MX21 INSTA-MOUNT SeriesModular BEI Sensors Incremental Rotary Optical Encoder By the time you have read this first sentence, you could have installed BEIs 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 -10to +70C, 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. BEIs INSTA-MOUNT Series encoder offers 5V TTL compatible quadrature outputs with index and complements as options. Axial shaft movements during operation, o f0.010 , 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. Mechanical Specifications Electrical Specifications Environmental Specifications Dimensions: See Figure 1 Code: Incremental Temperature: Weight: 2.1 oz. (Approx.) Pulses per revolutions (PPR): See Ordering Operating: -10C to +70C -5 2 Moment of Inertia: 2.6 x 10 oz in sec Options) Storage: -40C to +125C Bore Size: see Ordering Options Index Pulse Options ungated index (U) (no index on MX212) gated index (G) Termination Specifications Supply Voltage: 5 volts 5% 80mA max. Motor Interface Ribbon: 28 AWG flat ribbon cable with 10 position Output Format: dual channel quadrature & index Mount Holes: 4-40 or M3 x 0.5 180 on connector Berg P/N 65863-165 or equiv. Mates with (MX212 & 213) (no index on MX212) 1.812 dia. B.C. Berg P/N65863-165 or equiv) (mating connector not (MX216) dual channel quad & index w/ comps Mount Hardware: 2 sockethead cap screws provided) Output Type: Perpendicularity Shaft to Mount : 0.002 TIR Round Cable: 28AWG 8 Conductor shielded cable (MX212 &213): square wave TTL. 16mA sink Shaft Runout: 0.005 max (each 0.0001 500A source. Short circuit protected degrades accuracy by 0.5 arc minutes) *NOTE: See pinout tables, back page. (MX216): TTL differential line driver (26LS31 or Shaft Endplay Dynamic or Static: 0.010 equiv.) should be terminated into a line receiver Shaft Finish: 16 micro inches or better. End (26LS32, or equivalent circuit) must be chamfered or rounded Frequency Response: see graph: Fig 3 Shaft Tolerance: nominal -0.0002/-0.0007 Rise Time: 1.0 sec. max. Shaft Length: 0.56 minimum remove (remove cover button for motor through-shafts) MX21 Series Encoder Ordering Options: for assistance, call 800.350.2727 Use this diagram, working from left to right to construct your model number (example: MX213-38-512-G-R18) MX21 X XX XXXX X XXX ELECTRICAL TERMINATION: INDEX OPTION OUTPUT FORMAT: Cxx = Round Shielded Cable 2= Quadrature *For Output Formats 3 BORE SIZE: Rxx = Ribbon Cable with 10 Pin Socket 3= Quadrature w / index and 6 ONLY 25 = .25 Header 6= Quadrature w / index & G= gated to data A & B 38 = .375 (xx = length of cable in inches 18 inches complements U= ungated 6M = 6mm standard) 8M = 8mm, 10M = 10mm PULSES PER REVOLUTION (PPR): 200, 400, 500, 512, 1000, 1024 Tel: 805-968-0782 /800-350-2727 Fax: 805-968-3154 /800-960-2726 7230 Hollister Ave., Goleta, CA 93117-2807 www.beiied.com Specification No. 02122-001 Rev11-10 MX21 INSTA-MOUNT SeriesModular BEI Sensors Incremental Rotary Optical Encoder Dimensions Output Waveform 360E NOM 180E NOM 90E NOM A A B B Installation INDEX GATED TO A&B Instructions 90E TO 450E INDEX UNGATED INDEX INDEX CCW ROTATION OF SHAFT MX212 outputs A & B ONLY MX213 outputs A, B & INDEX ONLY MX216 outputs as shown Figure 3 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. Terminations 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. These commodities, technology or software if exported from the United States must be in accordance with the Bureau of Industry, and Security, Export Administration regulations. Diversion contrary to U.S law is prohibited. Tel: 805-968-0782 /800-350-2727 Fax: 805-968-3154 /800-960-2726 7230 Hollister Ave., Goleta, CA 93117-2807 www.beiied.com Specification No. 02122-001 Rev11-10