Rockwell Automation 42CF User Manual

Installation Instructions

PHOTOSWITCH® Bulletin 42CF General Purpose 12mm Cylindrical

IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.

Description

The 42CF is a family of general purpose photoelectric sensors
intended for light to medium duty industrial applications. They
are packaged in an industry standard 12mm cylindrical
housing.

Three possible modes of sensing include transmitted beam,
diffuse and polarized retroreflective, allow the 42CF to be
used in a variety of complex applications.

Indication of target presence is provided through a discrete
NPN or PNP output which is compatible with most
measurement and control circuits found in today’s factory
automation systems. Outputs are short-circuit protected to
provide continuous operation even under unexpected
conditions.

Features

S

Short circuit protection

S Reverse polarity protection
S Light status LED Indicator
S NPN or PNP outputs
S L.O. or D.O.
S Teach and remote teach function

General Specifications

Light Source Infrared 880nm or visible red 660nm

Unit Protection Reverse polarity, output shortĆcircuit and overload

Supply Voltage 10-30V DC

Current Consumption 20mA maximum

Output Type NPN or PNP

Output Mode Light or dark operate selectable

Output Rating 100mA

Response Time Transmitted beam: 2ms

Housing Material NickelĆplated brass

Lens Material Acrylic

LED Indicators Yellow light status LED indicator

Connection Types 2m cable, 4Ćpin DC micro QD

Optional Accessories Mounting brackets, reflectors, cordsets

Operating Environment IP67, Type 1 enclosure

Vibration 10-55Hz, 0.5mm amplitude, Meets or exceeds IEC

Operating Temperature

Relative Humidity 29 to 90%

Ambient Light Immunity 3000 Lx

Approvals cULus and CE marked for all applicable directives

protection (SCP)

Diffuse and polarized retroreflective: 1.25ms

60068-2-6

Shock 30g with 11ms pulse duration, Meets or exceeds

IEC 60068-2-27

-25_C to +70_C (-13_F to +158_F)

Dimensions—mm (inches)

Diffuse and Polarized Retroreflective

55 (2.16)

2.5

(0.09)

34 (1.33)

Transmitted Beam

54.5 (2.14)

4.4

(0.17)

17.7

(0.69)

12.3

(0.48)

4.0 (0.15)

0.8 (0.03)

4.0 (0.15)

3.75 (0.14)
Dia.

2.5

(0.09)

M12 x 1M12 x 1

(0.07)

66 (2.60)

22.3

(0.87)

6.5

(0.25)

1.0 (0.04)

34 (1.33) 22 (0.86) 1.0 (0.04)

65.5 (2.57)

2.0

4.4

(0.17)

Installation

The Type 42CF Series sensor must be mounted on a firm,
stable surface or support. A mounting, which is subject to
excessive vibration or shifting may cause intermittent
operation. For installation convenience, we offer the following
mounting bracket.

Right Angle Bracket #871A-BRN12

5.54

(0.21)

9.53

(0.37)

Right Angle Bracket #871A-BRF12

28.5

(1.13)

13.46
(0.53)

12.7

(0.50)

19.1

(0.75)

38.1 (1.50)

31.75 (1.25)

12.7

(0.50)

13.9

(0.55)

14.3

(0.56)

7.92

(0.31)

12.15 (0.47)
Dia.

38.1

(1.50)

34.8

(1.37)

3.02

(0.11)

1.78

(0.07)

90°

25.4 (1.0)

90°

Alignment

Polarized Retroreflective

Install the retroreflector so that its surface is perpendicular to
the sensor’s optical axis. Ensure that distance between the
sensor and reflector does not exceed sensor’s specifications.
Secure sensor in a stable position and select output state (LO
or DO). To achieve best alignment, use the following
procedure. Sweep the beam on the reflector in the horizontal
plane and determine the position the LED indicator turns On
and then Off. Set the beam halfway between both positions.
Do the same in the vertical plane. Break the beam with the
object to be detected and ensure the LED indicator changes
state.

For sensing semi-transparent objects use the fine adjustment
feature. Press the teach button, or connect pin 2 (white) to
ground for t > 8 seconds, until the yellow LED starts flashing.
The threshold is set below the detected signal of the
hysteresis amplitude. Adjust the sensor vertically and
horizontally until the LED switches on constantly or at least
until the frequency of the flashes decreases. Secure the
sensor in a stable position and ensure that the LED switches
off when the beam is interrupted by the target object. A solid
LED during both target presence and absence denotes
inability to sense a semi-transparent object, another solution
must be used.

Transmitted Beam

Using recommended brackets, provisionally mount the emitter
and receiver within sensing specifications. Position the
sensors so that they coincide with the optical axis as much as
possible. To achieve best alignment, use the following
procedure. Sweep the beam on the emitter in the horizontal
plane and determine the position the LED indicator turns On
and then Off. Set the beam halfway between both positions.
Do the same in the vertical plane, and repeat the procedure
for the Receiver. Break the beam with the object to be
detected and ensure the LED indicator changes state.

Diffuse

Teach

19.05
(0.75)

13.46

(0.53)

5.54 (0.21)
Dia.

Present target in front of the sensor face within sensing range.
Push and release “Teach Button” with target present. Remove
and restore the target being detected ensuring that indicator
turns on and off.

Solid yellow LED represents target presence with 2X margin
signal strength. Blinking yellow LED represents target
presence with signal strength meeting switching threshold but
less than 2X margin.

Remote-Teach

A momentary N.O. pushbutton switch must be wired between
the white wire and dc common. Present target in front of the
sensor face within sensing range. Push and release
“Momentary Push Button.” Restore and remove the target
being detected ensuring that indicator turns on and off.

Solid yellow LED represents target presence with 2X margin
signal strength. Blinking yellow LED represents target
presence with signal strength meeting switching threshold but
less than 2X margin.

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