Omron EE-SX47 Datasheet page 23

EE-SX91
Safety Precautions
This product is not designed or rated for ensuring
safety of persons either directly or indirectly. Do not
use it for such purposes.
Precautions for Safe Use
• 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.
Precautions for Correct Use
●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.
Screw diameter
M2.0
M3
• 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.
24
WARNING
Brown
Load
Load
Black
Sensor
White
Blue
Brown
Load
Load
Black
Sensor
White
Blue
(Loa ( d short-circuit)
Brown
Load
Load
Black ck
Sensor
White
Blue
Tightening torque
0.15 N·m max. (1.5 kgf·cm)
0.54 N·m max. (5.5 kgf·cm)
●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.
EE-SX91 series
SW
Tr
main
circuit
Example: EE-SX91 Series
−
Load Resistance of 4.7 k Ω Connected in a Counter
+ +
Counter Specifications
Input impedance
Voltage judged as high level (input ON)
Voltage judged as low level (input OFF)
+
The high and low levels are found using the following formulas. The
−
input device specifications must satisfy both formulas.
High level:
Input voltage V =
H
Low level:
Load current Ic =
≤ 1.0 V (Residual voltage for 100-mA load
Input voltage V
L
current)
Note: Refer to the ratings of the Sensor for the residual voltage of the load
current.
●Other Precautions
• Do not disconnect the Connector from the Sensor when power is
supplied to the Sensor, or Sensor damage could result.
• Do not install the Sensor in the following places to prevent
malfunction or trouble:
1. Places exposed to dust or oil mist
2. Places exposed to corrosive gas
3. Places directly or indirectly exposed to water, oil, or chemicals
4. Outdoor or places exposed to intensive light, such as direct
sunlight
• Be sure to use the Sensor under the rated ambient temperature.
• The Sensor may be dissolved by exposure to organic solvents,
acids, alkali, or aromatic hydrocarbons, aliphatic chloride
hydrocarbons causing deterioration in characteristics. Do not
expose the Sensor to such chemicals.
Insert a resistor
Counter (Voltage input type)
+Vcc
24 V
Power supply
R
Input terminal (CP)
Output
Z
(Input impedance:
approx. 5.6 kΩ)
0 V
0 V
5.6 K Ω
4.5 to 30 VDC
0 to 2 VDC
Z 5.6 k
× 24 V = 13 V
Vcc =
R+Z 4.7 k+5.6 k
Vcc 24 V
= 5.1 mA ≤ 100 mA
=
R R