Installation Instructions
PHOTOSWITCHr Bulletin 42CA Cylindrical Photoelectric Sensors
IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.
Refer to the product catalog pages for additional information.
Description
Specifications
The 42CA 18 mm cylindrical family of general purpose
photoelectric sensors is intended for light to medium duty
industrial applications.
Environmental
The 42CA family provides an indication if the sensor
operation is unstable. An indicator flashes if the signal level is
too close to the detection threshold. This helps for easy
alignment of the sensor and forewarns against detection of a
background.
Features
S 18 mm industry standard enclosure
S Wide selection of sensing modes
Certifications
cULus and CE Marked for all applicable directives
Operating
Environment
IP67
Operating
Temperature [C (F)]
--25…+70° (--13…+158°)
Vibration
10…55 Hz, 1 mm amplitude, meets or exceeds IEC 60947--5--2
Shock
30 g with 1 ms pulse duration, meets or exceeds IEC
60947--5--2
Relative Humidity
5…95% (at temp. 50°C (122°F)) noncondensing
Ambient Light
Immunity
Incandescent lamp 5000 lux, sunlight 108,000 lux
Optical
S Patented ASIC design offers linear sensitivity adjustment,
stability indication and excellent noise immunity
Sensing Modes
Pol
retro
Retro
Std
diffuse
BGS
Trans
beam
S Two LED indicators provide status of power, output,
unstable operation and short-circuit protection
Sensing Range
4.8 &
7.2 m
3.8 m
100, 400 &
1000 mm
50 &
100 mm
16 m
S Complementary light and dark operate outputs
Light Source
VR
660 nm
VR
660 nm
IR 880 nm
VR
660 nm
IR
880 nm
LED Indicators
Green and yellow, see User Interface
Sensitivity
Adjustment
Single-turn potentiometer on all standard diffuse, 7.2 m (23.6 ft)
retroreflective and transmitted beam models
S Input to disable light source on transmitted beam emitter
User Interface
LED Color
State
Yellow
Green
Electrical
Status
OFF
Output de-energized–
Voltage
10…30V DC
ON
Output energized–
Current Consumption
30 mA max
OFF
Power is OFF
Sensor Protection
Reverse polarity, overload, short circuit
ON
Power is ON
Outputs
Flashing
(6 Hertz)
Flashing (1.5 Hertz)
Unstable (0.5 < Margin < 2)
Output short-circuit protection active
– Black wire or pin 4 of connector.
Response Time
1 ms (100 and 400 mm diffuse, 4.8 m retro, 3.8 m pol retro, and
TB models)
0.5 m (1000 mm diffuse, 7.2 m retro and BGS models)
Output Type
PNP or NPN by cat. no.
Output Mode
Complementary light or dark operate, selectable light or dark
operate for background suppression models
Output Current
100 mA max
Output Leakage
Current
10 µA max
Mechanical
Housing Material
PBT
Lens Material
PMMA
Lens Material
PMMA
Connection Types
2 m cable, 4-pin DC micro (M12) QD
Supplied Accessories
18 mm fastening nuts
Optional Accessories
Mounting brackets, reflectors, cordsets
Approximate Dimensions [mm (in.)]
17
(0.67)
16.5
(0.65)
Dia.
66.5 (2.62)
41.7 (1.64)
1.8
(0.07)
M18 x 1
LED
Sensitivity
Adjustment
9.7
(0.38)
17
(0.67)
74.5 (2.93)
41.7 (1.64)
16.5
(0.65) M12 x 1
Dia.
LED
Sensitivity
Adjustment
1.8
(0.07)
M18 x 1
1
Wiring Diagrams
PNP Models with Complementary Outputs
Brown (1)
NPN Models with Complementary Outputs
+
LO Black (4)
Load
DO White (2)
Load
Blue (3)
DO
LO
–
Brown (1)
White (2) Load
Black (4)
+
1
Blue (3)
–
2
Load
3
M12 Male
Transmitted Beam Emitter
Brown (1)
4
+
Black (2)
–
Blue (3)
–
– For normal operation, black wire (pin 2) needs no connection. To disable light source, connect black wire (pin 2) to --V.
Additional Wiring Options for Background Suppression
Face View Male
Receptacle (Sensor)
DC Micro
NPN Output
Cable
Brown
White
Black
Blue
Quick-Disconnect
+
—
Load
--
1
2
Brown
White
4
3
Black
Blue
+
1
4
--
2
3
—
Load
— Open circuit or tie white (2) and brown (1) conductors together for L.O. Tie white (2) and blue (3) conductors together for D.O.
Face View Male
Receptacle (Sensor)
DC Micro
PNP Output
Cable
White
Black
Quick-Disconnect
+
Brown
˜
Load
--
Blue
1
2
Brown
White
4
Black
3
Blue
+
1
4
--
2
3
˜
Load
˜ Tie white (2) and brown (1) conductors together for L.O. Open circuit or tie white (2) and blue (3) conductors together for D.O.
Single Output, Dark Operate Models of Diffuse, Retroreflective and Polarized Retroreflective
Cable
Black
Quick-Disconnect
+
Brown
Load
Blue
1
Brown
™
4
Black
--
3
Blue
+
™
Load
--
™ For NPN type, tie the load to brown (+). For PNP type, tie the load to blue (--).
Typical Response Curves
Standard Diffuse [100 mm]
Background Suppression [50 mm]
White Paper
1
Gray Paper
18%
60
(2.36)
100
(3.9)
10
Black Paper
6%
1
1
(0.04)
100
(3.9)
with 92--47
reflector
1
Distance [m (ft)]
1
(0.04
10
(32.8)
100
1
0.1
(0.33)
100
(3.94)
100
with 92--124
reflector
10
10
(0.39
Polarized Retroreflective [3.8 m]
1000
Operating Margin
10
1
(3.28)
0
Distance [mm (in.)]
Retroreflective [7.2 m]
with 92--124
reflector
0.1
(0.33)
10
(0.39)
Distance [mm (in.)]
Operating Margin
Retroreflective [4.8 m]
0.01
(0.03)
Black
Paper
6%
1
0
140
(5.51)
Distance [mm (in.)]
100
White Paper
10
Operating Margin
0 20
(0.79)
10
0
White Paper
Operating Margin
Operating Margin
Operating Margin
10
0.1
Operating Margin
Background Suppression [100 mm]
10
0
10
0
with 92--47
reflector
1
(3.28)
Distance [m (ft)]
2
10
(32.8)
with 92--124
reflector
10
with 92--47
reflector
1
0.01
(0.03)
0.1
(0.33)
1
(3.28)
Distance [m (ft)]
10
(32.8)
Typical Response Curves (continued)
Retroreflective [7.2 m]
--60
--20
0
20
40
60
0
--60
Beam Diameter (mm)
--40
80
--40
--20
0
20
40
60
1
2
3
4
5
(3.3) (6.56) (9.8) (13.1) (16.4)
0
40
0
1000
10
1
(0.04)
1000
(39.4)
10
(0.39)
100
(3.9)
100
10
1
0.1
(0.33)
1000 10000
(39.4) (393.7)
Distance [mm (in.)]
Distance [mm (in.)]
Beam Pattern
Standard Diffuse [400 mm]
Standard Diffuse [1 m]
--0.4
4
6
8
Beam Diameter (m)
--15
Beam Diameter (mm)
--0.6
--6
0
--10
--5
0
5
10
15
100
(3.94)
200
(7.87)
300
(11.8)
400
(15.7)
100
(328)
--0.2
0
0.2
0.4
0.6
20
0
10
(32.8)
Transmitted Beam [16 m]
--20
2
1
(3.28)
Distance [m (ft)]
--8
--4
--2
3
4
(9.8) (13.1)
Transmitted Beam [16 m]
1
1
1
2
(3.3) (6.56)
Distance [m (ft)]
Operating Margin (X)
10
100
(3.9)
0
20
7.5
6
(19.7) (24.6)
4
(13.1)
100
Operating Margin (X)
Operating Margin (X)
2
(6.56)
Standard Diffuse [1 m]
100
10
(0.39)
--20
Distance [m (ft)]
Operating Margin
Standard Diffuse [400 mm]
1
(0.04)
--40
60
80
Distance [m (ft)]
Beam Diameter (mm)
Polarized Retroreflective [3.8 m]
--80
--80
--60
Beam Diameter (mm)
Beam Diameter (mm)
Beam Pattern
Retroreflective [4.8 m]
0
Distance [mm (in.)]
200 400 600 800 1000
(7.87) (15.75)(23.6) (31.5)(39.37)
Distance [mm (in.)]
0
4
8
12
16 20
(13.1) (26.2) (39.4) (52.5) (65.6)
Distance [m (ft)]
indicates that the sensor is getting close to detection of
a background. Stability may be optimized by reducing
the reflectivity of the background or reducing the
sensitivity. Reducing the sensitivity shortens the sensing
range. If sensitivity is reduced, check that the green and
yellow LEDs are on when the object is detected (step 2
above). In applications where full range is needed, i.e.,
sensitivity cannot be reduced, the green LED may be
left flashing.
b. For retroreflective and transmitted beam applications,
place the object to be sensed in the beam path and
observe the green LED. If the green LED is ON, the
sensor is ready to operate. If the green LED is flashing
(at 6 Hz), it indicates that the sensor is receiving more
than half the signal required to energize the L.O. output
when there should be minimal or no received signal. It
indicates that the object being detected is letting some
light go through (semi-transparent or too small in size).
Adjust sensitivity and repeat step 2.
Sensor Alignment
1. Ensure that the sensitivity dial is set at its maximum
(factory default) setting.
2. Pan the sensor left, right, up and down to center the beam
on the sensed object (for diffuse), reflector (for
retroreflective) or transmitter (for transmitted beam). Fix the
sensor position when the green LED is ON (not flashing)
and the yellow output LED is ON (light sensed and L.O.
energized). This set up assures a good margin and that the
signal received is greater than twice the signal required to
energize the L.O. output.
3.
a. For diffuse applications, remove the object being sensed
and observe the green LED. If the green LED is ON, the
sensor is ready to operate. If the green LED is flashing
(at 6 Hz), it indicates that the sensor is receiving more
than half the signal required to energize the L.O. output
when there should be minimal or no received signal. It
3
Retroreflective/Polarized Retroreflective
Right Angle Bracket #60--2657
For shiny objects, angle the sensor so that the beam is not
perpendicular to the object. For highly reflective materials use
a polarized retroreflective sensor.
18.5 (0.73) dia.
14.3
(0.75) 35.8
15.7
(0.62)
90°
Transmitted Beam
(1.41)
35.8
(1.41)
3 Plc
30°
For applications requiring adjacent sensors, you can alternate
the position of the receiver and the emitter to avoid sensor
crosstalk. For applications requiring more than two adjacent
sensors, you must space adjacent emitters (as well as
adjacent receivers) at least 1 m (3.28 ft) apart (see
transmitted beam, beam pattern on page ).
15.7
(0.62)
4.6
(0.18)
4 Plc
29
(1.14)
12.7
(0.50)
42.4
(1.67)
Mounting the Sensor
Securely mount the sensor on firm, stable surface or support.
For installation convenience, we offer the following mounting
brackets.
ATTENTION
R 24
(0.95)
1.5
(0.06)
Ref
Straight Bracket #60--2656
30°
3 Places
A mounting, which is subject to
excessive vibration or shifting may
cause intermittent operation.
18.5 (0.73) dia.
R 24
(0.95)
70
(2.78)
52
(2.04)
2 Plc
Swivel/Tilt Bracket #60--2649
29
(1.14)
27.9
(1.10)
1.5 (0.06)
Ref
20.32
(0.80)
29.2
(1.15)
53
(2.10)
4.6
(0.18)
4 Plc
12.7 (0.50)
15.7 (0.62)
R 15 (0.59)
42.4
(1.67)
Cordsets & Accessories
28.6
(1.125)
12.7
(0.50)
50.8
(2.0)
Description
66.0
(2.6)
PN--28860
10000036196 Ver 01
4
Cat. No.
DC Micro QD Cordset,
4-pin, 2 m
889D--F4AC--2
Reflector, 0.76 mm (3 in.)
diameter with center mount
hole
92--124
Reflector, 32 mm
(1.25 in.) dia. Requires
adhesive backing.
92--47