Rockwell Automation 42CF General Purpose 12mm Cylindrical - Manual (Page 2)

2
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
90°
38.1
(1.50)
12.7
(0.50)
12.7
(0.50)
1.78
(0.07)
13.9
(0.55)
14.3
(0.56)
34.8
(1.37)
38.1 (1.50)
19.1
(0.75)
5.54
(0.21)
9.53
(0.37)
7.92
(0.31)
Right Angle Bracket #871A-BRF12
19.05
(0.75)
13.46
(0.53)
5.54 (0.21)
Dia.
31.75 (1.25)
90°
28.5
(1.13)
13.46
(0.53)
12.15 (0.47)
Dia.
3.02
(0.11)
25.4 (1.0)
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
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.