Precautions For Correct Use - Omron H5CC Manual

Precautions for Correct Use

• Read this manual carefully before using the product.
• An inrush current of approx. 14 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 Timer 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.
• When turning the power ON and OFF, input signal reception is
possible, unstable, or impossible as shown in the diagram below.
To allow for the startup time of peripheral devices (sensors, etc.),
the Timer starts timing operation between 200 to 250 ms after
power is turned ON. For this reason, in operations where timing
starts from power ON, the time display will actually start from 249
ms. If the set value is 249 ms or less, the time until output turns ON
will be a fixed value between 200 and 250. The present value
display will start from 250 ms. (Normal operation is possible for set
values of 250 ms or more.) In applications where a set value of 249
ms or less is required, use start timing with signal input.
• Note that the input signal will not be accepted after 5 to 505 ms has
elapsed from when the power supply is turned OFF in the case of
the H5CC-A@/L8@, after 5 to 105 ms has elapsed from when the
power supply is turned OFF in the case of the H5CC-A11F, and
after 5 to 1005 ms has elapsed from when the power supply is
turned OFF in the case of the H5CC-AU@.
ON
Power Supply
OFF
200 ms
Input Impossible
• 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 14 A.
• 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 Timer 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.
• Check all wiring before you turn ON the power supply to the Timer.
• Doing so may cause incoming radio wave interference. Do not use
the product near radio wave receivers.
• Install product so that the load doesn't span the product body.
• H5CC models with a 24 to 240-VAC/24 to 240-VDC power supply
use a transformerless power supply system in which the power
supply terminals are not isolated from the signal input terminals.
Unwanted current paths may occasionally burn or destroy internal
components depending on the wiring. Always check the wiring
sufficiently before use.
• Do not wire the terminals which are not used.
• If there is a transformer or other device with a large inductance
component on the power line, the inductance will cause a reverse
voltage. If that occurs, insert a CR filter in the power line to reduce
the reverse voltage.
0 to 100 ms (H5CC-A11F)
0 to 500 ms (H5CC-A@/L8@)
0 to 1000 ms (H5CC-AU@)
0 to 50 ms 5 ms
Unstable Possible Unstable Impossible
• Do not use in a circuit with the waveform that is distorted. The error
will increase due to the influence of the distorted waveform.
• The capacity of the external power supply is 100 mA at 12 V.
When using an H5CC-AUD external power supply, reduce the load
with the power supply voltage, as shown in the following diagram
(DC power supplies only).
100
20
10.8
Power supply voltage (VDC)
H5CC
15
41