Omron H7BX

36
H7BX
Safety Precautions
Refer to Safety Precautions for All Counters.
Minor injury due to electric shock may occasionally
occur. Do not touch any of the terminals while power is
being supplied.
Fire may occasionally occur. Tighten the terminal
screws to a torque of 0.5 to 0.6 N·m (4.4 to 5.3 in-lb).
Minor injury due to explosion may occasionally occur.
Do not use the H7BX where subject to flammable or
explosive gas.
If the output relay is used beyond its life expectancy, its
contacts may become fused or there may be a risk of
fire.
Use the output relay within its rated load and electrical
life expectancy. The life expectancy of the output relay
varies considerably according to its usage.
Minor electric shock, fire, or malfunction may
occasionally occur. Never attempt to disassemble,
modify, or repair the H7BX or touch any of the internal
parts.
Operating Environment
• The H7BX is intended for indoor use only. Do not use the H7BX
outdoors or in any of the following locations.
• Locations subject to sudden or extreme changes in temperature.
• Locations where high humidity may result in condensation.
• Locations subject to direct sunlight.
• Locations subject to corrosive gas.
• Locations subject to excessive dust or dirt.
• This is a class A product (for industrial environments). In residential
areas, it may cause radio interference, in which case the user may
be required to take adequate measures to reduce interference.
• Use the H7BX within the specified ratings for operating
temperature and humidity. Temperature rise may shorten the
service life of H7BX if it is used near a power supply or other
heat-generating objects.
• Use the H7BX within the specified ratings for vibration, shock, and
splashing water.
• The H7BX is not oil resistant. Do not use it in locations subject to
oil.
• Install the H7BX well away from any sources of excessive static
electricity, such as pipes transporting molding materials, power, or
liquids.
• Store the H7BX within the specified ratings. If the H7BX has been
stored at temperatures of −10°C or lower, let it stand for 3 hours or
longer at room temperature before turning ON the power supply.
Power Supply
• Maintain voltage fluctuations in the power supply within the
specified range.
• Internal elements may be destroyed if a voltage beyond the rated
voltage is applied.
• When the power is turned ON, an inrush current will flow for a short
time (approx. 10 A for 2 ms). Depending on the power supply
capacity, operation may not start. Be sure to use a power supply
with a sufficient capacity.
• Use a commercial power supply as the AC power supply for the
H7BX. Using an inverter output with an output frequency of 50/60
Hz as the power supply may cause the H7BX to produce smoke or
become damaged by burning.
• Use a switch, relay, or other device with contacts so that the rated
power supply voltage will be reached within 2 s. If the power supply
voltage is not reached quickly enough, the outputs may
malfunction.
• Use a switch, relay, or other device with contacts so that the rated
power supply voltage will be reached within 2 s. If the power supply
voltage is not reached quickly enough, the outputs may
malfunction.
Installation and Wiring
• To mount the H7BX to a panel, attach the two supplied adapters to
the left and right sides of the H7BX, and securely tighten the
knurled screws on the adapters by hand, maintaining a balance
between them. Damage may result if the knurled screws are
excessively tightened with pliers or other tools.
• Be sure to wire the terminals correctly.
• Up to two wires of the same size and type can be inserted into a
single terminal.
• Do not connect more than two crimp terminals to each H7BX
terminal.
• Use the specified wires for wiring.
Applicable wire: AWG 24 to AWG 18 (equal to a cross-sectional
area of 0.20 to 0.82 mm
2
)
Solid wire or twisted wire (copper), operating temperature over
70°C.
• Separate the H7BX, the devices that generate input signals, and
input signal wires from any potential sources of noise, such as
high-voltage lines.
Handling
• Do not use organic solvents (such as paint thinner or benzine),
strong alkaline, or strong acids because they will damage the
external finish.
• Approximately 14 V will be output to the input terminals when the
H7BX is used with the key protection input terminals and
no-voltage input (NPN input) is used. To prevent charging
accidents, connect a diode to the power supply circuit of input
devices if input devices are used with a power supply of less than
14 V.
• Do not connect loads that exceed the rated output current. The
output elements may be destroyed, possibly resulting in
short-circuit or open-circuit faults.
• When using heaters, be sure to use a thermal switch for the load
circuit.
• Always connect a diode to protect against counter electromotive
force when using an inductive load. H7BX electromotive force may
destroy output elements, possibly resulting in short-circuit or
open-circuit faults.
• Install a switch or circuit breaker that allows the operator to
immediately turn OFF the power, and label it to clearly indicate its
function.
• Check that the display (backlight and LCD) is operating normally.
Some operating environments may accelerate deterioration of the
indicators, LCD, and resin components and cause display
malfunctions. Periodically inspect and replace parts.
Caution
Precautions for Safe Use