18
Modular Temperature Controller for Gradient Temperature Control
EJ1G
Safety Precautions
!
CAUTION
■
Precautions for Safe Use
Observe the following points to ensure safe operation.
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 temperature and
humidity ranges. Provide forced-cooling if required.
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. To connect bare wires to the terminal block, use copper
braided or solid wires with a gage of AWG22 to AWG14 (equal to
cross-sectional area of 0.326 to 2.081 mm
2
) for power supply
lines and a gage of AWG28 to AWG16 (equal to cross-sectional
area of 0.081 to 1.309 mm
2
). (The stripping 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.
Allow as much space as possible between the product and
devices that generate a powerful high-frequency or surge.
Separate the high-voltage or large-current power lines from other
lines, and avoid parallel or common wiring with the power lines
when you are wiring to the terminals.
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.
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.
15.
Use a switch, relay, or other device with contacts to turn OFF the
power supply quickly. Gradually lowering the voltage of the power
supply may result in incorrect outputs or memory errors.
16.
Do not touch the electronic components with your hands or
subject them to shock when removing the terminal block.
17.
Connect only the specified number of products in only a specified
configuration.
18.
Mount the product to a DIN Rail mounted vertically to the ground.
19.
Always turn OFF the power supply before wiring the product,
replacing the product, or changing the product configuration.
20.
Attach the enclosed cover seal to the connector opening on the
left end product during installation.
21.
Do not use port B on the end product when using port C on
HFUs.
22.
Install the product only after reading the manual provided with the
End Unit.
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 EJ1G external
power supply or the power supply connected to the EJ1G.
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 shavings 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.
