H7CZ
18
• 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.
• Maintain voltage fluctuations in the power supply within the
specified operating voltage range.
• When turning the power ON and OFF, input signal reception is
possible, unstable, or impossible as shown in the diagram below.
• 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.
• 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).
• EEPROM is used as backup memory when the power is
interrupted. The write life of the EEPROM is 100,000 writes. The
EEPROM is written at the following times:
• When the power supply is turned OFF
• When switching from Configuration Selection Mode or Function
Setting Mode to Run Mode
• Dispose of the product according to local ordinances as they apply.
• 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.
Precautions for Correct Use
Inp
u
t
Impossi
b
le
200 ms
5 ms
0 to 90 ms
0 to 1 s
Possi
b
le
Unsta
b
le
Unsta
b
le Impossi
b
le
Po
w
er
s
u
pply
O
N
OFF
Conformance to EN/IEC Standards
