K3HB Datasheet, PDF (30/32 Pages) Omron Electronics LLC – Digital Indicators

Common Precautions
■ Precautions
!WARNING
Do not touch the terminals while power is being supplied.
Doing so may possibly result in electric shock. Make sure
that the terminal cover is installed before using the
product.
Always provide protective circuits in the network. Without
protective circuits, malfunctions may possibly result in
accidents that cause serious injury or significant property
damage. Provide double or triple safety measures in
external control circuits, such as emergency stop circuits,
interlock circuits, or limit circuits, to ensure safety in the
system if an abnormality occurs due to malfunction of the
product or another external factor affecting the product's
operation.
!CAUTION
Do not allow pieces of metal, wire clippings, or fine
metallic shavings or filings from installation to enter the
product. Doing so may occasionally result in minor
electric shock, fire, or malfunction.
Do not use the product in locations where flammable or
explosive gases are present. Doing so may occasionally
result in minor or moderate explosion, causing minor or
moderate injury, or property damage.
Do not attempt to disassemble, repair, or modify the
product. Doing so may occasionally result in minor or
moderate injury due to electric shock.
Do not use the equipment for measurements within
Measurement Categories II, III or IV (according to
IEC61010-1). Doing so may occasionally cause
unexpected operation, resulting in minor or moderate
injury, or damage to the equipment. Use the equipment
for measurements only within the Measurement Category
for which the product is designed.
Perform correct setting of the product according to the
application. Failure to do so may occasionally cause
unexpected operation, resulting in minor or moderate
injury, or damage to the equipment.
Ensure safety in the event of product failure by taking
safety measures, such as installing a separate monitoring
system. Product failure may occasionally prevent
operation of comparative outputs, resulting in damage to
the connected facilities and equipment.
Tighten the screws on the terminal block and the
connector locking screws securely using a tightening
torque within the following ranges. Loose screws may
occasionally cause fire, resulting in minor or moderate
injury, or damage to the equipment.
Terminal block screws: 0.43 to 0.58 N·m
Connector locking screws: 0.18 to 0.22 N·m
Make sure that the product will not be adversely affected
if the DeviceNet cycle time is lengthened as a result of
changing the program with online editing. Extending the
cycle time may cause unexpected operation, occasionally
resulting in minor or moderate injury, or damage to the
equipment.
Before transferring programs to other nodes or changing
I/O memory of other nodes, check the nodes to confirm
safety. Changing the program or I/O memory of other
nodes may occasionally cause unexpected operation,
resulting in minor or moderate injury, or damage to the
equipment.
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Digital Indicators K3HB-R/-P/-C
Precautions for Safe Use
1. Do not use the product in the following locations.
• Locations subject to direct radiant heat from heating equipment
• Locations where the product may come into contact with water
or oil
• Locations subject to direct sunlight
• Locations where dust or corrosive gases (in particular, sulfuric
or ammonia gas) are present
• Locations subject to extreme temperature changes
• Locations where icing or condensation may occur
• Locations subject to excessive shocks or vibration
2. Do not use the product in locations subject to temperatures or
humidity levels outside the specified ranges or in locations prone
to condensation. If the product is installed in a panel, ensure that
the temperature around the product (not the temperature around
the panel) does not go outside the specified range.
3. Provide sufficient space around the product for heat dissipation.
4. Use and store the product within the specified temperature and
humidity ranges. If several products are mounted side-by-side or
arranged in a vertical line, the heat dissipation will cause the
internal temperature of the products to rise, shortening the
service life. If necessary, cool the products using a fan or other
cooling method.
5. The service life of the output relays depends on the switching
capacity and switching conditions. Consider the actual application
conditions and use the product within the rated load and electrical
service life. Using the product beyond its service life may result in
contact welding or burning.
6. Install the product horizontally.
7. Mount to a panel between 1 and 8-mm thick.
8. Use the specified size of crimp terminals (M3, width: 5.8 mm
max.) for wiring. To connect bare wires, AWG22 (cross section:
0.326 mm²) to AWG14 (cross section: 2.081 mm²) to wire the
power supply terminals and AWG28 (cross section: 0.081 mm²)
to AWG16 (cross section: 1.309 mm²) for other terminals. (Length
of exposed wire: 6 to 8 mm)
9. In order to prevent inductive noise, wire the lines connected to the
product separately from power lines carrying high voltages or
currents. Do not wire in parallel with or in the same cable as
power lines. Other measures for reducing noise include running
lines along separate ducts and using shield lines.
10.Ensure that the rated voltage is achieved no longer than 2 s after
turning the power ON.
11.Allow the product to operate without load for at least 15 minutes
after the power is turned ON.
12.Do not install the product near devices generating strong high-
frequency waves or surges. When using a noise filter, check the
voltage and current and install it as close to the product as
possible.
13.Do not use thinner to clean the product. Use commercially
available alcohol.
14.Be sure to confirm the name and polarity for each terminal before
wiring the terminal block and connectors.
15.Use the product within the noted supply voltage and rated load.
16.Do not connect anything to unused terminals.
17.Output turns OFF when the mode is changed or settings are
initialized. Take this into consideration when setting up the control
system.
18.Install an external switch or circuit breaker that complies with
applicable IEC60947-1 and IEC60947-3 requirements and label
them clearly so that the operator can quickly turn OFF the power.
19.Use the specified cables for the communications lines and stay
within the specified DeviceNet communications distances. Refer
to the User's Manual (Cat. No. N129) for details on
communications distance specifications and cables.