MX21 INSTA-MOUNT™
|
SERIES
MODULAR INCREMENTAL ROTARY OPTICAL ENCODER
Introduction
By the time you have read this first sentence, you could have installed
the model MX21 INSTA-MOUNT™ modular optical encoder. In addition
to its quick and easy installation, the MX21 is designed to operate with
jitter-free output signals without tight controls on shaft endplay, runout,
or perpendicularity. The new INSTA-MOUNT™ encoder is capable of
operating within a temperature range of -10°to +70°C, requiring less
than 30 milliamps of L.E.D. current, without degradation of output
signals and is short circuit protected.
The MX21 is perfectly suited for motor manufacturers and other high
volume OEMs. The INSTA-MOUNT™ Series encoder offers 5V TTL
compatible quadrature outputs with index and complements as options.
Axial shaft movements during operation, of ±0.010”, will not adversely
affect the output signals. Shaft runouts of 0.005” TIR can also be
absorbed by this device without affecting output signal performance.
SPECIFICATIONS
Mechanical
Dimensions
Weight
Moment of Inertia
Bore Size
See Figure 1
2.1 oz. (Approx.)
2.6 x 10
-5
oz in sec
2
see “Ordering Options”
Motor Interface
Mount Holes
Mount Hardware
Perpendicularity Shaft to Mount
Shaft Runout
Shaft Endplay Dynamic or Static
Shaft Finish
Shaft Tolerance
Shaft Length
#4-40 or M3 x 0.5 @ 180° on 1.812” dia. B.C.
2 socket head cap screws
0.002” TIR
0.005” max (each 0.0001 degrades accuracy by 0.5 arc minutes)
±0.010”
16 micro inches or better. End must be chamfered or rounded
nominal -0.0002”/-0.0007”
0.56” minimum (remove cover button for motor through-shafts)
Page 1
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Electrical
Code
Pulses per revolutions (PPR)
Index Pulse Options
Supply Voltage
Output Format
Incremental
See Ordering Options
MX212: No Index
MX213, MX216: U = Ungated Index, G = Gated Index
5 volts ±5% @ 80mA max.
MX212: Dual channel in quadrature
MX213: Dual channel in quadrature with index
MX216: Dual channel in quadrature with index and complements
MX212 & 213 :
square wave TTL. 16mA sink 500ΩA source.
Short circuit protected
MX216:
TTL differential line driver (26LS31 or equiv.) should be
terminated into a line receiver (26LS32, or equivalent circuit)
Frequency (kHz) = (RPM X PPR)/60
1.0μ sec. max.
Output Type
Frequency Response
Rise Time
Enviromental
Temperature
Operating: -10°C to +70°C
Storage: -40°C to +125°C
Terminations
Ribbon
Round Cable
*NOTE: See pinout tables, under “Terminations” section.
28 AWG flat ribbon cable with 10 position connector Berg P/N 65863-165
or equiv. Mates with Berg P/N65863-165 or equiv) (mating connector not
provided)
28AWG 8 Conductor shielded cable
DIMENSIONS
All dimensions are in: inches .xx = ±0.02, .xxx = ±0.005
Fig.1
Page 2
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INSTALLATION INSTRUCTIONS
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.
Page 3
Copyright © 2018 Sensata Technologies, Inc.
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OUTPUT WAVEFORM
TERMINATIONS
Pinout MX212/213
PIN #
1
2
3
4
5
Signal
Channel A
+5 volts
Ground
NC
NC
PIN #
6
7
8
9
10
Signal
NC
NC
Channel B
NC
Index (213)
PIN #
1
2
3
4
5
NC
Pinout MX216
Signal
+5 volts
Ground
NC
Channel A
PIN #
6
7
8
9
10
Signal
Channel A
Channel B
Channel B
Index
Index
Color Codes
Red
Black
White
Green
Orange
Blue
White/Black
Red/Black
+5 volts
Ground
A
B
Index
A
B
Index
Page 4
Copyright © 2018 Sensata Technologies, Inc.
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ORDERING OPTIONS
MX21
X
Example : MX213-38-512-G-R18
Use this diagram, working from left to right to construct your model number
-
XX
-
XXXX
-
X
-
XXX
Output Format
2 =
Quadrature
3 =
Quadrature w / index
6 =
Quadrature w / index & complements
Bore Size
25 =
.25”
38 =
.375”
6M =
6mm
8M =
8mm
10M =
10mm
Pulses Per Revolution (PPR)
200, 400, 500, 512, 1000, 1024
Index Option
*For Output Formats 3 and 6 ONLY
G =
gated to data A & B
U =
ungated
Electrical Termination
Cxx =
Round Shielded Cable
Rxx =
Ribbon Cable with 10 Pin Socket Header
(xx = length of cable in inches; 18 inches standard)
Page 5
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Copyright © 2018 Sensata Technologies, Inc.
No. 02122-001 Rev: 05/09/2018
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