Model SM23
Low Cost Multi-Purpose Encoder 

Rotary Incremental Encoder: Shaft Type SM23   Data Technology's SM23 is a low cost, high performance multi-purpose encoder. Along with precision surface mount technology, the SM23 also includes VMOS and CMOS circuitry which gives the encoder superior isolation between the output leads and the internal circuitry of the encoder.

The SM23 utilizes a monolithic solar array with stop gap diffusion which provides further noise immunity. The differential array tracks evenly under temperature, voltage and light source variations. This multi-purpose encoder is now available with differential line output as a standard. The available options for the SM23 vary to meet each individuals special needs and requirements.
     
MECHANICAL SPECIFICATIONS ELECTRICAL SPECIFICATIONS
Front End: All metal shaft and bearing housing - Face and servo mount standard
Cover: Injection molded flame retardant 94V-0 VDYNE Nylon
Operating Speed: Lower of 3000 RPM or 200 kHz max., Slew Speed 6000 RPM
Shaft Loading Max: Axial 10 lbs (4.54 Kg), Radial 10 lbs (4.54Kg)
Shaft Rotation: Bi-directional and continuous
Bearings: Shielded, Instrument Quality
Starting Torque: 0.05 oz-in (36 gm-cm)
Weight: 5 ounces		 Encoder Type: Optical Incremental
Resolution: 1-2500 CPR (cycles per revolution)
Power Input:
+5 VDC +/-10% 80 ma
+12 VDC +/-10% 120 ma
+15 VDC +/-10% 120 ma
Phase Relationship: A leads B by 90 degrees +/-18 degrees electrical
Symmetry: 180 degrees +/-9 degrees
Frequency Response: 200 kHz or 3000 RPM, whichever occurs first
Drive Capability: TTL and CMOS compatible
Output Mode: 5V, Power MOSFET (standard), 8830 differential line driver (-03 option); 12V & 15V, Power MOSFET (standard), MM88C30 differential line driver (-03 option)
Accuracy:
* Pulse to Adjacent Pulse: +/-6 arc seconds
* Pulse to Any Other Pulse: +/-3 arc minutes
Illumination Source: Single Infrared Emitting Diode (IRLED) Gallium Aluminum Arsenide (GaAIAs)

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