Series
ZSE F/ISE
Pressure Switch Precautions
Be sure to read before handling. Refer to pages 17 through 19 for safety instructions and pressure
switch precautions, and to page 20 for specific product precautions.
18
Approved
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 to the switch but also
electric shocks 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.
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. The fluid compatibility varies among prod-
ucts. Be sure to confirm the specifications.
The switch does not have an explosion proof rating.
To prevent a possible fire hazard, do not use with flammable
gases or fluids.
5. Operate the switch within the regulating pre-
ssure range and maximum operating
pressure.
Malfunction can occur if the pressure sensor is used outside the
regulating pressure range, and the sensor may be permanently
damaged if used at a pressure that is above the maximum
operating pressure.
1. Confirm the colors and terminal numbers of
cords when wiring.
Incorrect wiring can cause the switch to be damaged and
malfunction. Verify the colors and terminal number in the instru-
ction manual when wiring.
2. Avoid repeatedly bending or stretching lead
wires.
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.
Wiring
Design and Selection
1. Perform periodic inspections to ensure pro-
per operation of the switch.
Unexpected malfunctions or incorrect operation 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.
Maintenance
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. Mount switches using the proper tightening
torque.
When a switch is tightened beyond the specified tightening torque,
the mounting screws, mounting bracket, or switch may be
damaged. On the other hand, tightening below the specified
tightening torque may cause the installation screws to come loose
during operation.
Mounting
Warning
Nominal thread size
M5
R 1/4, NPT 1/4, G 1/4, URJ 1/4, TSJ 1/4
Proper tightening torque N
.
m
1/6 rotation after tightening by hand
13.6N.m
3. 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 resin part as this may damage the
switch.
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.
Operating Environment
Warning
50
60
50
60
ZSE/ISE 4/21/02 1:15 PM Page 21
