Rockwell Automation 45MLA Measuring Light Array Sensors - Manual (Page 2)

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Mounting Instructions
1. Both the emitter and receiver profiles are lined with
continuous grooves to attach to the mounting brackets,
allowing these brackets to be attached at any position along
the length of the housing. Note: A flat mounting kit is also
available for purchase separately.
2. Align the emitter and receiver such that the two units are
parallel to each other and the sides with the photosensor
elements (and the clear plastic lenses) are facing each other.
3. Please note that the receiver (blue connector) can be sensitive
to interference light. No other source of external light,
including the emitters of any photoelectric sensor, array, or
reflective surface, should be directed towards the receiver
housing. Although the 45MLA is tolerant of bright sunlight, it is
better practice to mount the receiver housing such that no sun
light shines directly into the curved front area of the receiver
lens.
Electrical Installation
Both light arrays must be connected to the controller through the
RJ45 connectors. For ease of connection, the pigtail connector for
the emitter has a white marker, and the receiver has a blue
marker. Be sure to connect the emitter to the plug connection on
the controller with the white marker, and the receiver to the plug
connection with a blue marker.
Array LED Description Color Meaning
Green (also LED D1 on controller) Light array alignment
Off Target present or arrays not aligned
Green Target not present, arrays aligned and within range
Green (flashing) Light intensity inadequate
Red (also LED D2 on controller) Light array status
Off Target not present (and arrays aligned)
Red Target present (or arrays not aligned)
Red (flashing) Height measurement error
In addition, the connectors cables are offered with both blue and
white rings attached to each end of each cable. Remove the blue
markers from the emitter's cable and the white ones from the
receiver's cable so that the cables are marked appropriately for
future use.
The individual light arrays are powered through this connection
to the controller. Please refer to the Installation Instructions
corresponding to the specific controller that you are using for
further details on wiring and connecting the controller.
Alignment
This is a crucial step in the setup since sensor operation is
dependent on correct alignment of the emitter and receiver. This
process is simplified by using the green LED on the receiver unit
to serve as an indication of proper alignment.
Horizontal Alignment
1. Aim the receiver 90° away from the emitter (light source) and
verify that the red status LEDs on both the receiver and emitter
are ON.
2. Slowly rotate the receiver to face the emitter and note the
point at which these red LEDs turn OFF and the green
alignment LED turns ON.
3. Continue to rotate the receiver away from the emitter until the
green LED turns OFF again, and the red LEDs turn ON. Note the
point at which this happens.
4. For horizontal centering, rotate the array halfway between the
two points at which the red LEDs turn OFF.
Red LED Off
Green LED On Red LED On
45MLA
Not Aligned Aligned
Green LED Off