8
1. Operate the switch only within the specified
voltage.
Use of the switch outside the range of the specified voltage can
cause not only malfunction and damage of the switch but also
electrocution and fire.
2. Do not exceed the maximum allowable load
specification.
A load exceeding the maximum load specification can cause
damage to the switch or shorten its operating life span.
3. Do not use a load that generates surge
voltage.
Although surge protection is installed in the circuit at the output
side of the switch, damage may still occur if a surge is applied
repeatedly. When a surge generating load such as a relay or
solenoid is directly driven, use a type of switch with a built-in
surge absorbing element.
4. Since the type of applicable fluid varies de-
pending on the product, be sure to verify the
specifications.
The switches do not have an explosion proof rating. To prevent
a possible fire hazard, do not use with flammable gases or
fluids.
5. Strictly adhere to the rated pressure range
and the maximum withstand pressure.
Operating the switch under pressures exceeding the range may
cause the switch to malfunction.
If surge pressures exceeding the maximum withstand pressure
are likely to arise, take measures to prevent such surge
pressures from being applied to the switch. Operating the
switch under pressures exceeding the maximum operating
pressure may destroy the switch. 1. Perform periodic inspections to ensure
proper operation of the switch.
Unexpected malfunctions may cause possible danger.
2. Take precautions when using the switch for
an interlock circuit.
When a pressure switch is used for an interlock circuit, devise a
multiple interlock system to prevent trouble or malfunctioning.
Verify the operation of the switch and interlock function on a
regular basis.
Warning Warning
Warning
1. If the equipment is not operating properly, do
not continue to use it.
Connect air and power after installation, repairs, or
modifications, and verify proper installation. The switch should
be checked for proper operation and possible leaks.
2. Apply wrench only to the metal part of the
main housing when installing the pressure
switch onto the system piping.
Do not apply a wrench to the body part as this may damage the
switch.
Warning
1. Never use in the presence of explosive gases.
The switches do not have an explosion proof rating. Never use
in the presence of an explosive gas as this may cause a
serious explosion.
Warning
Design and Selection Wiring
Operating Environment
Mounting
Maintenance
1. Verify the colour and terminal number when
wiring.
Incorrect wiring can cause the switch to be damaged and
malfunction. Verify the color and the terminal number in the
instruction manual when wiring.
2. Avoid repeatedly bending or stretching the
lead wire.
Repeatedly applying bending stress or stretching force to the
lead wire will cause it to break. If you believe the lead wire is
damaged and likely to cause malfunctions, replace it.
3. Confirm proper insulation of wiring.
Make sure that there is no faulty wiring insulation (contact with
other circuits, ground fault, improper insulation between
terminals, etc.). Damage may occur due to excess current flow
into a switch.
Series ISE70/75/75H
Pressure Switch Precautions 1
Be sure to read before handling.
