Omron E5CD-B-800 Series Instruction Manual page 45

25.Observe the following precautions when you wire the E5D-B.
• Always follow the E5 
D Digital Temperature Controllers User's
Manual (Cat. No. H224).
• Do not wire anything to the release holes.
• Do not tilt or twist a flat-blade screwdriver while it is inserted into
a release hole on the terminal block. The terminal block may be
damaged.
• Insert a flat-blade screwdriver into the release holes at an angle.
The terminal block may be damaged if you insert the screwdriver
straight in.
• Do not allow the flat-blade screwdriver to fall out while it is
inserted into a release hole.
• Do not bend a wire past its natural bending radius or pull on it
with excessive force. Doing so may cause the wire to break.
• Do not use crossover wiring except for the input power supply
and communications.
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.
The degree of protection when the Waterproof Packing is used is
IP66. To maintain an IP66 degree of protection, the Waterproof
Packing 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.
E5@D-800
45