9

E3S-A

Structure of Sensor I/O Connector

Adjustment Methods

Sensitivity Adjustment for Diffuse-reflective Sensors Set to Light ON

Unlike conventional Photoelectric Sensors, the variation in the sensitivity of E3S-A Photoelectric Sensors is minimal. This means

the sensitivity can be adjusted on only a single Photoelectric Sensor, and then the adjusters on the other Photoelectric Sensors

can be set to the same scale position. There is no need to adjust the sensitivity of each Photoelectric Sensor individually.

E3S-AR41

E3S-AR91

Light-ON

L Side

(LIGHT ON)

Retro-reflective Sensors

Dark-ON

D Side

(DARK ON)

Item

Sensing condition

Sensitivity adjuster

Indicators

Procedure

1) Position A

Locate a sensing object at the sensing

distance, set the sensitivity adjuster to

the minimum scale position, and

gradually increase sensitivity by turning

the sensitivity adjuster clockwise until the

incident light indicator (red LED) is ON.

Position A is where the indicator has

turned ON.

2) Position B

Position B is when the sensing object is

removed and the sensitivity adjuster is

turned clockwise until the incident light

indicator (red LED) is ON. Position C is

where the adjuster is turned

counterclockwise (reducing the

sensitivity) from position B until the

incident light indicator (red LED) is OFF.

When there are no background objects,

the maximum sensitivity is position C.

3) Setting

---

Set the sensitivity adjuster to halfway

between (A) and (C) (at the optimum

sensitivity). Check that the stability

indicator (green LED) turns ON

according to whether the sensing object

is there or not. There is not sufficient

margin if it does not turn ON. If this is the

case, reconsider the detection method.

Model

Operation

mode

Timing charts

Mode

selector

switch

Output circuit

T

T: OFF-delay timer (0 to 100 ms)

Incident light

No incident light

ON

OFF

ON

OFF

Operate

Reset

Light indicator

(red)

(Between blue and black)

Output

transistor

Load

(e.g., relay)

4.4 K

(External

diagnostic input)

(Self-diagnostic

output)

ZD

Light

indica-

tor

Stability

indicator

(green)

Photo-

electric

Sensor

main

circuit

Load

(relay)

Brown

Blue

Black

(Control

output)

100 mA max.

10 to

30 VDC

(red)

Load

(relay)

Orange

50 mA

max.

Pink

ZD

T

T: OFF-delay timer (0 to 100 ms)

Incident light

No incident light

ON

OFF

ON

OFF

Operate

Reset

Light indicator

(red)

(Between brown and black)

Output

transistor

Load

(e.g., relay)

2

4

1

3

1

2

3

4

Terminal No.

XS2F-D421-DC0-F

Brown

Blue

Black

Note: Pin 2 is not used.

Classification

Wire color

Connection Pin No.

Application

For DC

Brown

1

+V

---

2

---

Blue

3

0 V

Black

4

Output

Photoelectric

Sensor

Sensing object

Backg-

round

object

Min.

Max.

(A)

Stability

indicator

(green)

Light

indicator

(red)

ON

→ OFF

OFF

→ ON

Photoelectric

Sensor

Sensing object

Backg-

round

object

Min.

Max.

(B)

(C)

ON

→ OFF

ON

→ OFF

Stability

indicator

(green)

Light

indicator

(red)

Min.

Max.

(C)

(A)

ON

ON

→ OFF

Stability

indicator

(green)

Light

indicator

(red)