Operating Environment; Operating Precautions - Omron E5GN Instructions Manual

E5GN
Precautions

OPERATING ENVIRONMENT

•
Use the Temperature Controller within the rated operating
temperature, storage temperature, and operating humidity
specified for each model.
•
Use the Temperature Controller according to the perfor-
mance specifications such as vibration, shock, and degree of
protection specified for each model.
•
Do not use the Temperature Controller in places where it is
subject to dust or corrosive gases.
•
Install the Temperature Controller away from the devices that
generate high-frequency noise.


SERVICE LIFE
The service life of relays used for the control output or alarm
output varies depending on mostly switching conditions. Be sure
to confirm their performance under actual operating conditions
and do not use them beyond the allowable number of switchings.
If they are used in a deteriorated condition, insulation between
circuits may be damaged and, as a result, the Temperature
Controller itself may be damaged or burned.
The service life of electronic devices such as Temperature
Controllers is determined not only by the number of switchings of
relays, but also by the service life of internal electronic
components. The component service life is affected by the
ambient temperature: the higher the temperature becomes, the
shorter the service life becomes; the lower the temperature
becomes, the longer the service life becomes. For this reason,
the service life can be extended by lowering the internal
temperature of the Temperature Controller.
When two or more Temperature Controllers are mounted
horizontally close to each other or vertically next to each other,
the internal temperature will increase, due to heat radiated by the
Temperature Controllers, and the service life will decrease. In
these situations, forced cooling by fans or other means of air
ventilation will be required to cool down the Temperature
Controllers. When providing forced cooling, however, be careful
not to cool down the terminals solely, to avoid measurement
errors.


ORDERING PRECAUTIONS
Units separately sold, such as Control Output Units and Current
Transformers, are specified for each Temperature Controller. Be
sure to order appropriate units according to the application
requirements.


INSTALLATION
Mounting
Mount the Temperature Controller so that it is horizontally level.
Connection
When extending or connecting the thermocouple lead wire, be
sure to use compensating wires that match the thermocouple
types.
When extending or connecting the lead wire of the platinum
resistance thermometer, be sure to use wires that have low
resistance.
When wiring the platinum resistance thermometer to the
Temperature Controller, keep the wire route as short as possible.
Separate this wiring away from the power supply wiring and load
wiring to avoid inductive or other forms of noise.
Do not use empty terminals.
Crimp Terminal Connection
Use crimp terminals that match M3.5 screws. M3.5 x 8 self-rising
screws are used.
E5GN
7.2 mm max.
Be careful not to tighten the terminals screws excessively.
Soldering Connection
The self-rising screws provide easy soldering connection. Strip
the lead wire by a length of 6 to 8 mm.

OPERATING PRECAUTIONS

For Temperature Controllers with alarm outputs, alarm output
may not be generated correctly when an abnormality occurs in
the device. A separate alarm device should be incorporated into
the system.
To ensure proper performance, parameters of the Temperature
Controllers are set to default values before they are shipped.
Change these parameters depending on actual applications. If
left unchanged, the Temperature Controller will operate under the
default settings.
It takes several seconds for the relay to turn ON from the
moment the power is turned ON. Consider this time when
incorporating Temperature Controllers in a sequence circuit.
When pulling out the Temperature Controller body, do not apply
excessive force. After the body is removed, be careful not to
apply any shock to the connectors or other electronic
components on the PCB.
Models without any specification on their degree of protection or

those with IP 0 do not offer a waterproofing feature.
E5GN