Selection
Warning
1. Operation
Refer to the instruction manual for the operation of the digital
pressure switch.
2. Pressure port
Do not introduce any wire or similar object to a pressure port as
this may damage the pressure sensor and cause a malfunction.
Mounting
Warning
1. Do not wire conjunction with power lines or
high voltage lines.
Wire separately from power lines and high voltage lines, avoiding
wiring in the same conduit with these lines. Control circuit
including the switches may malfunction due to noise from these
other lines.
2. Do not allow loads to short circuit.
Although digital pressure switches indicate excess current error if
loads are short circuited, all incorrect wiring connections cannot be
protected. Take precautions to avoid incorrect wiring.
As for other pressure switches, the switches will be instantly
damaged if loads are short circuited. Take special care to avoid
reverse wiring between the brown power supply line and the black
output line.
3. Connect a DC (-) wire (blue) as close as
possible to the DC power supply GND
terminal.
Connecting the power supply away from the GND terminal can
cause malfunctions due to noise from devices that are connected
to the GND terminal.
4. Do not attempt to insert or pull the pressure
sensor or its connector when the power is
on.
Wiring
Warning
1. Monitor the internal voltage drop of the
switch.
When operating below a specified voltage, it is possible that the
load may be ineffective even though the pressure switch function
is normal. Therefore, the formula below should be satisfied after
confirming the minimum operating voltage of the load.
Caution
1. Use the switch within the specified fluid and
ambient temperature range.
Ambient and fluid temperature operation is as follows:
Digital pressure switches: 0
to 50
C
Take measures to prevent moisture from freezing in circuits when
below 5
C, since this may cause damage to the O-ring and lead to
a malfunction. The installation of an air dryer is recommended for
eliminating condensate and moisture. Never use the switch in an
environment where there are drastic temperature changes even
when these temperatures are operated within the specified
temperature range.
2. Compound pressure switch
Although application of a momentary pressure around 0.5 MPa will
not affect the performance (at the time of vacuum break), be
careful to not to apply constant pressure of 0.2 MPa or more.
Warning
Pressure Source
1. Do not use in an area where surges are gen-
erated.
When there are units that generate a large amount of surge in the
area around pressure switches (e.g., solenoid type lifters, high
frequency induction furnaces, motors), this may cause
deterioration or damage to the switches’ internal circuitry. Avoid
and protect against sources of surge generation and crossed
lines.
Operating Environment
Warning
Maintenance
Caution
1. Da
ta of
the digital pressure switch will be
stored even after the power is turned off.
Input data (set pressure, etc.) will be stored in EEPROM so that
the data will not be lost after the pressure switch is turned off.
(Data will be stored for up to 100,000 hours after the power is
turned off.)
— >
Supply
voltage
Internal voltage
drop of switch
Minimum operating
voltage of load
1. Cleaning of the switch body.
Wipe off dirt with soft cloth. If dirt does not come off easily, use a
neutral detergent diluted with water to dampen a soft cloth. Wipe
the switch only after squeezing the excess water out of the
dampened cloth. Then finish off by wiping with a dry cloth
afterwards.
19
Approved
Series
ZSE F/ISE
Digital 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.
50
60
50
60
ZSE/ISE 4/21/02 1:15 PM Page 22
