Precautions For Safe Use - Omron E5AR-T User Manual

VI

Precautions for Safe Use

(1) Use and store the Digital Controller in the range of specifications for ambient
temperature and humidity. The service life will decrease due to increased
internal temperature if multiple Digital Controllers are mounted closely side by
side or one on top of the other. If this type of mounting is used, use forced
cooling, e.g., use a fan to blow air onto the Digital Controllers.
(2) Do not prevent heat dissipation by obstructing the periphery of the Digital
Controller. Do not block the vents on the Digital Controller unit.
(3) The supplied power voltage and load must be within the rated and specified
ranges.
(4) Be sure to confirm the name and polarity for each terminal before wiring the
terminal block.
(5) Do not connect anything to unused terminals.
(6) Use the specified size of crimp terminals (M3, width: 5.8 mm max.) to wire the
terminal block. When connecting bare wires, use copper stranded or solid
wires, and use AWG22 (cross-sectional area of 0.326 mm
sectional area of 2.081 mm
(cross-sectional area of 0.081 mm
2
mm ) for other terminals. (Length of exposed wire: 6 to 8 mm)
(7) Ensure that the rated voltage is attained within 2 seconds after turning ON the
power.
(8) Turn OFF the power first when you need to draw out the Digital Controller. Do
Not touch the terminals or the electronic components, or subject them to
physical shock. When inser ting the Digital Controller, do not allow the
electronic components to contact the case.
(9) Do not remove the inner circuit board.
(10) The output may turn OFF when shifting to certain levels. Take this into consid-
eration when performing control.
(11) Allow a warm-up time of at least 30 minutes.
(12) To prevent inductive noise, separate the Digital Controller terminal block wiring
from power lines that carry high voltages or high currents. Also, do not wire
power lines together with or parallel to the Digital Controller wiring. Using
shielded cables and separate conduits or ducts is recommended.
Attach a surge suppressor or noise filter to peripheral devices that generate
noise (in particular, motors, transformers, solenoids, magnetic coils, or other
equipment that has an inductive component). When a noise filter is used at the
power supply, first check the voltage or current, and attach the noise filter as
close as possible to the product. Allow as much space as possible between the
product and devices that generate powerful high frequencies (e.g., high-
frequency welders, high-frequency sewing machines) or surge.
(13) Install a switch or circuit breaker that allows the operator to immediately turn
OFF the power, and label suitably.
(14) The product is designed for indoor use only.
Do not use the product outdoors or in any of the following locations.
· Locations where dust or corrosive gas is present (in particular, sulfur or
ammonia gases)
· Locations where condensation or ice may form
· Locations directly exposed to sunlight
· Locations subject to strong shocks or vibration
· Locations where water or oil may splatter on the Digital Controller
· Locations directly exposed to radiant heat from heating equipment
· Locations subject to sudden or extreme changes of temperature
(15) Do not use paint thinner or similar chemical to clean with. Use standard grade
alcohol.
2
) for the power supply terminals and AWG28
2
) to AWG16 (cross-sectional area of 1.309
2
) to AWG14 (cross-