Omron E5CN-FR, Manual

Page: 15 / 20

Limit Controller
E5CN-FR
15
Precautions for Correct Use
Service Life
1. Use the Limit Controller within the following temperature and
humidity ranges:
Temperature:
−
10 to 55
°
C (with no icing or condensation)
Humidity: 25% to 85%
If the Controller is installed inside a control board, the ambient
temperature must be kept to under 55
°
C, including the
temperature around the Controller.
2. The service life of electronic devices like Limit 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
Limit Controller.
3. When two or more Limit 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 Limit
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 Limit Controllers. When providing forced cooling,
however, be careful not to cool down the terminals sections alone
to avoid measurement errors.
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 Limit Controller so that it is horizontally level.
4. If the measurement accuracy is low, check to see if input shift has
been set correctly.
Waterproofing
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: NEMA4X for indoor use (equivalent to IP66)
Rear case: IP20, Terminal section: IP00
Operating Precautions
1. It takes approximately two seconds for the outputs to turn ON
from after the power supply is turned ON. Due consideration must
be given to this time when incorporating Limit Controllers in a
sequence circuit.
2. Avoid using the Controller in places near a radio, television set, or
wireless installing. These devices can cause radio disturbances
which adversely affect the performance of the Controller.
Mounting
Mounting to a Panel
1. To mount the Controller so that it is waterproof, insert the
waterproof packing onto the Controller. Group mounting does not
allow waterproofing. The waterproof packing is not required if
waterproof is not necessary.
2. Insert the E5CN-FR into the mounting hole in the panel.
3. Push the adapter along the Controller body from the terminals up
to the panel, and fasten it temporarily.
4. Tighten the two fixing screws on the adapter. Alternately tighten
the two screws a little at time to keep them balanced. Tighten
them to a torque of 0.29 to 0.39 N·m.
Attaching the Terminal Cover
Make sure that the “UP” letters on the E5CN-FR are at the top and
insert the terminal cover into the holes at the top and bottom of the
Controller.
Removing the Controller from the Case
When carrying out maintenance on the Controller, the Controller can
be removed from the case leaving the terminal leads attached. The
Controller can be removed from the case only with the E5CN-FR.
1. Insert the tool into the slots (one on the top and one on the
bottom) and release the hooks.
2. Insert the tool into the gap between the front panel and rear case
and pull out the front panel slightly. Hold both sides of the front
panel and draw out the Controller towards you. Do not apply
unnecessary force.
3. Before inserting the Controller, confirm that the sealing rubber is
in place. Insert the Controller into the rear case until you hear a
click. Press on the hooks on the top and bottom of the rear case
to be sure that the hooks are securely locked in place.Be sure
that electronic parts do not come in contact with the case.
Wiring Precautions
• Separate input leads and power lines to protect the Controller and
its lines from external noise.
• Use wires of a thickness of AWG24 (0.205 mm
2
) to AWG14
(2.081 mm
2
).
The exposed current-carrying part to be inserted into terminals
must be 5 to 6 mm.
• We recommend using crimp terminals when wiring the terminals.
• Tighten terminal screws to a torque of 0.74 to 0.90 N·m.
• Use the following type of crimp terminals for M3.5 screws.
Terminal Cover
(order separately)
Mounting Adapter
(Accessory)
E5CN-FR
Waterproof packing
Panel
20 min.
0.4 2.0
E5CN
PV
SV
ALM1
ALM2
ALM
3
HA
OUT1
STO
P
OUT
2 CM
W M
ANU
(1)
(1)
(2)
(3)
Tool insertion hole
Flat-blade screwdriver
(Unit: mm)
7.2 mm min.
7.2 mm min.