H8BM-R
7
Safety Precautions
Refer to
Safety Precautions for All Counters
.
Fire may occasionally occur. Tighten terminal screws
securely to a tightening torque of 0.5 to 0.6 N·m.
Minor electric shock, fire, or Product failure may
occasionally occur. Do not disassemble, modify, or
repair the Product or touch the interior of the Product.
Minor electric shock, fire, or Product failure may
occasionally occur. Do not allow any pieces of metal
or conductors or any clippings or cuttings resulting
from installation work to enter the Product.
In order to ensure safe operation, be sure to observe the
following points.
(1)
Store the Counter within the specified temperature range. If
the Counter has been stored at a temperature under
−
10
°
C, allow the Counter to stand at room temperature for
at least 3 hours before using it.
(2)
Use the Counter within the ratings specified for ambient
operating temperature and ambient operating humidity.
(3)
Do not operate the Counter in any of the following
locations.
•
Locations subject to sudden or extreme changes in
temperature.
•
Locations where high humidity may result in
condensation.
(4)
Use the Counter within the specified ratings for vibration
and shock.
(5)
Do not use the Counter in locations subject to excessive
dust, corrosive gases, or direct sunlight.
(6)
When using the Counter in environments subject to large
amounts of static electricity (e.g., pipes carrying molding
materials, powders, or fluid materials), separate the
Counter as far as possible from the sources of static
electricity.
(7)
Use the Counter within the specified ratings for vibration,
shock, water immersion, and exposure to oil.
(8)
Always use a thermo-switch on the load circuit when a
heater is used.
(9)
Do not use organic solvents (such as paint thinner or
benzene), strong alkalis, or strong acids because they will
damage the external finish of the Counter.
(10) Install a switch or circuit breaker that allows the operator to
immediately turn OFF the power, and label it to clearly
indicate its function.
(11) Be sure that all terminals are wired correctly.
(12) Do not connect more than two crimp terminals to the same
terminal.
(13) Use the specified wires for wiring.
Applicable Wires
AWG22 to AWG14
(cross-sectional area of 0.326 to 2.081 mm
2
)
Solid or twisted wires of copper
(14) Always maintain the load current within specifications.
(15) Use a switch, relay, or other contact device to turn OFF the
power supply instantaneously. Outputs may malfunction
and memory errors may occur if the power supply voltage is
decreased gradually.
(16) Up to two wires of the same size and type can be inserted
into a single terminal.
(17) Separate the input devices, input wiring, and Counter as far
as possible from sources of noise and power lines carrying
noise.
(18) The life of internal parts may be reduced if Counters are
mounted in close proximity to each other.
(19) Maintain voltage fluctuations in the power supply within the
specified range.
(20) Use a switch, relay, or other contacts so that the rated
power supply voltage will be reached within 0.1 s. If the
power supply voltage is not reached quickly enough, the
power source may fail to reset or the outputs may fall to
operate correctly.
(21) 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).
(22) Periodically inspect and replace the rubber packing. It may
deteriorate, expand, shrink, or harden in some operation
environments.
(23) Check that the backlight, output indicators, and LCD are
operating normally. Some operating environments may
accelerate deterioration of the indicators, LCD, and resin
components and cause display malfunctions. Periodically
inspect and replace parts.
(24) Be sure that the voltage applied is within the specified
range; otherwise, the internal elements of the Counter may
be damaged.
(1)
Be sure that the capacity of the power supply is sufficient.
The Counter may not start due to the capacity of the power
supply or the inrush current that may flow for an instant
(approx. 1.6 A for 12 ms) when the Counter is turned ON.
(2)
The Power Supply, input, and output circuits are electrically
isolated inside the Counter.
When turning the power ON and OFF, input signal
reception is sometimes possible, sometimes not possible,
and sometimes unstable, as shown in the diagram below.
Turn on or off the operating power source all at once by
using switch or relay contact.
(3)
EEPROM is used to back up the memory if the power fails.
Data can be written to EEPROM 100,000 times. Data is
written to the EEPROM when the settings are changed or
deleted or the power is turned OFF.
(4)
The Counter uses a constant read-in system, so outputs
will turn ON if the set values are changed during operation
such that the set value is equal to or less than the count
value.
(5)
Dispose of the Counter in accordance with all local
industrial waste disposal procedures.
(6)
The water and oil resistance will be lost if the front sheet is
peeled off or torn.
Do not use the Counter if the front sheet is peeled or torn.
CAUTION
Precautions for Safe Use
Precautions for Correct Use
Inp
u
t signal reception
Impossi
b
le
200 ms
10 ms
0 to 100 ms
0 to 900 ms
Possi
b
le
Un-
sta
b
le
Unsta
b
le
Impossi
b
le
Po
w
er s
u
pply
O
N
OFF
