xii
●
Installation
1)
Do not connect an End Unit directly to an HFU.
2)
Always connect an End Unit to the right side of the Basic Units.
3)
Always connect the HFU to the left side of the Basic Units.
4)
The EJ1 cannot be used linked to a CJ-series PLC.
5)
Use the EJ1G-
@@
for gradient temperature control. Use the EJ1N-
@@
for any other type of temperature
control.
6)
When removing the terminal block to replace the Unit, be sure to confirm that the new Unit is the same as
the Unit that is being replaced.
●
Service Life
1)
Use the product within the following temperature and humidity ranges.
Temperature:
−
10 to 55
°
C (with no icing or condensation)
Humidity: 25% to 85%
When the Temperature Controller is incorporated in a control panel, make sure that the controller’s
ambient temperature and not the panel’s ambient temperature does not exceed 55
°
C.
2)
The service life of electronic devices like the Temperature Controller is determined 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 Temperature Controller.
3)
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. However, be sure not to
cool only the terminals. Doing so will result in 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 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.
●
Precautions for Operation
1)
It takes a certain amount of time for the outputs to turn ON from after the power supply is turned ON. Due
consideration must be given to this time when designing control panels, etc.
2)
It takes 30 minutes from the time the product is turned ON until the correct temperature is indicated.
Always turn ON the power supply at least 30 minutes before starting temperature control.
3)
Avoid using the Temperature Controller near a radio, television set, or other wireless device. Its use would
result in reception disturbance.
Precautions for Correct Use
Summary of Contents for EJ1G
Page 3: ...iv ...
Page 17: ...xviii ...
Page 21: ...xxii ...
Page 53: ...32 Unit Configuration Examples Section 2 4 ...
Page 69: ...48 Changing SPs During Operation Section 3 3 ...
Page 81: ...60 Other Functions Section 4 5 ...
Page 145: ...124 Other HFU Functions Section 5 7 ...
Page 167: ...146 Detailed Description of Services Section 6 4 ...
Page 229: ...208 Parameters That Can Be Allocated for Programless Communications Appendix ...
Page 237: ......