EE-SX91

6

Safety Precautions

Refer to Warranty and Limitations of Liability.

This product is not designed or rated for ensuring

safety of persons either directly or indirectly. Do not

use it for such purposes.

• Power Supply Voltage

Do not exceed the voltage range

indicated in the specifications.

Applying a voltage exceeding

the specifications or using an AC

power supply may result in

rupture or burning.

•Faulty Wiring

Do not reverse the power supply

polarity. Doing so may result in

rupture or burning.

• Do not short-circuit the load. (Do

not connect to the power

supply.)

Doing so may result in rupture or

burning.

• Dispose of this product as

industrial waste.

● Installation

• It is assumed that EE-SX91 Sensors will be built into a device.

These Sensors use non-modulated light and are not equipped to

deal with interference from an external light source. When they are

used in locations subject to external light interference, such as near

a window or under an incandescent light, install them to minimize

the effects of external light interference.

• Mount the Sensors securely on a flat surface.

• Use M3 or M2.0 screws to secure the Photomicrosensor. (The

stronger M3 screws are recommended. In addition, use flat

washers and spring washers to prevent the screws from loosening.)

Refer to the following table for the correct tightening torque.

• If the Sensor is to be used on a moving part, secure the cable

connection point so that it is not directly subjected to stress.

● Wiring

Unused Output Lines

Be sure to isolate output lines that are not going to be used.

Connecting to Devices with Voltage Input Specifications

A Sensor with an open-collector output can be connected to a counter

with a voltage input by connecting a resistor between the power

source and output. Select a resistor with reference to the following

example. The resistance of the resistor is generally 4.7 k

Ω and its

wattage is 1/2 W for a supply voltage of 24 V and 1/4 W for 12 V.

Example: EE-SX91 Series

Load Resistance of 4.7 k

Ω Connected in a Counter

Counter Specifications

The high and low levels are found using the following formulas. The

input device specifications must satisfy both formulas.

High level:

Low level:

≤ 1.0 V (Residual voltage for 100-mA load

current)

Note: Refer to the ratings of the Sensor for the residual voltage of the load

current.

WARNING

Precautions for Safe Use

Sensor

Brown

Blue

Load

Load

Black

White

Sensor

Brown

Blue

Black

White

−

+

Load

Load

+

Sensor

Brown

Blue

+

−

Black

White

Load

d short-circuit)

(Loa

Load

ck

(

Precautions for Correct Use

Screw diameter

Tightening torque

M2.0

0.15 N·m max.

M3

0.54 N·m max.

Input impedance

5.6 K

Ω

Voltage judged as high level (input ON)

4.5 to 30 VDC

Voltage judged as low level (input OFF)

0 to 2 VDC

SW

main

circuit

Tr

+Vcc

EE-SX91 series

Counter (Voltage input type)

Insert a resistor

Output

0 V

0 V

R

24 V

Power supply

Z

Input terminal (CP)

(Input impedance:

approx. 5.6 k

Ω)

R+Z

Z

Vcc =

4.7 k+5.6 k

5.6 k

× 24 V = 13 V

Load current Ic =

R

Vcc

=

= 5.1 mA

≤ 100 mA

R

24 V