Omron EJ1G, User Manual, Page: 8 / 237

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Safety Precautions
CAUTION
Do not touch the terminals while power is being supplied. Doing
so may occasionally result in minor injury due to electric shock.
Use a power supply that complies with the reinforced insulation
specified in IEC 60664 for the EJ1 external power supply or the
power supply connected to the EJ1. If non-compliant power
supplies are used, electric shock may occasionally result in minor
injury.
Do not allow pieces of metal, wire clippings, or fine metallic shav-
ings or filings from installation to enter the product. Doing so may
occasionally result in electric shock, fire, or malfunction.
Do not use the product where subject to flammable or explosive
gas. Otherwise, minor injury from explosion may occasionally
occur.
Never disassemble, modify, or repair the product or touch any of
the internal parts. Minor electric shock, fire, or malfunction may
occasionally occur.
Tighten the terminal screws to between 0.40 and
0.56 N·m. Loose screws may occasionally result in fire.
Set the parameters of the product so that they are suitable for the
system being controlled. If they are not suitable, unexpected
operation may occasionally result in property damage or
accidents.
A malfunction in the product may occasionally make control
operations impossible or prevent alarm outputs, resulting in
property damage. To maintain safety in the event of malfunction of
the product, take appropriate safety measures, such as installing
a monitoring device on a separate line.
Gradient temperature control controls the average temperature for
more than one channel. If a heater burnout occurs during gradient
temperature control and the temperature of that channel
decreases, physical damage may occasionally occur because the
temperature of the other channels will increase. When using
gradient temperature control, implement suitable safety measures
for the entire system using heater burnout alarms or temperature
information for individual channels.