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SCA28

Product catalog summary

Mechanical Specifications:
The SCA28 encoder features an aluminum housing, electroplated steel cap, and stainless steel shaft. It weighs approximately 40 grams, with a cable weight of 50 grams per meter. The bearing life exceeds 1.9 x 10¹⁰ revolutions at rated load, and the maximum shaft speed is 9,000 rpm. The starting torque is less than 0.005 Nm at 25°C, with a mass moment of inertia of 0.8 gcm². Maximum axial and radial shaft loads are 20 N.

Electrical Specifications:
The encoder operates on an incremental code with a resolution range of 1 to 7500 pulses per revolution (ppr). It requires a supply voltage between 4.5 Vdc and 30 Vdc, with a maximum output current of 25 mA per channel. The frequency response is up to 200 kHz. The output format includes two-channel quadrature with an index and optional complementary outputs. It features reverse polarity and output short circuit protection, and complies with EN61000-6-2:2005 and EN61000-6-3:2007 for EMC.

Environmental Specifications:
The operating and storage temperature range is -40°C to +85°C. It can withstand shocks of 100 G for 11 ms and vibrations from 10-2000 Hz at 10 G. The enclosure rating is IP 50, with an optional IP 65 rating.

Connection Options:
The encoder offers various cable options, including 8-lead differential and 5-lead standard cables, as well as a 10-lead flat cable with an IDC connector. Shaft diameters range from 4 mm to 1/4 inch, with resolutions up to 7500 ppr.

Ordering Code:
The ordering code includes specifications for pulses per revolution, output type, shaft diameter, IP rating, cable length, and connector type. Options include standard and differential outputs, various shaft sizes, and IP ratings.

Catalog excerpts

Automation / Mini Resolution: Supply Voltage: Output Voltage: Output Current: Frequency Response: Output Format: Phase Sense: Incremental 1 to 7500 ppr (pulses per revolution) 4,5 Vdc min. to 30 Vdc max. (35 mA max. - no load) Low: 500 mV max. at 10 mA High: (Vin – 0,6) at -10 mA (Vin – 1,3) at -25 mA 25 mA max. load per output channel 200 kHz max. Housing: Aluminum Cap: Electroplated Steel Shaft: Stainless Steel Encoder: ~ 40 gr (1,41 oz) Cable: 50 gr / meter (1,76 oz / meter) > 1,9 x 1010 revolutions at rated load Shaft Speed: Starting Torque: Mass Moment of Inertia: Shaft Loads: Axial: Radial: Two channel (A, B) quadrature with Index (Z) and optional complementary (A-, B-, Z-) outputs A leads B clockwise (CW) from the mounting end of the encoder Noise Immunity: Bearing Life: Gated with Channels A and B high Electrical Protection: Mechanical Specifications Electrical Specifications Shaft Encoder - ASIC Push pull and Differential OL7272 Push-pull and Differential Line Driver 26C31 Differential Line Driver 5V output (with 5V input) Reverse polarity and output short circuit protected Tested to EN61000-6-2 : 2005 (industrial environments) Electromagnetic compatibility (EMC) and EN 61000-6-3 : 2007 (residential, commercial, and lightindustrial environments) for Electromagnetic compatibility (EMC) Environmental Specifications Operating Temp.: Storage Temp.: Enclosure Rating: IP 50 / Nema 5 (approx.) IP 65 / Nema 4 (approx.) - option Connection Options Cable: 8 leads (0,05 mm2, 30 AWG) - Differential 5 leads (0,14 mm2, 26 AWG) - Standard twisted pairs; shielded Flat Cable: 10 lead flat cable with IDC connector ** = It is recommended, not to combine max. value for all 3 parameters.

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Type SCA28 Output waveform Disk Resolutions (pulses per revolution) Channel tolerance Phase difference tolerance Z channel tolerance Other options on request Pulses per revolution, min. 1 – max. 7.500 Mechanical Dimensions

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Industrial Encoders Flat Ribbon Cable with IDC connector

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Type SCA28 Output Terminations Standard Cable Standard Output Channel A AB BZ ZVsup GND Flat Cable w/ IDC Connector Differential Output Wire Color Green NC Yellow NC Gray NC Brown White Differential Output * Position Pink Gray Green Yellow White Brown Red Blue * Hewlett Packard (HP) compatible Differential Output IP 50 rating CE mark not available 0,5 m, 1 m, or 2 m cable length only Standard Output mm (inches) mm (inches) mm (inches)

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Type SCA28 Ordering Code Cable Length Cable Takeout Standard Differential 26C31 Line Driver 5V only OL 7272 Line Driver Standard - with built-in TSM ** Standard Cable Standard is 1 meter Specify length Flat Cable w/ IDC 0,5 meter 1,0 meter 2,0 meters * = Only Flat Cable Side (radial) Back (axial) Flat cable w/ IDC connector ** Designed specifically for Wind Power applications. See SCA24 COC under Industries – Wind Power – SCA24 for additional conformity standards testing. Other options on request: Please contact Scancon A/S TSM = Transient Suppression Module Available only as Standard output

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