E2CA Datasheet, PDF (6/12 Pages) Omron Electronics LLC – Linear Output Proximity Sensor with High-accuracy Resolution

E2CA
Nomenclature
Selector and Adjuster Settings
(1) Operation Mode Selector
OUTPUT _{The switching output transistor turns ON}
NO
NC _{when there is sensing object detection.}
OUTPUT _{The switching output transistor turns ON}
NO
NC _{when there is no sensing object detection.}
(1) Operation mode selector
(2) Cord length compensation selector
SENSITIVITY adjuster
Used to adjust the sensing distance of
switching output.
E2CA
POWER indicator (red LED)
ON when power is supplied to the E2CA.
OPER indicator
ON when the switching output of the POWER
indicator is detected.
(ON when detected, OFF when not detected)
SPAN indicator
Indicates the linear range of green
LED output current.
Linear output current adjuster (20 mA)
Linear output current adjuster (4 mA)
(2) Cord Length Compensation Selector
Set the selector to 3 m or 5 m according to the
length of the Sensor cord in use.
CABLE
3m
5m
CABLE
3m
5m
A cord length of 3 m is selected.
A cord length of 5 m is selected.
Linear Output Adjustment (LINEARITY Adjuster)
Step
1
Positioning ---
2
20% of rated
sensing distance
Standard object
3
Rated sensing distance
Remarks
---
Standard
object
LINEARITY ---
---
adjuster
Adjustment
procedure
4 mA
Connect an ammeter across terminals 1
Place the standard
and 2.
object at 20% of the
rated sensing distance
away from the Sensor
Shielded cord
P2CF-11
Switching
output
(photocoupler
Unit. Turn the 4 mA
LINEARITY adjuster
output)
slowly clockwise (the
output current is
E2CA-Aj4j
increased) or
Amplifier Unit
P2CF-11
Front-connecting Socket
counterclockwise (the
output current is
decreased) to set the
Note: This illustration shows the Sensor
output current to 4 mA.
Unit connected to the Amplifier Unit
(SPAN indicator is ON.)
with the P2CF-11 Front-connecting
Socket mounted.
20 mA
Fasten the standard
object at the rated
sensing distance. Turn
the 20-mA LINEARITY
adjuster slowly
clockwise (the output
current is increased) or
counterclockwise (the
output current is
decreased) to set the
output current to 20 mA.
(SPAN indicator is ON.)
To further
improve the
adjustment
accuracy, set
again the
position of the
standard object
in the order of
steps 2 and 3.
Perform minute
adjustment of
the output
current.
6