E2KC25MY1 Datasheet, PDF (11/18 Pages) Omron Electronics LLC – Adjustable Long-distance Sensor

Proximity Sensors Technical Guide
Precautions for Correct Use
The following conditions must be considered to understand the conditions of the application and location as well as the relation to control
equipment.
●Model Selection
Item
Check the relation between the sensing object
and the Proximity Sensor.
Points of consideration
Specific condi- Direction of ob-
tions of object ject movement
Peripheral metal Sensing distance
Sensing
object and
operating
condition of
Proximity
Sensor
Sensing object
Sensing
distance
Surrounding
metals
Proximity Sensor
Material, size, Transit interval, Material, distance Fluctuation in tran-
shape, existence speed, existence to Sensor, orien- sit point, allowable
of plating, etc. of vibration, etc. tation, etc.
error, etc.
Sensing (set) distance, shape of Sensor (rectangular, cylindrical, through-
beam, grooved), influence of peripheral metal (Shielded Sensors, Non-
shielded Sensors), response speed (response frequency), influence of
temperature, influence of voltage, etc.
Electrical
conditions
Environ-
mental
conditions
Verify the electrical conditions of the control system
to be used and the electrical performance of the Power
Proximity Sensor.
supply
DC (voltage fluctuation, current ca-
pacity value)
AC (voltage fluctuation, frequency, etc.)
Need for S3D2 Controller
Selecting the power
supply type
{ DC
DC + S3D2 Controller
AC
Output _Load
Load
Resistive load - Non-contact control system
Inductive load - Relay, solenoid, etc.
• Steady-state current, inrush current
• Operating, reset voltage (current)
Lamp load
• Steady-state current, inrush current
Open/close frequency
Selecting the power
supply type
{ DC
DC + S3D2 Controller
AC
Control output
Maximum current
(voltage)
Leakage current
Residual load voltage
The environmental tolerance of the Proximity Sensor
• Water Resistance
is better than that of other types of Sensors. However, Do not use the Sensor in water, rain, or outdoors.
investigate carefully before using a Proximity Sensor
under harsh temperatures or in special atmospheres.
• Ambient Conditions
To maintain reliability of operation, do not use the
Temperature Highest or lowest Temperature influence, Sensor outside the specified temperature range or
and humidity values, existence high-temperature use, outdoors. Even though the Proximity Sensor has a
of direct sunlight, low temperature use, water-resistant structure, it must be covered to pre-
etc.
need for shade, etc. vent direct contact with water or water-soluble cutting
Atmosphere
oil. Do not use the Sensor in atmospheres with chem-
Water, oil, iron Need for water resis- _{ical vapors, in particular, strong alkalis or acids (nitric}
powder, or other tance or oil resistance, _{acid, chromic acid, or hot concentrated sulfuric acid).}
special chemicals need for explosion-
proof structure
• Explosive Atmospheres
Vibration and Size, duration
shock
Need for strength,
mounting method
Do not use the Sensor in atmospheres where
there is a danger of explosion. Use an Explosion-
proof Sensor.
When deciding the mounting method, take into consideration not
only restrictions due to mechanical devices, but also ease of main-
tenance and inspection, and interference between Sensors.
Mounting
conditions
Wiring method,
existence of in-
ductance surges
Connection
Wires
Wire type, length, oil-resistant
cable, shielded cable, robot
cable, etc.
Conduits, ducts, pre-wired,
terminal wiring, ease of main-
tenance and inspection
Mounting procedure
Installation location
Existence of mounting
brackets, direct mounting,
secured with bolts or screws
Ease of maintenance and
inspection, mounting space
Influence of
external
electromag-
netic fields
• The influence within a DC magnetic field is 20 mT* max. Do not use the Sensor at a level higher than 20 mT.
• Sudden changes in the DC magnetic field may cause malfunction. Do not use the Sensor for applications that involve turning a
DC electromagnet ON and OFF.
• Do not place a transceiver near the Sensor or its wiring. Doing so may cause malfunction.
Other con-
siderations
Cost feasibility: Price/delivery time
Life: Power-ON time/frequency of use
* mT (millitesla) is a unit for expressing magnetic flux density. One tesla is the equivalent of 10,000 gauss.
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