Safety Precautions - Omron H7CX - DATASHEET 2 Datasheet

Safety Precautions (Common)
Note: The following precautions are common for all H7CX models.
CAUTION
Loose screws may occasionally result in fire or malfunction.
Tighten the terminal screws securely. The recommended
tightening torque is 0.5 N·m.
There may occasionally be a risk of explosion. Do not use the
product where flammable or combustion gases are present.
If the output relay is used beyond its life expectancy, its contacts
may occasionally become fused or there may occasionally be a risk
of fire. The life expectancy of the output relay varies considerably
according to its usage.
Use the output relay within its rated load and electrical life
expectancy.
This may occasionally cause electric shock, fire or malfunction.
Never disassemble, repair or modify the product.
This may occasionally cause electric shock, fire or malfunction.
Do not allow metal fragments or lead wire scraps to fall inside this
product.
Precautions for Safe Use
Operating and Storage Conditions
• Do not use in locations affected by excessive vibration or shock, or
in locations subject to exposure to water or oil.
• Do not use the product in locations subject to dust, corrosive
gases, or direct sunlight.
• Separate the input signal devices, input signal cables, and the
product from the source of noise or high-tension cables producing
noise.
• Separate the product from the source of static electricity when
using the product in an environment where a large amount of static
electricity is produced (e.g., forming compounds, powders, or fluid
materials being transported by pipe).
• Organic solvents (such as paint thinner), as well as very acidic or
basic solutions might damage the outer casing of the H7CX.
• Use the product within the ratings specified for temperature and
humidity.
• Do not use the product in locations where condensation may occur
due to high humidity or where temperature changes are severe.
• Store at the specified temperature. If the H7CX has been stored at
a temperature of less than –10 C, allow the H7CX to stand at room
temperature for at least 3 hours before use.
Usage Precautions
• Make sure that the voltage applied is within the specified range,
otherwise the internal elements of the counter may be damaged.
• The load current must be within the rated current.
• Ensure that the power is turned OFF before changing DIP switch
settings. Changing DIP switch settings with the power turned ON
may result in electric shock due to contact with terminals subject to
high voltages.
• Pay attention to terminal polarity to ensure correct wiring.
• Make sure that the fluctuation of the supply voltage is within the
permissible range.
• Apply the power supply voltage through a relay or switch in such a
way that the voltage reaches the rated value within 2 s. If the
voltage is applied gradually, the power may not be reset or unstable
output operations may result.
• Set each set value to match the item being counted (or measured).
Not matching the content of the set values with the counted (or
measured) items may cause unexpected operations resulting in
injury or damage to the equipment.
• Leaving the H7CX with outputs ON at a high temperature for a long
time may hasten the degradation of internal parts (such as
electrolytic capacitors). Therefore, use the product in combination
with relays and avoid leaving the product as long as more than 1
month with the output turned ON.
X /b T/a
2
T X
1
• When the product is operated with no-voltage input (NPN input),
approximately 14 V is output from the input terminals, so connect a
diode if the external power supply is less than 14 V.
0 V
• Install a switch or circuit-breaker that allows the operator to
immediately turn OFF the power, and make sure it is labeled
clearly.
• The H7CX's panel surface is water-resistive (conforming to NEMA
4, UL Type 4X, and IP66). In order to prevent the internal circuit
from water penetration through the space between the H7CX and
operating panel, attach a waterproof packing between the H7CX
and installation panel and secure the waterproof packing with the
Y92F-30 Flush-mounting Adapter.
0.5 to 1 mm
It is recommended that the space between
the screw head and the adapter should be
0.5 to 1 mm.
• Tighten the two mounting screws on the Adapter. Tighten them
alternately, a little at a time, so as to keep them at an equal
tightness. If the panel screws are tightened unequally, water may
ingress inside the panel.

Safety Precautions

X /a X /a
1 1
X Auxiliary relay
X
2
(e.g., MY Relay)
Sensor
Input
H7CX Series
59