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 -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. 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 See Figure 1 Weight 2.1 oz. (Approx.) -5 2 Moment of Inertia 2.6 x 10 oz in sec Bore Size see Ordering Options Motor Interface Mount Holes 4-40 or M3 x 0.5 180 on 1.812 dia. B.C. Mount Hardware 2 socket head cap screws Perpendicularity Shaft to Mount 0.002 TIR Shaft Runout 0.005 max (each 0.0001 degrades accuracy by 0.5 arc minutes) Shaft Endplay Dynamic or Static 0.010 Shaft Finish 16 micro inches or better. End must be chamfered or rounded Shaft Tolerance nominal -0.0002/-0.0007 Shaft Length 0.56 minimum (remove cover button for motor through-shafts) Page 1 Copyright 2018 Sensata Technologies, Inc. www.sensata.comElectrical Code Incremental Pulses per revolutions (PPR) See Ordering Options MX212: No Index Index Pulse Options MX213, MX216: U = Ungated Index, G = Gated Index Supply Voltage 5 volts 5% 80mA max. MX212: Dual channel in quadrature Output Format MX213: Dual channel in quadrature with index MX216: Dual channel in quadrature with index and complements MX212 & 213 : s quare wave TTL. 16mA sink 500A source. Short circuit protected Output Type MX216: TTL differential line driver (26LS31 or equiv.) should be terminated into a line receiver (26LS32, or equivalent circuit) Frequency Response Frequency (kHz) = (RPM X PPR)/60 Rise Time 1.0 sec. max. Enviromental Operating: -10C to +70C Temperature Storage: -40C to +125C Terminations 28 AWG flat ribbon cable with 10 position connector Berg P/N 65863-165 Ribbon or equiv. Mates with Berg P/N65863-165 or equiv) (mating connector not provided) Round Cable 28AWG 8 Conductor shielded cable *NOTE: See pinout tables, under Terminations section. DIMENSIONS All dimensions are in: inches .xx = 0.02, .xxx = 0.005 Fig.1 Page 2 Copyright 2018 Sensata Technologies, Inc. www.sensata.com