Precautions For Correct Use - Omron H7CC-A Series Manual

Precautions for Correct Use

• Read this manual carefully before using the product.
• An inrush current of approx. 10 A will flow for a short time when the
power supply is turned ON. If the capacity of the power supply is
not sufficient, the Counter may not start. Be sure to use a power
supply with sufficient capacity.
• Make sure the power supply voltage and loads are within the
specifications and ratings for the product.
• To allow for the startup time of peripheral devices (e.g., sensors) of
the Counter (Tachometer), start Counter timing operation 200 ms
to 290 ms after turning ON the power. The input signal will not be
accepted before 200 to 290 ms has elapsed.
ON
Power Supply
OFF
200 ms 0 to 90 ms
Input
Impossible Unstable
• The input signal will not be accepted after 5 to 1005 ms has
elapsed from when the power supply is turned OFF.
• Inrush current generated by turning ON or OFF the power supply
may deteriorate contacts on the power supply circuit. Turn ON or
OFF to a device with the rated current of more than 10 A.
• The capacity of the external power supply is 100 mA at 12 V. When
using a 24 VAC/12 to 48 VDC power supply, reduce the load with
the power supply voltage, as shown in the following diagram (DC
power supplies only).
100
20
10.8
• If the prescale value setting is incorrect, a counting error will occur.
Check that the settings are correct before using this function.
• Make sure that all settings are appropriate for the application.
Unexpected operation resulting in property damage or accidents
may occur if the settings are not appropriate.
• Do not leave the Counter for long periods at a high temperature
with output current in the ON state. Doing so may result in the
premature deterioration of internal components (e.g., electrolytic
capacitors). Do not install the product close contact with the
heating element.
• Non-volatile memory is used as backup memory when the power
is interrupted.The write life of the non-volatile memory is 100,000
writes. The non-volatile memory is written when the power is
turned OFF or when switching from function setting mode or
configuration selection mode to run mode.
• Dispose of the product according to local ordinances as they apply.
• Do not use because it may be damaged inside the product when
the product fall by mistake.
• Confirm the wiring the input and output terminals correctly before
power is supplied.
• Do not use the product near radio wave receivers. Doing so may
cause incoming radio wave interference.
• Do not use in a circuit with the waveform is distorted. The error will
increase due to the influence of the distorted waveform.
• Install product so that the load doesn't span the product body.
5 ms 0 to 1s
Possible Unstable Impossible
15
Power supply voltage (VDC)
Conformance to EN/IEC Standards
• When conforming to EMC standards, refer to the information
provided in this datasheet for cable selection and other conditions.
• This is a class A product. In residential areas it may cause radio
interference, in which case the user may be required to take
adequate measures to reduce interference.
• Basic insulation is provided between power supply and input
terminals, between power supply and output terminals, and
between input and output terminals.
• When double insulation or reinforced insulation is required, apply
double insulation or reinforced insulation as defined in IEC 60664
that is suitable for the maximum operating voltage with clearances
or solid insulation.
• Connect the input and output terminals to devices that do not have
any exposed charged parts.
H7CC-@
63