body.
3) From the back of
the position shown
in 2) above, insert
the mounting holder
into the groove on
the mounting body.
4) Set the protective
front cover sold
separately.
※
To remove, use a screwdriver, etc.,
to perform the above mounting
procedure in reverse steps, and
remove the mounting holder.
●
As the mounting screws for the piping connection port are the
R1/4 tapered thread or the M5 female thread, various
commercial fittings can be used.
●
For direct mounting on piping, use a 14mm wrench on the
hexagonal section, do not exceed a torque value of 20N
・
m
[14.8ft
・
lbf]. Do not use the wrench on the body case.
When the M5 female thread is used, do not exceed a torque
value of 2.0N
・
m [1.48ft
・
lbf].