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www.beiied.comSpecification No. 02122-001 Rev11-10
Preparation:
1.
Inspect motor interface per MX21 Data Sheet or specification drawing.
2.
Motor shaft must be free of burrs & other surface defects.
Installation:
1.
Motor shaft should NOT be rotating during initial encoder installation.
2.
Hold encoder perpendicular to motor shaft. Guide the encoder onto the motor shaft,
pushing encoder STRAIGHT on until it is flush against the mount surface. Do NOT
rock side to side.
3.
Install two #4-40 mount screws. Do not fully tighten at this point. (Note: A thread
sealant should be applied to the screw threads)
4.
Rotate the motor shaft (300 RPM, minimum). Press the air-gap button until it
bottoms to the top of the encoder momentarily, then release. CAUTION: DO NOT
press air-gap button while motor shaft is stationary. Button should only be pressed
for one or two seconds while shaft is rotating.
5.
Tighten mounting screws fully. (recommended torque is 30 to 40 ounce inches.)
6.
This completes the mechanical installation. Proceed with electrical connections as
indicated on product data sheet or specification drawing.
Removal:
1.
Motor shaft may be stationary or rotating up to 1000 RPM during encoder removal.
2.
Remove two mounting screws.
3.
Grasp encoder firmly and pull STRAIGHT off of the motor shaft. Do NOT rock side
to side.
Dimensions
BEI Sensors
Output
Waveform
MX21 INSTA-MOUNT Series—Modular
Incremental Rotary Optical Encoder
Figure 3
Terminations
CCW ROTATION OF SHAFT
MX212 outputs A & B ONLY
MX213 outputs A, B & INDEX ONLY
MX216 outputs as shown
360°E NOM
180°E NOM
90°E NOM
A
B
INDEX
INDEX GATED TO A&B
90°E TO 450°E
INDEX UNGATED
Installation
Instructions
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