Omron E5ZN-DRT Precautions for Correct Use, Service Life, Measurement Accuracy, Waterproofing

14.In order that power can be turned OFF in an emergency by the person operating the Temperature Controller, install the appropriate switches and circuit breakers, and label them accordingly.

15.Turn OFF the power before drawing out the Temperature Controller body. Do not touch or apply excessive force to the terminals or electronic parts. When inserting the body, make sure that electronic parts do not come in contact with the case.

16.When the terminal block for the E5GN is detached, do not touch or apply excessive force to any electronic parts.

17.Use alcohol to clean the Temperature Controller. Do not use thinner or other solvent-based substances.

18.Inverters with an output frequency of 50/60 Hz are available, but they may cause the internal temperature of Temperature Controller to rise, possibly resulting in smoke or burning. Do not use an inverter output to supply power to a Temperature Controller.

Precautions for Correct Use

●Service Life

1.Use the Temperature Controller within the specified temperature and humidity ranges. If the product is installed inside a control panel, the temperature around the Temperature Controller and not the temperature around the control panel must be kept within the specified temperature range.

2.The service life of electronic devices such as Temperature Controllers is determined not only by the number of switching operations performed by the relay, but also by the service life of the internal electronic components. The service life of these components depends on the ambient temperature: it will be shorter if the ambient temperature is high and longer if the ambient temperature is low. For this reason, the service life of the product can be extended by keeping the internal temperature of the Temperature Controller low.

3.If several Temperature Controllers are mounted side-by-side or are arranged vertically, the heat generated by them may cause the internal temperature of the products to rise, thus reducing their service life. To prevent this, take steps to ensure that the Temperature Controllers are cooled, such as installing fans. When providing forced cooling, however, be careful not to cool down the terminal sections alone to avoid measurement errors.

●Measurement Accuracy

1.When extending the lead wires for thermocouples, use a com- pensating conductor appropriate for the type of thermocouple use.

2.When extending the lead wires for platinum resistance ther- mometers, use lead wires with low resistance, and make the resistance in the 3 lead wires equal.

3.The type of Temperature Sensor and the input type for the Temperature Controller must be set the same.

4.There are two types of platinum resistance thermometers: Pt and JPt. Accurate measurement will not be possible if the input type for the Temperature Sensor is not set correctly.

5.Mount the Temperature Controller horizontally.

6.If significant errors occur, check to see if the input shift has been set correctly.

●Waterproofing

Sections without any specification on their degree of protection or those with IP@0 specifications are not waterproof.

●EN/IEC Compliance

Installing the following fuse in the power supply terminal block is rec- ommended if the Temperature Controller is used in applications requiring EN/IEC compliance.

Recommended fuse: A T2A, 250-VAC, time lag fuse with low break- ing capacity

●Operating Precautions

1.It takes approximately five seconds for the outputs to turn ON from the moment the power is turned ON. Due consideration must be given to this time when incorporating Temperature Con- trollers in a sequence circuit.

2.When using the self-tuning capability of the E5@N, E5@K, or E5@J, supply power to the load (e.g., heater) at the same time as or before supplying power to the Temperature Con- troller. If power is turned ON for the Temperature Controller before turning ON power for the load, self-tuning will not be performed properly and optimum control will not be achieved. When starting operation after the Temperature Controller has warmed up, turn OFF the power and then turn it ON again at the same time as turning ON power for the load. (Instead of turning the Temperature Controller OFF and ON again, switching from STOP mode to RUN mode can also be used in this case.)

3.The reception of the Temperature Controller may be affected if it is used close to radios, television sets or wireless devices.

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