Omron EJ1 User Manual page 9

Be sure to observe the following precautions to prevent operation failure, malfunction, or adverse affects on
the performance and functions of the product. Not doing so may occasionally result in unexpected events.
1) The product is designed for indoor use only. Do not use the product outdoors or in any of the following
locations.
Places directly subject to heat radiated from heating equipment
Places subject to splashing liquid or oil atmosphere
Places subject to direct sunlight
Places subject to dust or corrosive gas (in particular, sulfide gas or ammonia gas)
Places subject to intense temperature change
Places subject to icing or condensation
Places subject to vibration or strong shocks
2) Use and store the product within the rated ambient temperature and humidity ranges.
Mounting two or more Temperature Controllers side by side, or mounting Temperature Controllers above
each other may cause heat to build up inside the Temperature Controllers, which will shorten their service
life. If the Temperature Controllers are mounted above each other or side by side, use forced cooling by
fans or other means of air ventilation to cool down the Temperature Controllers.
3) To allow heat to escape, do not block the area around the product. Do not block the ventilation holes on
the product.
4) Be sure to wire properly with correct polarity of terminals.
5) Use specified size (M3, width 5.8 mm or less) crimped terminals for wiring. Use a gage of AWG22 to
AWG14 (equal to cross-sectional area of 0.326 to 2.081 mm
AWG28 to AWG16 (equal to cross-sectional area of 0.081 to 1.309 mm
length is 6 to 8 mm.) Up to two wires of same size and type, or two crimped terminals can be inserted into
a single terminal.
6) Do not wire terminals that do not have an identified use.
7) To reduce inductive noise, keep the wiring for the product's terminal block away from power cables
carrying high voltages or large currents. Also, do not wire power lines together with or parallel to product
wiring. Using shielded cables and using 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 have an inductance 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 (high-frequency welders, high-frequency sewing machines, etc.) or surge.
8) Use the product within the rated load and power supply.
9) Make sure that the rated voltage is attained within two seconds of turning ON the power using a switch or
relay contact. If the voltage is applied gradually, the power may not be reset or output malfunctions may
occur.
10) Make sure that the product has 30 minutes or more to warm up after turning ON the power before starting
actual control operations to ensure the correct temperature display.
11) The switch or circuit breaker must be within easy reach of the operator, and must be marked as a
disconnecting means for this unit.
12) Do not use paint thinner or similar chemical to clean with. Use standard grade alcohol.
13) Design the system (e.g., the control panel) allowing leeway for the delay required before product outputs
are valid after turning ON power to the product.
14) Never touch the electronic components, connectors, or patterns on product boards with your bare hands.
Always hold the product by the case. Inappropriately handling the product may occasionally damage
internal components due to static electricity.
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Precautions for Safe Use
2
) for power supply lines and a gage of
2
) for all other lines. (The stripping