Precautions For Safe Use - Omron H7CC-A Series Manual

H7CC-@

Precautions for Safe Use

• When mounting the Counter to a panel, tighten the two mounting
screws alternately, a little at a time, so as to keep them at an equal
tightness. If the panel screws are tightened unequally, water may
enter the panel.
• Store the Counter at the specified temperature. If the Counter has
been stored at a temperature of less than
−10°C, allow the Counter to stand at room temperature for at least
3 hours before use.
• Mounting the Counter side-by-side may reduce the life
expectancies of internal components.
• Use the Counter within the specified ranges for the ambient
operating temperature and humidity.
• Do not use or store the product in the following locations:
• Locations subject to sudden or extreme changes in temperature.
• Locations subject to oil.
• Locations where high humidity may result in condensation.
• Locations prone to icing.
• Locations with excessive vibration or shock.
• Locations subject to exposure chemicals.
• Locations subject to water.
• Locations subject to bugs and small animals
• Do not use this Counter in dusty environments, in locations where
corrosive gasses are present, or in locations subject to direct
sunlight.
• Install the Counter well away from any sources of static electricity,
such as pipes transporting molding materials, powders, or liquids.
• Internal elements may be destroyed if a voltage outside the rated
voltage range is applied.
• Be sure that polarity is correct when wiring the terminals.
• Separate the Counter from sources of noise, such as devices with
input signals from power lines carrying noise, and wiring for I/O
signals.
• Do not connect more than two crimp terminals to the same
terminal.
• Up to two wires of the same size and type can be inserted into a
single terminals.
• Use the specified wires for wiring.
Applicable Wires: AWG 18 to AWG 22, solid or twisted, copper
(Wire material: Copper)
• Install a switch or circuit breaker that allows the operator to
immediately turn OFF the power, and label it to clearly indicate its
function.
• When the Counter is operated with no-voltage input (NPN input),
approximately 14 V is output from the input terminals. Use a sensor
that contains a diode.
0 V
• Use a switch, relay, or other contact so that the rated power supply
voltage will be reached within 0.1 seconds. If the power supply
voltage is not reached quickly enough, the Counter may
malfunction or outputs may be unstable.
• Use a switch, relay, or other contact to turn the power supply OFF
instantaneously. Outputs may malfunction and memory errors may
occur if the power supply voltage is decreased gradually.
• When changing the set value during operation, because the H7CC
uses a constant read-in system, output will turn ON if the set value
is equal to the present value.
• When changing the comparison value during operation, because
the H7CC uses a constant read-in system, the output status will
change if the comparison value is changed to a value on the other
side of the present value. (when using as a tachometer)
• If the set value and present value are both 0, the output will turn
ON for the default setting. The output will turn OFF during a reset
operation. (when using as a counter)
• When the power is turned ON using the factory settings, the output
will turn ON after 999.9 s if no pulses are received as count input.
62
Sensor
Diode
Input
• Do not use organic solvents (such as paint thinners or benzine),
strong alkali, or strong acids as they will damage the external
finish.
• Confirm that indications are working normally, including the
backlight LED, and LCD. The indicator LEDs, LCD, and resin parts
may deteriorate more quickly depending on the application
environment, preventing normal indications. Periodic inspection
and replacement are required.
• The waterproof packing may deteriorate, shrink, or harden
depending on the application environment. Periodic inspection and
replacement are required.