Precautions During Operation - Omron E5CD-800 Manual

Precautions for Correct Use
Service Life
1. Use the Digital Temperature Controller within the following
temperature and humidity ranges:
Temperature: −10 to 55°C (with no icing or condensation),
Humidity: 25% to 85%
If the Digital Temperature Controller is installed inside a control
board, the ambient temperature must be kept to under 55°C,
including the temperature around the Digital Temperature
Controller.
2. The service life of electronic devices like Digital Temperature
Controllers is determined not only by the number of times the relay
is switched but also by the service life of internal electronic
components. Component service life is affected by the ambient
temperature: the higher the temperature, the shorter the service
life and, the lower the temperature, the longer the service life.
Therefore, the service life can be extended by lowering the
temperature of the Digital Temperature Controller.
3. When two or more Digital Temperature Controllers are mounted
horizontally close to each other or vertically next to one another,
the internal temperature will increase due to heat radiated by the
Digital Temperature Controllers and the service life will decrease.
In such a case, use forced cooling by fans or other means of air
ventilation to cool down the Digital Temperature Controllers. When
providing forced cooling, however, be careful not to cool down the
terminals sections alone to avoid measurement errors.
Ensuring Measurement Accuracy
1. When extending or connecting the thermocouple lead wire, be
sure to use compensating wires that match the thermocouple
types.
2. When extending or connecting the lead wire of the platinum
resistance thermometer, be sure to use wires that have low
resistance and keep the resistance of the three lead wires the
same.
3. Mount the Digital Temperature Controller so that it is horizontally
level.
4. If the measurement accuracy is low, check to see if input shift has
been set correctly.
Resistance to Water
The degree of protection is as shown below. Sections without any
specification on their degree of protection or those with IP0 are not
waterproof.
Front panel: IP66
Rear case: IP20, Terminal section: IP00
When waterproofing is required, insert the Waterproof Packing on the
backside of the front panel.
Keep the Port Cover on the front-panel Setup Tool port of the E5ED-
800 securely closed. The degree of protection when the Waterproof
Packing is used is IP66. To maintain an IP66 degree of protection, the
Waterproof Packing and the Port Cover for the front-panel Setup Tool
port must be periodically replaced because they may deteriorate,
shrink, or harden depending on the operating environment.
The replacement period will vary with the operating environment.
Check the required period in the actual application. Use 3 years or
sooner as a guideline. If the Waterproof Packing and Port Cover are
not periodically replaced, waterproof performance may not be
maintained.
If a waterproof structure is not required, then the Waterproof Packing
does not need to be installed.
E5CD-800/E5ED-800

Precautions during Operation

1. It takes approximately two seconds for the outputs to turn ON from
after the power supply is turned ON. Design the system (e.g.,
control panel) to allow for this delay.
2. Make sure that the Digital Temperature Controller has 30 minutes
or more to warm up after turning ON the power before starting
actual control operations to ensure the correct temperature
display.
3. Avoid using the Digital Temperature Controller in places near a
radio, television set, or wireless installing. The Digital Temperature
Controller may cause radio disturbance for these devices.
Mounting
E5CD-800
E53-COV17
Terminal Cover
(Sold separately.)
Adapter
Waterproof packing
Panel
Mounting to the Panel
1. For waterproof mounting, waterproof packing must be installed on
the Digital Temperature Controller. Waterproofing is not possible
when group mounting several Digital Temperature Controllers.
2. Insert the E5CD-800 into the mounting hole in the panel.
3. Push the Adapter from the terminals up to the panel, and
temporarily fasten the E5CD-800.
4. Tighten the two fastening screws on the Adapter. Alternately
tighten the two screws little by little to maintain a balance. Tighten
the screws to a torque of 0.29 to 0.39 N·m.
Mounting the Terminal Cover
There are two models of Terminal Covers that you can use with the
E5CD-800.
Slightly bend the E53-COV23 Terminal Cover to attach it to the
terminal block as shown in the following diagram. The Terminal Cover
cannot be attached in the opposite direction. Or, you can use the E53-
COV17 Terminal Cover. Make sure that the "UP" mark is facing up,
and then attach the E53-COV17 Terminal Cover to the holes on the
top and bottom of the Digital Temperature Controller.
• E53-COV17
Adapter
Terminal Cover
(E53-COV17)
(Sold separately.)
E5ED-800
Adapter
Panel
E53-COV24
Terminal Cover
(Sold Separately)
Waterproof packing
Adapter E53-COV23
Terminal Cover
(Sold Separately)
Fastening
screws
• E53-COV23
Slightly bend
the E53-COV23
Terminal Cover
in the direction
shown by the
arrows to attach
it to the terminal
block.
Enlarged Illustration of
Terminal Section
Adapter
E53-COV24
Terminal Cover
(Sold Separately)
Fastening screws
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